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gonzo moto

Tue, Oct 27, 2009 3:18 PM

I've just replaced a Solartron 7150+ with another the same.
The new unit is low hours ex-MOD. It was last calibrated in 2004 and probably hasn't seen the light of day since.

So (thinks I), I'll just have a play before I strip the filter for a rebuild.

15 minutes is all it took for the signature ffffffzzt pop of the filter letting go.

It has (to say the least), forced the issue.

Now I've removed all the solder around the earth pin, but I still can't get the cover off.
Does it just require brute force to pull it off or there something else holding it on?

ian

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I've just replaced a Solartron 7150+ with another the same. The new unit is low hours ex-MOD. It was last calibrated in 2004 and probably hasn't seen the light of day since. So (thinks I), I'll just have a play before I strip the filter for a rebuild. 15 minutes is all it took for the signature ffffffzzt pop of the filter letting go. It has (to say the least), forced the issue. Now I've removed all the solder around the earth pin, but I still can't get the cover off. Does it just require brute force to pull it off or there something else holding it on? ian _________________________________________________________________ Need a place to rent, buy or share? Let us find your next place for you! http://clk.atdmt.com/NMN/go/157631292/direct/01/

RA

Robert Atkinson

Tue, Oct 27, 2009 6:20 PM

Hi Ian,
never taken an FN372 apart, not really worth it as they are about £25 from RS components. Most filters are epoxy potted so I think you will have to use a lot of brute force to open it up and then break up the epoxy.

Robert G8RPI.

--- On Tue, 27/10/09, gonzo moto cadbloke@hotmail.com wrote:

From: gonzo moto cadbloke@hotmail.com
Subject: Re: [time-nuts] 7150+ filter problem
To: "time-nuts" time-nuts@febo.com
Date: Tuesday, 27 October, 2009, 15:18

I've just replaced a Solartron 7150+ with another the same.
The new unit is low hours ex-MOD. It was last calibrated in 2004 and probably hasn't seen the light of day since.

So (thinks I), I'll just have a play before I strip the filter for a rebuild.

15 minutes is all it took for the signature ffffffzzt pop of the filter letting go.

It has (to say the least), forced the issue.

Now I've removed all the solder around the earth pin, but I still can't get the cover off.
Does it just require brute force to pull it off or there something else holding it on?

ian

Need a place to rent, buy or share? Let us find your next place for you!
http://clk.atdmt.com/NMN/go/157631292/direct/01/

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and follow the instructions there.

Hi Ian, never taken an FN372 apart, not really worth it as they are about £25 from RS components. Most filters are epoxy potted so I think you will have to use a lot of brute force to open it up and then break up the epoxy. Robert G8RPI. --- On Tue, 27/10/09, gonzo moto <cadbloke@hotmail.com> wrote: From: gonzo moto <cadbloke@hotmail.com> Subject: Re: [time-nuts] 7150+ filter problem To: "time-nuts" <time-nuts@febo.com> Date: Tuesday, 27 October, 2009, 15:18 I've just replaced a Solartron 7150+ with another the same. The new unit is low hours ex-MOD. It was last calibrated in 2004 and probably hasn't seen the light of day since. So (thinks I), I'll just have a play before I strip the filter for a rebuild. 15 minutes is all it took for the signature ffffffzzt pop of the filter letting go. It has (to say the least), forced the issue. Now I've removed all the solder around the earth pin, but I still can't get the cover off. Does it just require brute force to pull it off or there something else holding it on? ian _________________________________________________________________ Need a place to rent, buy or share? Let us find your next place for you! http://clk.atdmt.com/NMN/go/157631292/direct/01/ _______________________________________________ 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.

MI

Marco IK1ODO

Tue, Oct 27, 2009 7:40 PM

Anyone knows of a commercially available 10 MHz -> 1pps divider
chain, built or in kit form?
I know that it may be very simple or not, depending from
implementations. A desirable feature would be the ability to sync the
pps output to a reference pps at the start of a measurement cycle.
Easy to design, but I don't want to reinvent the wheel here...

73 - Marco IK1ODO

Anyone knows of a commercially available 10 MHz -> 1pps divider chain, built or in kit form? I know that it may be very simple or not, depending from implementations. A desirable feature would be the ability to sync the pps output to a reference pps at the start of a measurement cycle. Easy to design, but I don't want to reinvent the wheel here... 73 - Marco IK1ODO

JA

John Ackermann N8UR

Tue, Oct 27, 2009 8:46 PM

Check out the TADD-2 which does just that --
http://www.tapr.org/kits_tadd-2.html

John

Marco IK1ODO said the following on 10/27/2009 03:40 PM:

Anyone knows of a commercially available 10 MHz -> 1pps divider chain,
built or in kit form?
I know that it may be very simple or not, depending from
implementations. A desirable feature would be the ability to sync the
pps output to a reference pps at the start of a measurement cycle.
Easy to design, but I don't want to reinvent the wheel here...

73 - Marco IK1ODO

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.

Check out the TADD-2 which does just that -- http://www.tapr.org/kits_tadd-2.html John ---- Marco IK1ODO said the following on 10/27/2009 03:40 PM: > Anyone knows of a commercially available 10 MHz -> 1pps divider chain, > built or in kit form? > I know that it may be very simple or not, depending from > implementations. A desirable feature would be the ability to sync the > pps output to a reference pps at the start of a measurement cycle. > Easy to design, but I don't want to reinvent the wheel here... > > 73 - Marco IK1ODO > > > _______________________________________________ > 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.

MI

Marco IK1ODO

Tue, Oct 27, 2009 9:12 PM

At 21.46 27/10/2009, you wrote:

Check out the TADD-2 which does just that --
http://www.tapr.org/kits_tadd-2.html

John

Hello John,

probably the TADD-2 will be just fine. I'm studying the manual.
Thanks for info!

Marco IK1ODO

At 21.46 27/10/2009, you wrote: >Check out the TADD-2 which does just that -- >http://www.tapr.org/kits_tadd-2.html > >John Hello John, probably the TADD-2 will be just fine. I'm studying the manual. Thanks for info! Marco IK1ODO

A

AL1

Tue, Oct 27, 2009 11:50 PM

Hi Marco,

try TVB divider at :
http://www.prc68.com/I/PRC68COM.shtml#TVB
73
Alain F4GBC

----- Original Message -----
From: "Marco IK1ODO" ik1odo@spin-it.com
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Tuesday, October 27, 2009 8:40 PM
Subject: [time-nuts] 10 MHz -> 1 pps divider?

Anyone knows of a commercially available 10 MHz -> 1pps divider chain,
built or in kit form?
I know that it may be very simple or not, depending from implementations.
A desirable feature would be the ability to sync the pps output to a
reference pps at the start of a measurement cycle.
Easy to design, but I don't want to reinvent the wheel here...

73 - Marco IK1ODO

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 Marco, try TVB divider at : http://www.prc68.com/I/PRC68COM.shtml#TVB 73 Alain F4GBC ----- Original Message ----- From: "Marco IK1ODO" <ik1odo@spin-it.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Tuesday, October 27, 2009 8:40 PM Subject: [time-nuts] 10 MHz -> 1 pps divider? > > Anyone knows of a commercially available 10 MHz -> 1pps divider chain, > built or in kit form? > I know that it may be very simple or not, depending from implementations. > A desirable feature would be the ability to sync the pps output to a > reference pps at the start of a measurement cycle. > Easy to design, but I don't want to reinvent the wheel here... > > 73 - Marco IK1ODO > > > _______________________________________________ > 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. >

RD

Robert Darlington

Wed, Oct 28, 2009 1:47 AM

I will be coming out with a TVB divider in about two months. Basically, a
board, the PIC, some connectors, and an aluminum enclosure. Nothing
terribly fancy, but definitely priced right. Also, just an FYI, I've got
Tom's blessing on using his code. I'm considering offering a kit but it
will be 90% surface mount and not everybody likes that. I'm thinking
somewhere right around $50.00 with SMA connectors for all of the standard
inputs and outputs, and possibly offering it without the case. Any thoughts
on this?

On Tue, Oct 27, 2009 at 1:40 PM, Marco IK1ODO ik1odo@spin-it.com wrote:

Anyone knows of a commercially available 10 MHz -> 1pps divider chain,
built or in kit form?
I know that it may be very simple or not, depending from implementations. A
desirable feature would be the ability to sync the pps output to a reference
pps at the start of a measurement cycle.
Easy to design, but I don't want to reinvent the wheel here...

73 - Marco IK1ODO

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.

I will be coming out with a TVB divider in about two months. Basically, a board, the PIC, some connectors, and an aluminum enclosure. Nothing terribly fancy, but definitely priced right. Also, just an FYI, I've got Tom's blessing on using his code. I'm considering offering a kit but it will be 90% surface mount and not everybody likes that. I'm thinking somewhere right around $50.00 with SMA connectors for all of the standard inputs and outputs, and possibly offering it without the case. Any thoughts on this? On Tue, Oct 27, 2009 at 1:40 PM, Marco IK1ODO <ik1odo@spin-it.com> wrote: > Anyone knows of a commercially available 10 MHz -> 1pps divider chain, > built or in kit form? > I know that it may be very simple or not, depending from implementations. A > desirable feature would be the ability to sync the pps output to a reference > pps at the start of a measurement cycle. > Easy to design, but I don't want to reinvent the wheel here... > > 73 - Marco IK1ODO > > > _______________________________________________ > 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. >

RP

Roy Phillips

Wed, Oct 28, 2009 1:12 PM

Robert
I would be very interested, and would prefer to have the "without case "
version'
Thanks
Roy

----- Original Message -----
From: "Robert Darlington" rdarlington@gmail.com
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Wednesday, October 28, 2009 1:47 AM
Subject: Re: [time-nuts] 10 MHz -> 1 pps divider?

I will be coming out with a TVB divider in about two months. Basically, a
board, the PIC, some connectors, and an aluminum enclosure. Nothing
terribly fancy, but definitely priced right. Also, just an FYI, I've got
Tom's blessing on using his code. I'm considering offering a kit but it
will be 90% surface mount and not everybody likes that. I'm thinking
somewhere right around $50.00 with SMA connectors for all of the standard
inputs and outputs, and possibly offering it without the case. Any
thoughts
on this?

On Tue, Oct 27, 2009 at 1:40 PM, Marco IK1ODO ik1odo@spin-it.com wrote:

Anyone knows of a commercially available 10 MHz -> 1pps divider chain,
built or in kit form?
I know that it may be very simple or not, depending from implementations.
A
desirable feature would be the ability to sync the pps output to a
reference
pps at the start of a measurement cycle.
Easy to design, but I don't want to reinvent the wheel here...

73 - Marco IK1ODO

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.

Robert I would be very interested, and would prefer to have the "without case " version' Thanks Roy ----- Original Message ----- From: "Robert Darlington" <rdarlington@gmail.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Wednesday, October 28, 2009 1:47 AM Subject: Re: [time-nuts] 10 MHz -> 1 pps divider? >I will be coming out with a TVB divider in about two months. Basically, a > board, the PIC, some connectors, and an aluminum enclosure. Nothing > terribly fancy, but definitely priced right. Also, just an FYI, I've got > Tom's blessing on using his code. I'm considering offering a kit but it > will be 90% surface mount and not everybody likes that. I'm thinking > somewhere right around $50.00 with SMA connectors for all of the standard > inputs and outputs, and possibly offering it without the case. Any > thoughts > on this? > > > > On Tue, Oct 27, 2009 at 1:40 PM, Marco IK1ODO <ik1odo@spin-it.com> wrote: > >> Anyone knows of a commercially available 10 MHz -> 1pps divider chain, >> built or in kit form? >> I know that it may be very simple or not, depending from implementations. >> A >> desirable feature would be the ability to sync the pps output to a >> reference >> pps at the start of a measurement cycle. >> Easy to design, but I don't want to reinvent the wheel here... >> >> 73 - Marco IK1ODO >> >> >> _______________________________________________ >> 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@lists.febo.com

Re: [time-nuts] 7150+ filter problem

John