Empathy List Archives

JK

Jürg Kögel

Sun, Feb 22, 2015 3:44 PM

Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years
ago. Both have been working for the last nine years. One did fail last year
and I finally got around to looking at it in the last two weeks. The
attached picture shows the trauma to the lamp board. I do not understand
the corrosion since it has been in a very controlled environment in my
basement.

Since the failed unit does have the 1 pps loop control I moved the
processor board to the still working unit. Did not work. Does it take more
than just moving that one board to get 1 pps loop control?

Second any ideas as to what may have happened to the lamp heater board. Any
recommendations? Plan on making a replacement board. Have a power FET MRF134

Thanks

Juerg

Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years ago. Both have been working for the last nine years. One did fail last year and I finally got around to looking at it in the last two weeks. The attached picture shows the trauma to the lamp board. I do not understand the corrosion since it has been in a very controlled environment in my basement. Since the failed unit does have the 1 pps loop control I moved the processor board to the still working unit. Did not work. Does it take more than just moving that one board to get 1 pps loop control? Second any ideas as to what may have happened to the lamp heater board. Any recommendations? Plan on making a replacement board. Have a power FET MRF134 Thanks Juerg

GR

Götz Romahn

Sun, Feb 22, 2015 4:33 PM

@Juerg,
try swapping the lamp module. This worked with my two PRS10
Goetz

Am 22.02.2015 um 16:44 schrieb Jürg Kögel:

Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years
ago. Both have been working for the last nine years. One did fail last year
and I finally got around to looking at it in the last two weeks. The
attached picture shows the trauma to the lamp board. I do not understand
the corrosion since it has been in a very controlled environment in my
basement.

Since the failed unit does have the 1 pps loop control I moved the
processor board to the still working unit. Did not work. Does it take more
than just moving that one board to get 1 pps loop control?

Second any ideas as to what may have happened to the lamp heater board. Any
recommendations? Plan on making a replacement board. Have a power FET MRF134

Thanks

Juerg

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.

@Juerg, try swapping the lamp module. This worked with my two PRS10 Goetz Am 22.02.2015 um 16:44 schrieb Jürg Kögel: > Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years > ago. Both have been working for the last nine years. One did fail last year > and I finally got around to looking at it in the last two weeks. The > attached picture shows the trauma to the lamp board. I do not understand > the corrosion since it has been in a very controlled environment in my > basement. > > Since the failed unit does have the 1 pps loop control I moved the > processor board to the still working unit. Did not work. Does it take more > than just moving that one board to get 1 pps loop control? > > Second any ideas as to what may have happened to the lamp heater board. Any > recommendations? Plan on making a replacement board. Have a power FET MRF134 > > Thanks > > > > Juerg > > > _______________________________________________ > 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.

JL

J. L. Trantham

Sun, Feb 22, 2015 5:37 PM

Did the oven 'controller' fail and 'over cook' the lamp?

Sort of looks like what happened to my 5065A when the heater turned on and never turned off.

Joe

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Jürg Kögel
Sent: Sunday, February 22, 2015 9:44 AM
To: Discussion of precise time and frequency measurement
Subject: [Bulk] [time-nuts] PRS10 Rubidium

Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years ago. Both have been working for the last nine years. One did fail last year and I finally got around to looking at it in the last two weeks. The attached picture shows the trauma to the lamp board. I do not understand the corrosion since it has been in a very controlled environment in my basement.

Since the failed unit does have the 1 pps loop control I moved the processor board to the still working unit. Did not work. Does it take more than just moving that one board to get 1 pps loop control?

Second any ideas as to what may have happened to the lamp heater board. Any recommendations? Plan on making a replacement board. Have a power FET MRF134

Thanks

Juerg

Did the oven 'controller' fail and 'over cook' the lamp? Sort of looks like what happened to my 5065A when the heater turned on and never turned off. Joe -----Original Message----- From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Jürg Kögel Sent: Sunday, February 22, 2015 9:44 AM To: Discussion of precise time and frequency measurement Subject: [Bulk] [time-nuts] PRS10 Rubidium Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years ago. Both have been working for the last nine years. One did fail last year and I finally got around to looking at it in the last two weeks. The attached picture shows the trauma to the lamp board. I do not understand the corrosion since it has been in a very controlled environment in my basement. Since the failed unit does have the 1 pps loop control I moved the processor board to the still working unit. Did not work. Does it take more than just moving that one board to get 1 pps loop control? Second any ideas as to what may have happened to the lamp heater board. Any recommendations? Plan on making a replacement board. Have a power FET MRF134 Thanks Juerg

HH

Hans Holzach

Sun, Feb 22, 2015 7:57 PM

hi jürg,

dispite the fact that my prs-10 has been up and running for only about 2
years (according to FC!?), the lamp assembly looks pretty ugly (see
picture) as if it was overheated quite a bit. i bought the unit from
ebay, so i have no idea under what conditions it had spent its life
before i got it. the unit works, but the frequency is not as stable as i
expected.

https://farm9.staticflickr.com/8652/16589402796_3a2e1e66c9_o.jpg

in my opinion the breakout board should work with your second unit. but
you have to enable the pps PLL (instruction is: PL1). check the manual,
page 33 ff., also to set the time constant.

regards,
hans

Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years
ago. Both have been working for the last nine years. One did fail last year
and I finally got around to looking at it in the last two weeks. The
attached picture shows the trauma to the lamp board. I do not understand
the corrosion since it has been in a very controlled environment in my
basement.

Since the failed unit does have the 1 pps loop control I moved the
processor board to the still working unit. Did not work. Does it take more
than just moving that one board to get 1 pps loop control?

Second any ideas as to what may have happened to the lamp heater board. Any
recommendations? Plan on making a replacement board. Have a power FET MRF134

Thanks

hi jürg, dispite the fact that my prs-10 has been up and running for only about 2 years (according to FC!?), the lamp assembly looks pretty ugly (see picture) as if it was overheated quite a bit. i bought the unit from ebay, so i have no idea under what conditions it had spent its life before i got it. the unit works, but the frequency is not as stable as i expected. https://farm9.staticflickr.com/8652/16589402796_3a2e1e66c9_o.jpg in my opinion the breakout board should work with your second unit. but you have to enable the pps PLL (instruction is: PL1). check the manual, page 33 ff., also to set the time constant. regards, hans Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years ago. Both have been working for the last nine years. One did fail last year and I finally got around to looking at it in the last two weeks. The attached picture shows the trauma to the lamp board. I do not understand the corrosion since it has been in a very controlled environment in my basement. Since the failed unit does have the 1 pps loop control I moved the processor board to the still working unit. Did not work. Does it take more than just moving that one board to get 1 pps loop control? Second any ideas as to what may have happened to the lamp heater board. Any recommendations? Plan on making a replacement board. Have a power FET MRF134 Thanks

DC

David C. Partridge

Sun, Feb 22, 2015 8:45 PM

Hmmm is it possible that a nearby board had a wet tantalum capacitor (H2SO4 electrolyte) that failed spraying acid?

Dave
-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Jürg Kögel
Sent: 22 February 2015 15:44
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] PRS10 Rubidium

I do not understand the corrosion since it has been in a very controlled environment in my basement.

Hmmm is it possible that a nearby board had a wet tantalum capacitor (H2SO4 electrolyte) that failed spraying acid? Dave -----Original Message----- From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Jürg Kögel Sent: 22 February 2015 15:44 To: Discussion of precise time and frequency measurement Subject: [time-nuts] PRS10 Rubidium >I do not understand the corrosion since it has been in a very controlled environment in my basement.

PS

paul swed

Sun, Feb 22, 2015 8:46 PM

I will speculate the only thing that can release something that would
carrode like that is the tantalum cap on the right. The resistor thats
standing up is simply on some form of insulated standoff?
Regards
Paul
WB8TSL

On Sun, Feb 22, 2015 at 10:44 AM, Jürg Kögel j.koegel5@gmail.com wrote:

Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years
ago. Both have been working for the last nine years. One did fail last year
and I finally got around to looking at it in the last two weeks. The
attached picture shows the trauma to the lamp board. I do not understand
the corrosion since it has been in a very controlled environment in my
basement.

Since the failed unit does have the 1 pps loop control I moved the
processor board to the still working unit. Did not work. Does it take more
than just moving that one board to get 1 pps loop control?

Second any ideas as to what may have happened to the lamp heater board. Any
recommendations? Plan on making a replacement board. Have a power FET
MRF134

Thanks

Juerg

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 speculate the only thing that can release something that would carrode like that is the tantalum cap on the right. The resistor thats standing up is simply on some form of insulated standoff? Regards Paul WB8TSL On Sun, Feb 22, 2015 at 10:44 AM, Jürg Kögel <j.koegel5@gmail.com> wrote: > Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years > ago. Both have been working for the last nine years. One did fail last year > and I finally got around to looking at it in the last two weeks. The > attached picture shows the trauma to the lamp board. I do not understand > the corrosion since it has been in a very controlled environment in my > basement. > > Since the failed unit does have the 1 pps loop control I moved the > processor board to the still working unit. Did not work. Does it take more > than just moving that one board to get 1 pps loop control? > > Second any ideas as to what may have happened to the lamp heater board. Any > recommendations? Plan on making a replacement board. Have a power FET > MRF134 > > Thanks > > > > Juerg > > _______________________________________________ > 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. >

PS

paul swed

Sun, Feb 22, 2015 9:02 PM

Interesting so it looks like what ever the standoff material is out gassing.
Regards
Paul
WB8TSL

On Sun, Feb 22, 2015 at 2:57 PM, Hans Holzach hans.holzach@gmail.com
wrote:

hi jürg,

dispite the fact that my prs-10 has been up and running for only about 2
years (according to FC!?), the lamp assembly looks pretty ugly (see
picture) as if it was overheated quite a bit. i bought the unit from ebay,
so i have no idea under what conditions it had spent its life before i got
it. the unit works, but the frequency is not as stable as i expected.

https://farm9.staticflickr.com/8652/16589402796_3a2e1e66c9_o.jpg

in my opinion the breakout board should work with your second unit. but
you have to enable the pps PLL (instruction is: PL1). check the manual,
page 33 ff., also to set the time constant.

regards,
hans

Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years
ago. Both have been working for the last nine years. One did fail last year
and I finally got around to looking at it in the last two weeks. The
attached picture shows the trauma to the lamp board. I do not understand
the corrosion since it has been in a very controlled environment in my
basement.

Since the failed unit does have the 1 pps loop control I moved the
processor board to the still working unit. Did not work. Does it take more
than just moving that one board to get 1 pps loop control?

Second any ideas as to what may have happened to the lamp heater board. Any
recommendations? Plan on making a replacement board. Have a power FET
MRF134

Thanks

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.

Interesting so it looks like what ever the standoff material is out gassing. Regards Paul WB8TSL On Sun, Feb 22, 2015 at 2:57 PM, Hans Holzach <hans.holzach@gmail.com> wrote: > hi jürg, > > dispite the fact that my prs-10 has been up and running for only about 2 > years (according to FC!?), the lamp assembly looks pretty ugly (see > picture) as if it was overheated quite a bit. i bought the unit from ebay, > so i have no idea under what conditions it had spent its life before i got > it. the unit works, but the frequency is not as stable as i expected. > > https://farm9.staticflickr.com/8652/16589402796_3a2e1e66c9_o.jpg > > in my opinion the breakout board should work with your second unit. but > you have to enable the pps PLL (instruction is: PL1). check the manual, > page 33 ff., also to set the time constant. > > regards, > hans > > > > > > > Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years > ago. Both have been working for the last nine years. One did fail last year > and I finally got around to looking at it in the last two weeks. The > attached picture shows the trauma to the lamp board. I do not understand > the corrosion since it has been in a very controlled environment in my > basement. > > Since the failed unit does have the 1 pps loop control I moved the > processor board to the still working unit. Did not work. Does it take more > than just moving that one board to get 1 pps loop control? > > Second any ideas as to what may have happened to the lamp heater board. Any > recommendations? Plan on making a replacement board. Have a power FET > MRF134 > > Thanks > > > _______________________________________________ > 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

Brooke Clarke

Sun, Feb 22, 2015 10:50 PM

Hi Juerg:

Is it possible you've got a leaking capacitor?

Mail_Attachment --
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
http://www.prc68.com/I/DietNutrition.html
Jürg Kögel wrote:

Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years
ago. Both have been working for the last nine years. One did fail last year
and I finally got around to looking at it in the last two weeks. The
attached picture shows the trauma to the lamp board. I do not understand
the corrosion since it has been in a very controlled environment in my
basement.

Since the failed unit does have the 1 pps loop control I moved the
processor board to the still working unit. Did not work. Does it take more
than just moving that one board to get 1 pps loop control?

Second any ideas as to what may have happened to the lamp heater board. Any
recommendations? Plan on making a replacement board. Have a power FET MRF134

Thanks

Juerg

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 Juerg: Is it possible you've got a leaking capacitor? Mail_Attachment -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html http://www.prc68.com/I/DietNutrition.html Jürg Kögel wrote: > Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years > ago. Both have been working for the last nine years. One did fail last year > and I finally got around to looking at it in the last two weeks. The > attached picture shows the trauma to the lamp board. I do not understand > the corrosion since it has been in a very controlled environment in my > basement. > > Since the failed unit does have the 1 pps loop control I moved the > processor board to the still working unit. Did not work. Does it take more > than just moving that one board to get 1 pps loop control? > > Second any ideas as to what may have happened to the lamp heater board. Any > recommendations? Plan on making a replacement board. Have a power FET MRF134 > > Thanks > > > > Juerg > > > _______________________________________________ > 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.

B_

Bryan _

Mon, Feb 23, 2015 2:12 AM

The repair guide for the Efratom LRPO 101 on the K04BB website recommends all the tantalums be replaced.

http://www.ko4bb.com/manuals/index.php?dir=02_GPS_Timing/Efratom

-=Bryan=-

Date: Sun, 22 Feb 2015 16:44:06 +0100
From: j.koegel5@gmail.com
To: time-nuts@febo.com
Subject: [time-nuts] PRS10 Rubidium

Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years
ago. Both have been working for the last nine years. One did fail last year
and I finally got around to looking at it in the last two weeks. The
attached picture shows the trauma to the lamp board. I do not understand
the corrosion since it has been in a very controlled environment in my
basement.

Since the failed unit does have the 1 pps loop control I moved the
processor board to the still working unit. Did not work. Does it take more
than just moving that one board to get 1 pps loop control?

Second any ideas as to what may have happened to the lamp heater board. Any
recommendations? Plan on making a replacement board. Have a power FET MRF134

Thanks

Juerg

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 repair guide for the Efratom LRPO 101 on the K04BB website recommends all the tantalums be replaced. http://www.ko4bb.com/manuals/index.php?dir=02_GPS_Timing/Efratom -=Bryan=- Date: Sun, 22 Feb 2015 16:44:06 +0100 From: j.koegel5@gmail.com To: time-nuts@febo.com Subject: [time-nuts] PRS10 Rubidium Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years ago. Both have been working for the last nine years. One did fail last year and I finally got around to looking at it in the last two weeks. The attached picture shows the trauma to the lamp board. I do not understand the corrosion since it has been in a very controlled environment in my basement. Since the failed unit does have the 1 pps loop control I moved the processor board to the still working unit. Did not work. Does it take more than just moving that one board to get 1 pps loop control? Second any ideas as to what may have happened to the lamp heater board. Any recommendations? Plan on making a replacement board. Have a power FET MRF134 Thanks Juerg _______________________________________________ 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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PRS10 Rubidium