Empathy List Archives

BI

Burt I. Weiner

Thu, Jul 5, 2012 3:19 PM

Many years ago I had one of these antennas that I used with a Gertsch
RLF-1 WWVB receiver. When the Nuvistors became old and feeble I
decided to change the 6CW4 Nuvistors to FETs. Being young and
foolish and thinking this is basically audio, I went to Radio Shack
and got some N-Channel FETs and stuffed the FET's leads into the
appropriate Nuvistor socket pins: Gate to Grid, Source to Cathode,
and Drain to Plate. As I recall, I had to add a wee bit of
capacitance to make it tune back down to 60 KC - back then I didn't
know from kHz. I made a voltage divider inside the antenna's
junction box to get the higher voltage down to what the FETs
wanted. It ran fine for the remaining 8 to10 years that I used the
RLF-1's. I forget where the antenna went, but it may still be in use
somewhere. At least I hope so.

Burt, K6OQK

From: Merchison Burke merchison@yahoo.co.uk
To: time-nuts@febo.com
Subject: [time-nuts] HP 117/10509a

Hello,

Has anyone successfully replaces the Nuvistors in the 117 and the 10509a
with FETs. I would like to replace them with inexpensive FETs instead of
buying the expensive Nunistors.

Thanks for all help,
Merchison

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
biwa@att.net
www.biwa.cc
K6OQK

Many years ago I had one of these antennas that I used with a Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and feeble I decided to change the 6CW4 Nuvistors to FETs. Being young and foolish and thinking this is basically audio, I went to Radio Shack and got some N-Channel FETs and stuffed the FET's leads into the appropriate Nuvistor socket pins: Gate to Grid, Source to Cathode, and Drain to Plate. As I recall, I had to add a wee bit of capacitance to make it tune back down to 60 KC - back then I didn't know from kHz. I made a voltage divider inside the antenna's junction box to get the higher voltage down to what the FETs wanted. It ran fine for the remaining 8 to10 years that I used the RLF-1's. I forget where the antenna went, but it may still be in use somewhere. At least I hope so. Burt, K6OQK >From: Merchison Burke <merchison@yahoo.co.uk> >To: time-nuts@febo.com >Subject: [time-nuts] HP 117/10509a > >Hello, > >Has anyone successfully replaces the Nuvistors in the 117 and the 10509a >with FETs. I would like to replace them with inexpensive FETs instead of >buying the expensive Nunistors. > >Thanks for all help, >Merchison Burt I. Weiner Associates Broadcast Technical Services Glendale, California U.S.A. biwa@att.net www.biwa.cc K6OQK

MB

Merchison Burke

Thu, Jul 5, 2012 4:32 PM

I thought about doing that but I did not want to spend a lot of time
experimenting fruitlessly.

Thanks for the encouragement.

Merchison

On 2012-07-05 11:19 AM, Burt I. Weiner wrote:

Many years ago I had one of these antennas that I used with a Gertsch
RLF-1 WWVB receiver. When the Nuvistors became old and feeble I
decided to change the 6CW4 Nuvistors to FETs. Being young and foolish
and thinking this is basically audio, I went to Radio Shack and got
some N-Channel FETs and stuffed the FET's leads into the appropriate
Nuvistor socket pins: Gate to Grid, Source to Cathode, and Drain to
Plate. As I recall, I had to add a wee bit of capacitance to make it
tune back down to 60 KC - back then I didn't know from kHz. I made a
voltage divider inside the antenna's junction box to get the higher
voltage down to what the FETs wanted. It ran fine for the remaining 8
to10 years that I used the RLF-1's. I forget where the antenna went,
but it may still be in use somewhere. At least I hope so.

Burt, K6OQK

From: Merchison Burke merchison@yahoo.co.uk
To: time-nuts@febo.com
Subject: [time-nuts] HP 117/10509a

Hello,

Has anyone successfully replaces the Nuvistors in the 117 and the 10509a
with FETs. I would like to replace them with inexpensive FETs instead of
buying the expensive Nunistors.

Thanks for all help,
Merchison

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
biwa@att.net
www.biwa.cc
K6OQK

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date: 07/05/12

I thought about doing that but I did not want to spend a lot of time experimenting fruitlessly. Thanks for the encouragement. Merchison On 2012-07-05 11:19 AM, Burt I. Weiner wrote: > Many years ago I had one of these antennas that I used with a Gertsch > RLF-1 WWVB receiver. When the Nuvistors became old and feeble I > decided to change the 6CW4 Nuvistors to FETs. Being young and foolish > and thinking this is basically audio, I went to Radio Shack and got > some N-Channel FETs and stuffed the FET's leads into the appropriate > Nuvistor socket pins: Gate to Grid, Source to Cathode, and Drain to > Plate. As I recall, I had to add a wee bit of capacitance to make it > tune back down to 60 KC - back then I didn't know from kHz. I made a > voltage divider inside the antenna's junction box to get the higher > voltage down to what the FETs wanted. It ran fine for the remaining 8 > to10 years that I used the RLF-1's. I forget where the antenna went, > but it may still be in use somewhere. At least I hope so. > > Burt, K6OQK > >> From: Merchison Burke <merchison@yahoo.co.uk> >> To: time-nuts@febo.com >> Subject: [time-nuts] HP 117/10509a >> >> Hello, >> >> Has anyone successfully replaces the Nuvistors in the 117 and the 10509a >> with FETs. I would like to replace them with inexpensive FETs instead of >> buying the expensive Nunistors. >> >> Thanks for all help, >> Merchison > > Burt I. Weiner Associates > Broadcast Technical Services > Glendale, California U.S.A. > biwa@att.net > www.biwa.cc > K6OQK > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date: 07/05/12 > >

EM

Edgardo Molina

Thu, Jul 5, 2012 5:07 PM

Dear Group,

This thread just saved me from a prospective purchase of an HP 117.

Now the big question. Which instruments in general will be affected by
the BPSK transition? I have been reading about Kinemetrics 60DC WWVB
receiver and clock. It appeals to me if I find one. Will other WWVB
instruments not designed specifically for phase comparisons be
affected for the WWVB signal modulation changes? Which kind of
instruments and interactions with WWVB should I avoid?

Thank you. Your comments are surely welcome.

Regards,

Edgardo Molina
Dirección IPTEL

www.iptel.net.mx

T : 55 55 55202444
M : 04455 20501854

Piensa en Bits SA de CV

Información anexa:

CONFIDENCIALIDAD DE INFORMACION

Este mensaje tiene carácter confidencial. Si usted no es el
destinarario de este mensaje, le suplicamos se lo notifique al
remitente mediante un correo electrónico y que borre el presente
mensaje y sus anexos de su computadora sin retener una copia de los
mismos. Queda estrictamente prohibido copiar este mensaje o hacer
usode el para cualquier propósito o divulgar su en forma parcial o
total su contenido. Gracias.

NON-DISCLOSURE OF INFORMATION

This email is strictly confidential and may also be privileged. If you
are not the intended recipient please immediately advise the sender by
replying to this e-mail and then deleting the message and its
attachments from your computer without keeping a copy. It is strictly
forbidden to copy it or use it for any purpose or disclose its
contents to any third party. Thank you.

On Jul 5, 2012, at 11:32 AM, Merchison Burke wrote:

I thought about doing that but I did not want to spend a lot of time
experimenting fruitlessly.

Thanks for the encouragement.

Merchison

On 2012-07-05 11:19 AM, Burt I. Weiner wrote:

Many years ago I had one of these antennas that I used with a
Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and
feeble I decided to change the 6CW4 Nuvistors to FETs. Being young
and foolish and thinking this is basically audio, I went to Radio
Shack and got some N-Channel FETs and stuffed the FET's leads into
the appropriate Nuvistor socket pins: Gate to Grid, Source to
Cathode, and Drain to Plate. As I recall, I had to add a wee bit
of capacitance to make it tune back down to 60 KC - back then I
didn't know from kHz. I made a voltage divider inside the
antenna's junction box to get the higher voltage down to what the
FETs wanted. It ran fine for the remaining 8 to10 years that I
used the RLF-1's. I forget where the antenna went, but it may
still be in use somewhere. At least I hope so.

Burt, K6OQK

From: Merchison Burke merchison@yahoo.co.uk
To: time-nuts@febo.com
Subject: [time-nuts] HP 117/10509a

Hello,

Has anyone successfully replaces the Nuvistors in the 117 and the
10509a
with FETs. I would like to replace them with inexpensive FETs
instead of
buying the expensive Nunistors.

Thanks for all help,
Merchison

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
biwa@att.net
www.biwa.cc
K6OQK

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date:
07/05/12

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Dear Group, This thread just saved me from a prospective purchase of an HP 117. Now the big question. Which instruments in general will be affected by the BPSK transition? I have been reading about Kinemetrics 60DC WWVB receiver and clock. It appeals to me if I find one. Will other WWVB instruments not designed specifically for phase comparisons be affected for the WWVB signal modulation changes? Which kind of instruments and interactions with WWVB should I avoid? Thank you. Your comments are surely welcome. Regards, Edgardo Molina Dirección IPTEL www.iptel.net.mx T : 55 55 55202444 M : 04455 20501854 Piensa en Bits SA de CV Información anexa: CONFIDENCIALIDAD DE INFORMACION Este mensaje tiene carácter confidencial. Si usted no es el destinarario de este mensaje, le suplicamos se lo notifique al remitente mediante un correo electrónico y que borre el presente mensaje y sus anexos de su computadora sin retener una copia de los mismos. Queda estrictamente prohibido copiar este mensaje o hacer usode el para cualquier propósito o divulgar su en forma parcial o total su contenido. Gracias. NON-DISCLOSURE OF INFORMATION This email is strictly confidential and may also be privileged. If you are not the intended recipient please immediately advise the sender by replying to this e-mail and then deleting the message and its attachments from your computer without keeping a copy. It is strictly forbidden to copy it or use it for any purpose or disclose its contents to any third party. Thank you. On Jul 5, 2012, at 11:32 AM, Merchison Burke wrote: > I thought about doing that but I did not want to spend a lot of time > experimenting fruitlessly. > > Thanks for the encouragement. > > Merchison > > > On 2012-07-05 11:19 AM, Burt I. Weiner wrote: >> Many years ago I had one of these antennas that I used with a >> Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and >> feeble I decided to change the 6CW4 Nuvistors to FETs. Being young >> and foolish and thinking this is basically audio, I went to Radio >> Shack and got some N-Channel FETs and stuffed the FET's leads into >> the appropriate Nuvistor socket pins: Gate to Grid, Source to >> Cathode, and Drain to Plate. As I recall, I had to add a wee bit >> of capacitance to make it tune back down to 60 KC - back then I >> didn't know from kHz. I made a voltage divider inside the >> antenna's junction box to get the higher voltage down to what the >> FETs wanted. It ran fine for the remaining 8 to10 years that I >> used the RLF-1's. I forget where the antenna went, but it may >> still be in use somewhere. At least I hope so. >> >> Burt, K6OQK >> >>> From: Merchison Burke <merchison@yahoo.co.uk> >>> To: time-nuts@febo.com >>> Subject: [time-nuts] HP 117/10509a >>> >>> Hello, >>> >>> Has anyone successfully replaces the Nuvistors in the 117 and the >>> 10509a >>> with FETs. I would like to replace them with inexpensive FETs >>> instead of >>> buying the expensive Nunistors. >>> >>> Thanks for all help, >>> Merchison >> >> Burt I. Weiner Associates >> Broadcast Technical Services >> Glendale, California U.S.A. >> biwa@att.net >> www.biwa.cc >> K6OQK >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date: >> 07/05/12 >> >> > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

JF

J. Forster

Thu, Jul 5, 2012 5:28 PM

The only ones that will work are very recent designs.

The HP 117 and Fluke 207 will not work.
Many Spectracoms will not work. A few will. See their web site
The Stanford 620 will not, I believe. Some models may.

I posted a partial list some time ago.

Apparently, NIST is working on a receiver and possibly a retrofit. When it
will be available and how much it will cost is TBD.

I suspect the 'retrofit' will be the receiver with a 60 kHz output added,
nothing more, but don't know.

Seems to me, we are down to one egg in one basket. :((

-John

================

Dear Group,

This thread just saved me from a prospective purchase of an HP 117.

Now the big question. Which instruments in general will be affected by
the BPSK transition? I have been reading about Kinemetrics 60DC WWVB
receiver and clock. It appeals to me if I find one. Will other WWVB
instruments not designed specifically for phase comparisons be
affected for the WWVB signal modulation changes? Which kind of
instruments and interactions with WWVB should I avoid?

Thank you. Your comments are surely welcome.

Regards,

Edgardo Molina
Dirección IPTEL

www.iptel.net.mx

T : 55 55 55202444
M : 04455 20501854

Piensa en Bits SA de CV

Información anexa:

CONFIDENCIALIDAD DE INFORMACION

Este mensaje tiene carácter confidencial. Si usted no es el
destinarario de este mensaje, le suplicamos se lo notifique al
remitente mediante un correo electrónico y que borre el presente
mensaje y sus anexos de su computadora sin retener una copia de los
mismos. Queda estrictamente prohibido copiar este mensaje o hacer
usode el para cualquier propósito o divulgar su en forma parcial o
total su contenido. Gracias.

NON-DISCLOSURE OF INFORMATION

This email is strictly confidential and may also be privileged. If you
are not the intended recipient please immediately advise the sender by
replying to this e-mail and then deleting the message and its
attachments from your computer without keeping a copy. It is strictly
forbidden to copy it or use it for any purpose or disclose its
contents to any third party. Thank you.

On Jul 5, 2012, at 11:32 AM, Merchison Burke wrote:

I thought about doing that but I did not want to spend a lot of time
experimenting fruitlessly.

Thanks for the encouragement.

Merchison

On 2012-07-05 11:19 AM, Burt I. Weiner wrote:

Many years ago I had one of these antennas that I used with a
Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and
feeble I decided to change the 6CW4 Nuvistors to FETs. Being young
and foolish and thinking this is basically audio, I went to Radio
Shack and got some N-Channel FETs and stuffed the FET's leads into
the appropriate Nuvistor socket pins: Gate to Grid, Source to
Cathode, and Drain to Plate. As I recall, I had to add a wee bit
of capacitance to make it tune back down to 60 KC - back then I
didn't know from kHz. I made a voltage divider inside the
antenna's junction box to get the higher voltage down to what the
FETs wanted. It ran fine for the remaining 8 to10 years that I
used the RLF-1's. I forget where the antenna went, but it may
still be in use somewhere. At least I hope so.

Burt, K6OQK

From: Merchison Burke merchison@yahoo.co.uk
To: time-nuts@febo.com
Subject: [time-nuts] HP 117/10509a

Hello,

Has anyone successfully replaces the Nuvistors in the 117 and the
10509a
with FETs. I would like to replace them with inexpensive FETs
instead of
buying the expensive Nunistors.

Thanks for all help,
Merchison

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
biwa@att.net
www.biwa.cc
K6OQK

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date:
07/05/12

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

The only ones that will work are very recent designs. The HP 117 and Fluke 207 will not work. Many Spectracoms will not work. A few will. See their web site The Stanford 620 will not, I believe. Some models may. I posted a partial list some time ago. Apparently, NIST is working on a receiver and possibly a retrofit. When it will be available and how much it will cost is TBD. I suspect the 'retrofit' will be the receiver with a 60 kHz output added, nothing more, but don't know. Seems to me, we are down to one egg in one basket. :(( -John ================ > Dear Group, > > This thread just saved me from a prospective purchase of an HP 117. > > Now the big question. Which instruments in general will be affected by > the BPSK transition? I have been reading about Kinemetrics 60DC WWVB > receiver and clock. It appeals to me if I find one. Will other WWVB > instruments not designed specifically for phase comparisons be > affected for the WWVB signal modulation changes? Which kind of > instruments and interactions with WWVB should I avoid? > > Thank you. Your comments are surely welcome. > > Regards, > > > Edgardo Molina > Dirección IPTEL > > www.iptel.net.mx > > T : 55 55 55202444 > M : 04455 20501854 > > Piensa en Bits SA de CV > > > > Información anexa: > > > > > CONFIDENCIALIDAD DE INFORMACION > > Este mensaje tiene carácter confidencial. Si usted no es el > destinarario de este mensaje, le suplicamos se lo notifique al > remitente mediante un correo electrónico y que borre el presente > mensaje y sus anexos de su computadora sin retener una copia de los > mismos. Queda estrictamente prohibido copiar este mensaje o hacer > usode el para cualquier propósito o divulgar su en forma parcial o > total su contenido. Gracias. > > > NON-DISCLOSURE OF INFORMATION > > This email is strictly confidential and may also be privileged. If you > are not the intended recipient please immediately advise the sender by > replying to this e-mail and then deleting the message and its > attachments from your computer without keeping a copy. It is strictly > forbidden to copy it or use it for any purpose or disclose its > contents to any third party. Thank you. > > > > > > On Jul 5, 2012, at 11:32 AM, Merchison Burke wrote: > >> I thought about doing that but I did not want to spend a lot of time >> experimenting fruitlessly. >> >> Thanks for the encouragement. >> >> Merchison >> >> >> On 2012-07-05 11:19 AM, Burt I. Weiner wrote: >>> Many years ago I had one of these antennas that I used with a >>> Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and >>> feeble I decided to change the 6CW4 Nuvistors to FETs. Being young >>> and foolish and thinking this is basically audio, I went to Radio >>> Shack and got some N-Channel FETs and stuffed the FET's leads into >>> the appropriate Nuvistor socket pins: Gate to Grid, Source to >>> Cathode, and Drain to Plate. As I recall, I had to add a wee bit >>> of capacitance to make it tune back down to 60 KC - back then I >>> didn't know from kHz. I made a voltage divider inside the >>> antenna's junction box to get the higher voltage down to what the >>> FETs wanted. It ran fine for the remaining 8 to10 years that I >>> used the RLF-1's. I forget where the antenna went, but it may >>> still be in use somewhere. At least I hope so. >>> >>> Burt, K6OQK >>> >>>> From: Merchison Burke <merchison@yahoo.co.uk> >>>> To: time-nuts@febo.com >>>> Subject: [time-nuts] HP 117/10509a >>>> >>>> Hello, >>>> >>>> Has anyone successfully replaces the Nuvistors in the 117 and the >>>> 10509a >>>> with FETs. I would like to replace them with inexpensive FETs >>>> instead of >>>> buying the expensive Nunistors. >>>> >>>> Thanks for all help, >>>> Merchison >>> >>> Burt I. Weiner Associates >>> Broadcast Technical Services >>> Glendale, California U.S.A. >>> biwa@att.net >>> www.biwa.cc >>> K6OQK >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date: >>> 07/05/12 >>> >>> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > >

BC

Bob Camp

Thu, Jul 5, 2012 5:54 PM

Hi

Simple answer - they are still playing around with the signal format. It is totally unclear what the final format will really look like. Until they make up their minds there is only one safe bet - the clock on grandma's wall will still handle the wwvb format they use. Anything more complex than that is very much in the "who knows" category.

Bob

On Jul 5, 2012, at 1:07 PM, Edgardo Molina wrote:

Dear Group,

This thread just saved me from a prospective purchase of an HP 117.

Now the big question. Which instruments in general will be affected by the BPSK transition? I have been reading about Kinemetrics 60DC WWVB receiver and clock. It appeals to me if I find one. Will other WWVB instruments not designed specifically for phase comparisons be affected for the WWVB signal modulation changes? Which kind of instruments and interactions with WWVB should I avoid?

Thank you. Your comments are surely welcome.

Regards,

Edgardo Molina
Dirección IPTEL

www.iptel.net.mx

T : 55 55 55202444
M : 04455 20501854

Piensa en Bits SA de CV

Información anexa:

CONFIDENCIALIDAD DE INFORMACION

Este mensaje tiene carácter confidencial. Si usted no es el destinarario de este mensaje, le suplicamos se lo notifique al remitente mediante un correo electrónico y que borre el presente mensaje y sus anexos de su computadora sin retener una copia de los mismos. Queda estrictamente prohibido copiar este mensaje o hacer usode el para cualquier propósito o divulgar su en forma parcial o total su contenido. Gracias.

NON-DISCLOSURE OF INFORMATION

This email is strictly confidential and may also be privileged. If you are not the intended recipient please immediately advise the sender by replying to this e-mail and then deleting the message and its attachments from your computer without keeping a copy. It is strictly forbidden to copy it or use it for any purpose or disclose its contents to any third party. Thank you.

On Jul 5, 2012, at 11:32 AM, Merchison Burke wrote:

I thought about doing that but I did not want to spend a lot of time experimenting fruitlessly.

Thanks for the encouragement.

Merchison

On 2012-07-05 11:19 AM, Burt I. Weiner wrote:

Many years ago I had one of these antennas that I used with a Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and feeble I decided to change the 6CW4 Nuvistors to FETs. Being young and foolish and thinking this is basically audio, I went to Radio Shack and got some N-Channel FETs and stuffed the FET's leads into the appropriate Nuvistor socket pins: Gate to Grid, Source to Cathode, and Drain to Plate. As I recall, I had to add a wee bit of capacitance to make it tune back down to 60 KC - back then I didn't know from kHz. I made a voltage divider inside the antenna's junction box to get the higher voltage down to what the FETs wanted. It ran fine for the remaining 8 to10 years that I used the RLF-1's. I forget where the antenna went, but it may still be in use somewhere. At least I hope so.

Burt, K6OQK

From: Merchison Burke merchison@yahoo.co.uk
To: time-nuts@febo.com
Subject: [time-nuts] HP 117/10509a

Hello,

Has anyone successfully replaces the Nuvistors in the 117 and the 10509a
with FETs. I would like to replace them with inexpensive FETs instead of
buying the expensive Nunistors.

Thanks for all help,
Merchison

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
biwa@att.net
www.biwa.cc
K6OQK

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date: 07/05/12

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Hi Simple answer - they are still playing around with the signal format. It is totally unclear what the final format will really look like. Until they make up their minds there is only one safe bet - the clock on grandma's wall will still handle the wwvb format they use. Anything more complex than that is very much in the "who knows" category. Bob On Jul 5, 2012, at 1:07 PM, Edgardo Molina wrote: > Dear Group, > > This thread just saved me from a prospective purchase of an HP 117. > > Now the big question. Which instruments in general will be affected by the BPSK transition? I have been reading about Kinemetrics 60DC WWVB receiver and clock. It appeals to me if I find one. Will other WWVB instruments not designed specifically for phase comparisons be affected for the WWVB signal modulation changes? Which kind of instruments and interactions with WWVB should I avoid? > > Thank you. Your comments are surely welcome. > > Regards, > > > Edgardo Molina > Dirección IPTEL > > www.iptel.net.mx > > T : 55 55 55202444 > M : 04455 20501854 > > Piensa en Bits SA de CV > > > > Información anexa: > > > > > CONFIDENCIALIDAD DE INFORMACION > > Este mensaje tiene carácter confidencial. Si usted no es el destinarario de este mensaje, le suplicamos se lo notifique al remitente mediante un correo electrónico y que borre el presente mensaje y sus anexos de su computadora sin retener una copia de los mismos. Queda estrictamente prohibido copiar este mensaje o hacer usode el para cualquier propósito o divulgar su en forma parcial o total su contenido. Gracias. > > > NON-DISCLOSURE OF INFORMATION > > This email is strictly confidential and may also be privileged. If you are not the intended recipient please immediately advise the sender by replying to this e-mail and then deleting the message and its attachments from your computer without keeping a copy. It is strictly forbidden to copy it or use it for any purpose or disclose its contents to any third party. Thank you. > > > > > > On Jul 5, 2012, at 11:32 AM, Merchison Burke wrote: > >> I thought about doing that but I did not want to spend a lot of time experimenting fruitlessly. >> >> Thanks for the encouragement. >> >> Merchison >> >> >> On 2012-07-05 11:19 AM, Burt I. Weiner wrote: >>> Many years ago I had one of these antennas that I used with a Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and feeble I decided to change the 6CW4 Nuvistors to FETs. Being young and foolish and thinking this is basically audio, I went to Radio Shack and got some N-Channel FETs and stuffed the FET's leads into the appropriate Nuvistor socket pins: Gate to Grid, Source to Cathode, and Drain to Plate. As I recall, I had to add a wee bit of capacitance to make it tune back down to 60 KC - back then I didn't know from kHz. I made a voltage divider inside the antenna's junction box to get the higher voltage down to what the FETs wanted. It ran fine for the remaining 8 to10 years that I used the RLF-1's. I forget where the antenna went, but it may still be in use somewhere. At least I hope so. >>> >>> Burt, K6OQK >>> >>>> From: Merchison Burke <merchison@yahoo.co.uk> >>>> To: time-nuts@febo.com >>>> Subject: [time-nuts] HP 117/10509a >>>> >>>> Hello, >>>> >>>> Has anyone successfully replaces the Nuvistors in the 117 and the 10509a >>>> with FETs. I would like to replace them with inexpensive FETs instead of >>>> buying the expensive Nunistors. >>>> >>>> Thanks for all help, >>>> Merchison >>> >>> Burt I. Weiner Associates >>> Broadcast Technical Services >>> Glendale, California U.S.A. >>> biwa@att.net >>> www.biwa.cc >>> K6OQK >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date: 07/05/12 >>> >>> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

RW

Ron Ward

Thu, Jul 5, 2012 9:22 PM

Hi:
This is so frustrating!

Who makes cheap clocks? CHINA.

Who uses phase comparison? DOD, American Colleges and Universities,
Laboratories, Astronomers, American Private Industry, Time Nuts, ETC.

What is our government doing? They appear to be the best friend Chinese
manufacturers ever had!

Ron

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of J. Forster
Sent: Thursday, July 05, 2012 10:29 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 117/10509a...

The only ones that will work are very recent designs.

The HP 117 and Fluke 207 will not work.
Many Spectracoms will not work. A few will. See their web site
The Stanford 620 will not, I believe. Some models may.

I posted a partial list some time ago.

Apparently, NIST is working on a receiver and possibly a retrofit. When
it
will be available and how much it will cost is TBD.

I suspect the 'retrofit' will be the receiver with a 60 kHz output
added,
nothing more, but don't know.

Seems to me, we are down to one egg in one basket. :((

-John

================

Dear Group,

This thread just saved me from a prospective purchase of an HP 117.

Now the big question. Which instruments in general will be affected by
the BPSK transition? I have been reading about Kinemetrics 60DC WWVB
receiver and clock. It appeals to me if I find one. Will other WWVB
instruments not designed specifically for phase comparisons be
affected for the WWVB signal modulation changes? Which kind of
instruments and interactions with WWVB should I avoid?

Thank you. Your comments are surely welcome.

Regards,

Edgardo Molina
Dirección IPTEL

www.iptel.net.mx

T : 55 55 55202444
M : 04455 20501854

Piensa en Bits SA de CV

Información anexa:

CONFIDENCIALIDAD DE INFORMACION

Este mensaje tiene carácter confidencial. Si usted no es el
destinarario de este mensaje, le suplicamos se lo notifique al
remitente mediante un correo electrónico y que borre el presente
mensaje y sus anexos de su computadora sin retener una copia de los
mismos. Queda estrictamente prohibido copiar este mensaje o hacer
usode el para cualquier propósito o divulgar su en forma parcial o
total su contenido. Gracias.

NON-DISCLOSURE OF INFORMATION

This email is strictly confidential and may also be privileged. If you
are not the intended recipient please immediately advise the sender by
replying to this e-mail and then deleting the message and its
attachments from your computer without keeping a copy. It is strictly
forbidden to copy it or use it for any purpose or disclose its
contents to any third party. Thank you.

On Jul 5, 2012, at 11:32 AM, Merchison Burke wrote:

I thought about doing that but I did not want to spend a lot of time
experimenting fruitlessly.

Thanks for the encouragement.

Merchison

On 2012-07-05 11:19 AM, Burt I. Weiner wrote:

Many years ago I had one of these antennas that I used with a
Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and
feeble I decided to change the 6CW4 Nuvistors to FETs. Being young
and foolish and thinking this is basically audio, I went to Radio
Shack and got some N-Channel FETs and stuffed the FET's leads into
the appropriate Nuvistor socket pins: Gate to Grid, Source to
Cathode, and Drain to Plate. As I recall, I had to add a wee bit
of capacitance to make it tune back down to 60 KC - back then I
didn't know from kHz. I made a voltage divider inside the
antenna's junction box to get the higher voltage down to what the
FETs wanted. It ran fine for the remaining 8 to10 years that I
used the RLF-1's. I forget where the antenna went, but it may
still be in use somewhere. At least I hope so.

Burt, K6OQK

From: Merchison Burke merchison@yahoo.co.uk
To: time-nuts@febo.com
Subject: [time-nuts] HP 117/10509a

Hello,

Has anyone successfully replaces the Nuvistors in the 117 and the
10509a
with FETs. I would like to replace them with inexpensive FETs
instead of
buying the expensive Nunistors.

Thanks for all help,
Merchison

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
biwa@att.net
www.biwa.cc
K6OQK

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date:
07/05/12

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Hi: This is so frustrating! Who makes cheap clocks? CHINA. Who uses phase comparison? DOD, American Colleges and Universities, Laboratories, Astronomers, American Private Industry, Time Nuts, ETC. What is our government doing? They appear to be the best friend Chinese manufacturers ever had! Ron -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of J. Forster Sent: Thursday, July 05, 2012 10:29 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 117/10509a... The only ones that will work are very recent designs. The HP 117 and Fluke 207 will not work. Many Spectracoms will not work. A few will. See their web site The Stanford 620 will not, I believe. Some models may. I posted a partial list some time ago. Apparently, NIST is working on a receiver and possibly a retrofit. When it will be available and how much it will cost is TBD. I suspect the 'retrofit' will be the receiver with a 60 kHz output added, nothing more, but don't know. Seems to me, we are down to one egg in one basket. :(( -John ================ > Dear Group, > > This thread just saved me from a prospective purchase of an HP 117. > > Now the big question. Which instruments in general will be affected by > the BPSK transition? I have been reading about Kinemetrics 60DC WWVB > receiver and clock. It appeals to me if I find one. Will other WWVB > instruments not designed specifically for phase comparisons be > affected for the WWVB signal modulation changes? Which kind of > instruments and interactions with WWVB should I avoid? > > Thank you. Your comments are surely welcome. > > Regards, > > > Edgardo Molina > Dirección IPTEL > > www.iptel.net.mx > > T : 55 55 55202444 > M : 04455 20501854 > > Piensa en Bits SA de CV > > > > Información anexa: > > > > > CONFIDENCIALIDAD DE INFORMACION > > Este mensaje tiene carácter confidencial. Si usted no es el > destinarario de este mensaje, le suplicamos se lo notifique al > remitente mediante un correo electrónico y que borre el presente > mensaje y sus anexos de su computadora sin retener una copia de los > mismos. Queda estrictamente prohibido copiar este mensaje o hacer > usode el para cualquier propósito o divulgar su en forma parcial o > total su contenido. Gracias. > > > NON-DISCLOSURE OF INFORMATION > > This email is strictly confidential and may also be privileged. If you > are not the intended recipient please immediately advise the sender by > replying to this e-mail and then deleting the message and its > attachments from your computer without keeping a copy. It is strictly > forbidden to copy it or use it for any purpose or disclose its > contents to any third party. Thank you. > > > > > > On Jul 5, 2012, at 11:32 AM, Merchison Burke wrote: > >> I thought about doing that but I did not want to spend a lot of time >> experimenting fruitlessly. >> >> Thanks for the encouragement. >> >> Merchison >> >> >> On 2012-07-05 11:19 AM, Burt I. Weiner wrote: >>> Many years ago I had one of these antennas that I used with a >>> Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and >>> feeble I decided to change the 6CW4 Nuvistors to FETs. Being young >>> and foolish and thinking this is basically audio, I went to Radio >>> Shack and got some N-Channel FETs and stuffed the FET's leads into >>> the appropriate Nuvistor socket pins: Gate to Grid, Source to >>> Cathode, and Drain to Plate. As I recall, I had to add a wee bit >>> of capacitance to make it tune back down to 60 KC - back then I >>> didn't know from kHz. I made a voltage divider inside the >>> antenna's junction box to get the higher voltage down to what the >>> FETs wanted. It ran fine for the remaining 8 to10 years that I >>> used the RLF-1's. I forget where the antenna went, but it may >>> still be in use somewhere. At least I hope so. >>> >>> Burt, K6OQK >>> >>>> From: Merchison Burke <merchison@yahoo.co.uk> >>>> To: time-nuts@febo.com >>>> Subject: [time-nuts] HP 117/10509a >>>> >>>> Hello, >>>> >>>> Has anyone successfully replaces the Nuvistors in the 117 and the >>>> 10509a >>>> with FETs. I would like to replace them with inexpensive FETs >>>> instead of >>>> buying the expensive Nunistors. >>>> >>>> Thanks for all help, >>>> Merchison >>> >>> Burt I. Weiner Associates >>> Broadcast Technical Services >>> Glendale, California U.S.A. >>> biwa@att.net >>> www.biwa.cc >>> K6OQK >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date: >>> 07/05/12 >>> >>> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

JF

J. Forster

Thu, Jul 5, 2012 9:43 PM

Hi:
This is so frustrating!

Agreed.

Who makes cheap clocks? CHINA.

Who uses phase comparison? DOD, American Colleges and Universities,
Laboratories, Astronomers, American Private Industry, Time Nuts, ETC.

Not really. They have all drunk the GPS Kool-Aid.

To allow a second source for a standard of time interval, carries the
implication that GPS is not invulnerable. If that's true, people may
wonder what else needs a backup, like navigation? Electric grid
synchronization? Phones?

What is our government doing?

One man, one vote, (one time?). There are a lot more cheap Chinese
'Atomic' clocks sold every day than timing receivers sold in a year.
Numbers count.

They appear to be the best friend Chinese manufacturers ever had!

Certainly true, in The Donald's view. The US government plays checkers,
the Chinese and Japanese play Chess... to steal an analogy.

US companies, driven by Wall Street quarter-over-quarter greed, think
about the next quarter; Asian companies think about the next few decades.

The switch to HDTV was supposed to be a giant stimulus for the US
electronics industry, hence a US 'standard'. How did that work out? What
fraction of HDTVs are US made?

YMMV,

-John

==============

Ron

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of J. Forster
Sent: Thursday, July 05, 2012 10:29 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 117/10509a...

The only ones that will work are very recent designs.

The HP 117 and Fluke 207 will not work.
Many Spectracoms will not work. A few will. See their web site
The Stanford 620 will not, I believe. Some models may.

I posted a partial list some time ago.

Apparently, NIST is working on a receiver and possibly a retrofit. When
it
will be available and how much it will cost is TBD.

I suspect the 'retrofit' will be the receiver with a 60 kHz output
added,
nothing more, but don't know.

Seems to me, we are down to one egg in one basket. :((

-John

================

Dear Group,

This thread just saved me from a prospective purchase of an HP 117.

Now the big question. Which instruments in general will be affected by
the BPSK transition? I have been reading about Kinemetrics 60DC WWVB
receiver and clock. It appeals to me if I find one. Will other WWVB
instruments not designed specifically for phase comparisons be
affected for the WWVB signal modulation changes? Which kind of
instruments and interactions with WWVB should I avoid?

Thank you. Your comments are surely welcome.

Regards,

Edgardo Molina
Dirección IPTEL

www.iptel.net.mx

> Hi: > This is so frustrating! Agreed. > Who makes cheap clocks? CHINA. > > Who uses phase comparison? DOD, American Colleges and Universities, > Laboratories, Astronomers, American Private Industry, Time Nuts, ETC. Not really. They have all drunk the GPS Kool-Aid. To allow a second source for a standard of time interval, carries the implication that GPS is not invulnerable. If that's true, people may wonder what else needs a backup, like navigation? Electric grid synchronization? Phones? > What is our government doing? One man, one vote, (one time?). There are a lot more cheap Chinese 'Atomic' clocks sold every day than timing receivers sold in a year. Numbers count. > They appear to be the best friend Chinese manufacturers ever had! Certainly true, in The Donald's view. The US government plays checkers, the Chinese and Japanese play Chess... to steal an analogy. US companies, driven by Wall Street quarter-over-quarter greed, think about the next quarter; Asian companies think about the next few decades. The switch to HDTV was supposed to be a giant stimulus for the US electronics industry, hence a US 'standard'. How did that work out? What fraction of HDTVs are US made? YMMV, -John ============== > > Ron > > -----Original Message----- > From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On > Behalf Of J. Forster > Sent: Thursday, July 05, 2012 10:29 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] HP 117/10509a... > > The only ones that will work are very recent designs. > > The HP 117 and Fluke 207 will not work. > Many Spectracoms will not work. A few will. See their web site > The Stanford 620 will not, I believe. Some models may. > > I posted a partial list some time ago. > > Apparently, NIST is working on a receiver and possibly a retrofit. When > it > will be available and how much it will cost is TBD. > > I suspect the 'retrofit' will be the receiver with a 60 kHz output > added, > nothing more, but don't know. > > Seems to me, we are down to one egg in one basket. :(( > > -John > > ================ > > > >> Dear Group, >> >> This thread just saved me from a prospective purchase of an HP 117. >> >> Now the big question. Which instruments in general will be affected by >> the BPSK transition? I have been reading about Kinemetrics 60DC WWVB >> receiver and clock. It appeals to me if I find one. Will other WWVB >> instruments not designed specifically for phase comparisons be >> affected for the WWVB signal modulation changes? Which kind of >> instruments and interactions with WWVB should I avoid? >> >> Thank you. Your comments are surely welcome. >> >> Regards, >> >> >> Edgardo Molina >> Dirección IPTEL >> >> www.iptel.net.mx

BC

Bob Camp

Thu, Jul 5, 2012 10:03 PM

Hi

The real question is weather the BPSK will help us get significantly better accuracy out of WWVB or not. If it does, time marches on. If not - total waste of effort.

DSP based low frequency receivers are pretty easy to make. You still will need those antennas and preamps to make them work though. If I can get Loran-C type accuracy out of WWVB with the new modulation, I'll certainly build or buy a receiver.

Bob

On Jul 5, 2012, at 5:43 PM, J. Forster wrote:

Hi:
This is so frustrating!

Agreed.

Who makes cheap clocks? CHINA.

Who uses phase comparison? DOD, American Colleges and Universities,
Laboratories, Astronomers, American Private Industry, Time Nuts, ETC.

Not really. They have all drunk the GPS Kool-Aid.

To allow a second source for a standard of time interval, carries the
implication that GPS is not invulnerable. If that's true, people may
wonder what else needs a backup, like navigation? Electric grid
synchronization? Phones?

What is our government doing?

One man, one vote, (one time?). There are a lot more cheap Chinese
'Atomic' clocks sold every day than timing receivers sold in a year.
Numbers count.

They appear to be the best friend Chinese manufacturers ever had!

Certainly true, in The Donald's view. The US government plays checkers,
the Chinese and Japanese play Chess... to steal an analogy.

US companies, driven by Wall Street quarter-over-quarter greed, think
about the next quarter; Asian companies think about the next few decades.

The switch to HDTV was supposed to be a giant stimulus for the US
electronics industry, hence a US 'standard'. How did that work out? What
fraction of HDTVs are US made?

YMMV,

-John

==============

Ron

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of J. Forster
Sent: Thursday, July 05, 2012 10:29 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 117/10509a...

The only ones that will work are very recent designs.

The HP 117 and Fluke 207 will not work.
Many Spectracoms will not work. A few will. See their web site
The Stanford 620 will not, I believe. Some models may.

I posted a partial list some time ago.

Apparently, NIST is working on a receiver and possibly a retrofit. When
it
will be available and how much it will cost is TBD.

I suspect the 'retrofit' will be the receiver with a 60 kHz output
added,
nothing more, but don't know.

Seems to me, we are down to one egg in one basket. :((

-John

================

Dear Group,

This thread just saved me from a prospective purchase of an HP 117.

Now the big question. Which instruments in general will be affected by
the BPSK transition? I have been reading about Kinemetrics 60DC WWVB
receiver and clock. It appeals to me if I find one. Will other WWVB
instruments not designed specifically for phase comparisons be
affected for the WWVB signal modulation changes? Which kind of
instruments and interactions with WWVB should I avoid?

Thank you. Your comments are surely welcome.

Regards,

Edgardo Molina
Dirección IPTEL

www.iptel.net.mx

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Hi The real question is weather the BPSK will help us get significantly better accuracy out of WWVB or not. If it does, time marches on. If not - total waste of effort. DSP based low frequency receivers are pretty easy to make. You still will need those antennas and preamps to make them work though. If I can get Loran-C type accuracy out of WWVB with the new modulation, I'll certainly build or buy a receiver. Bob On Jul 5, 2012, at 5:43 PM, J. Forster wrote: >> Hi: >> This is so frustrating! > > Agreed. > >> Who makes cheap clocks? CHINA. >> >> Who uses phase comparison? DOD, American Colleges and Universities, >> Laboratories, Astronomers, American Private Industry, Time Nuts, ETC. > > Not really. They have all drunk the GPS Kool-Aid. > > To allow a second source for a standard of time interval, carries the > implication that GPS is not invulnerable. If that's true, people may > wonder what else needs a backup, like navigation? Electric grid > synchronization? Phones? > >> What is our government doing? > > One man, one vote, (one time?). There are a lot more cheap Chinese > 'Atomic' clocks sold every day than timing receivers sold in a year. > Numbers count. > >> They appear to be the best friend Chinese manufacturers ever had! > > Certainly true, in The Donald's view. The US government plays checkers, > the Chinese and Japanese play Chess... to steal an analogy. > > US companies, driven by Wall Street quarter-over-quarter greed, think > about the next quarter; Asian companies think about the next few decades. > > The switch to HDTV was supposed to be a giant stimulus for the US > electronics industry, hence a US 'standard'. How did that work out? What > fraction of HDTVs are US made? > > YMMV, > > -John > > ============== > >> >> Ron >> >> -----Original Message----- >> From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On >> Behalf Of J. Forster >> Sent: Thursday, July 05, 2012 10:29 AM >> To: Discussion of precise time and frequency measurement >> Subject: Re: [time-nuts] HP 117/10509a... >> >> The only ones that will work are very recent designs. >> >> The HP 117 and Fluke 207 will not work. >> Many Spectracoms will not work. A few will. See their web site >> The Stanford 620 will not, I believe. Some models may. >> >> I posted a partial list some time ago. >> >> Apparently, NIST is working on a receiver and possibly a retrofit. When >> it >> will be available and how much it will cost is TBD. >> >> I suspect the 'retrofit' will be the receiver with a 60 kHz output >> added, >> nothing more, but don't know. >> >> Seems to me, we are down to one egg in one basket. :(( >> >> -John >> >> ================ >> >> >> >>> Dear Group, >>> >>> This thread just saved me from a prospective purchase of an HP 117. >>> >>> Now the big question. Which instruments in general will be affected by >>> the BPSK transition? I have been reading about Kinemetrics 60DC WWVB >>> receiver and clock. It appeals to me if I find one. Will other WWVB >>> instruments not designed specifically for phase comparisons be >>> affected for the WWVB signal modulation changes? Which kind of >>> instruments and interactions with WWVB should I avoid? >>> >>> Thank you. Your comments are surely welcome. >>> >>> Regards, >>> >>> >>> Edgardo Molina >>> Dirección IPTEL >>> >>> www.iptel.net.mx > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

JF

J. Forster

Thu, Jul 5, 2012 10:19 PM

From what I've read, the mods are to improve the Time of Day, not the Time

Interval accuracy.

In my location (MA) WWVB was never as good as LORAN-C because of
propagation issues.

-John

===============

Hi

The real question is weather the BPSK will help us get significantly
better accuracy out of WWVB or not. If it does, time marches on. If not -
total waste of effort.

DSP based low frequency receivers are pretty easy to make. You still will
need those antennas and preamps to make them work though. If I can get
Loran-C type accuracy out of WWVB with the new modulation, I'll certainly
build or buy a receiver.

Bob

>From what I've read, the mods are to improve the Time of Day, not the Time Interval accuracy. In my location (MA) WWVB was never as good as LORAN-C because of propagation issues. -John =============== > Hi > > The real question is weather the BPSK will help us get significantly > better accuracy out of WWVB or not. If it does, time marches on. If not - > total waste of effort. > > DSP based low frequency receivers are pretty easy to make. You still will > need those antennas and preamps to make them work though. If I can get > Loran-C type accuracy out of WWVB with the new modulation, I'll certainly > build or buy a receiver. > > Bob

BC

Bob Camp

Thu, Jul 5, 2012 10:50 PM

Hi

Propagation isn't going to change with modulation format, so that part will still be with us. I'm wondering if some fancy processing on the new code might have some advantages. It's not worth digging into until they have a final format though.

Bob

On Jul 5, 2012, at 6:19 PM, J. Forster wrote:

From what I've read, the mods are to improve the Time of Day, not the Time
Interval accuracy.

In my location (MA) WWVB was never as good as LORAN-C because of
propagation issues.

-John

===============

Hi

The real question is weather the BPSK will help us get significantly
better accuracy out of WWVB or not. If it does, time marches on. If not -
total waste of effort.

DSP based low frequency receivers are pretty easy to make. You still will
need those antennas and preamps to make them work though. If I can get
Loran-C type accuracy out of WWVB with the new modulation, I'll certainly
build or buy a receiver.

Bob

time-nuts mailing list -- time-nuts@febo.com
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Hi Propagation isn't going to change with modulation format, so that part will still be with us. I'm wondering if some fancy processing on the new code might have some advantages. It's not worth digging into until they have a final format though. Bob On Jul 5, 2012, at 6:19 PM, J. Forster wrote: > From what I've read, the mods are to improve the Time of Day, not the Time > Interval accuracy. > > In my location (MA) WWVB was never as good as LORAN-C because of > propagation issues. > > -John > > =============== > > >> Hi >> >> The real question is weather the BPSK will help us get significantly >> better accuracy out of WWVB or not. If it does, time marches on. If not - >> total waste of effort. >> >> DSP based low frequency receivers are pretty easy to make. You still will >> need those antennas and preamps to make them work though. If I can get >> Loran-C type accuracy out of WWVB with the new modulation, I'll certainly >> build or buy a receiver. >> >> Bob > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

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