Re: [time-nuts] PRS10 rubidium lamp module failure

Follow-up: as several time-nuts noted, there was a lot of corrosion on parts of the lamp module. Oddly, there was no corrosion on the rest of the PRS10, or on the TS2500 which it came out of. The resistor lead was severely oxidized and partly melted. It's possible that the inductance of the

Re: [time-nuts] PRS10 rubidium lamp module failure

, 2016 1:06 AM Subject: [time-nuts] PRS10 rubidium lamp module failure ..."apparently got hot enough to create a localized thermal runaway in its lead wire." I don't think that explanation is correct. There are no signs of discoloration caused by overheating anywhere else in the

Re: [time-nuts] PRS10 rubidium lamp module failure

On Mon, 9 May 2016 15:47:06 -0700 Stewart Cobb wrote: > A half-melted bit of wire fell > away before I could take the picture. Without that heater working, the > lamp is apparently too cold to start. This looks more like it corroded away than melted. Though, it's a bit

[time-nuts] PRS10 rubidium lamp module failure

..."apparently got hot enough to create a localized thermal runaway in its lead wire." I don't think that explanation is correct. There are no signs of discoloration caused by overheating anywhere else in the photo and yet the lead wire has apparently melted as you say. That would probably

Re: [time-nuts] PRS10 rubidium lamp module failure

Hi, I had the same problem a few years ago. What kind of advice are your searching for to that "usual" failure? Regards, VS - Original Message - From: "Stewart Cobb" <stewart.c...@gmail.com> To: <time-nuts@febo.com> Sent: Monday, May 09, 2016 11:

[time-nuts] PRS10 rubidium lamp module failure

R901, on the far right, is shown on the schematic as "air heater". It apparently got hot enough to create a localized thermal runaway in its lead wire. There was ample evidence of arcing. A half-melted bit of wire fell away before I could take the picture. Without that heater working, the lamp is

[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

Re: [time-nuts] PRS10 Rubidium

@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

Re: [time-nuts] PRS10 Rubidium

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

Re: [time-nuts] PRS10 Rubidium

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.koeg...@gmail.com wrote:

Re: [time-nuts] PRS10 Rubidium

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.holz...@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

Re: [time-nuts] PRS10 Rubidium

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. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin

Re: [time-nuts] PRS10 Rubidium

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

Re: [time-nuts] PRS10 Rubidium

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.koeg...@gmail.com To: time-nuts@febo.com Subject: [time-nuts

Re: [time-nuts] PRS10 rubidium on eBay

Yep, that's the one, Corby. I'll let Bill know you're not interested. John -- Original Message -- From: cdel...@juno.com To: time-nuts@febo.com Subject: [time-nuts] PRS10 rubidium on eBay Date: Sat, 10 May 2014 12:52:20 -0700 John, I believe that the unit referred

Re: [time-nuts] PRS10 rubidium on eBay

Corby, It would be nice to have included the eBay item number. BillWB6BNQ cdel...@juno.com wrote: Hi, I'm selling a nice PRS10 on eBay if anyone is interested. With manual and schematics. Works great! Cheers, Corby Dawson ___ time-nuts

Re: [time-nuts] PRS10 rubidium on eBay

- Original Message - From: wb6bnq wb6...@cox.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, May 09, 2014 11:50 PM Subject: Re: [time-nuts] PRS10 rubidium on eBay Corby, It would be nice to have included the eBay item number. BillWB6BNQ cdel

Re: [time-nuts] PRS10 rubidium on eBay

On 10 May 2014 11:01, Tom Van Baak t...@leapsecond.com wrote: Hi Bill, eBay has a search bar. If you type PRS10 Rubidium it will locate Corby's item and possibly other similar items. I rarely use eBay's search tool now, since I found http://www.geo-ship.com/ as it is much better at

Re: [time-nuts] PRS10 rubidium on eBay

Message -- From: cdel...@juno.com To: time-nuts@febo.com Subject: [time-nuts] PRS10 rubidium on eBay Date: Fri, 9 May 2014 21:22:34 -0700 Hi, I'm selling a nice PRS10 on eBay if anyone is interested. With manual and schematics. Works great! Cheers, Corby Dawson

[time-nuts] PRS10 rubidium on eBay

John, I believe that the unit referred to is a Tracor 308A. I no longer look to play with the Tracor units (304 308 600 900) as their performance does not merit putting a lot of work into them. Thanks for the heads up however! The eBay # for the PRS10 is 321402060170 Corby

[time-nuts] PRS10 rubidium on eBay

Hi, I'm selling a nice PRS10 on eBay if anyone is interested. With manual and schematics. Works great! Cheers, Corby Dawson ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to