Re: [time-nuts] PRS10 C900 replacement

Hi Some form of base cooling is needed on all of these surplus telecom Rb’s to keep them from an early death. A great big heatsink could do it. A small quiet fan and a small heatsink will do it. A somewhat larger fan and no heatsink will also do the job. Any fan mount should consider the

Re: [time-nuts] PRS10 C900 replacement

Hi All, I used the TAP225K035SRW, from Mouser, and have the PRS10 running again. In the process of pulling it apart I managed to break one of the glass thermistors (Mouser replacement from US Sensor, part number 104JG1F). Doh. Whether it was the lamp temperature change (thermistor) or

Re: [time-nuts] PRS10 C900 replacement

Hi Tantalums can benefit from a 1K resistor sort of “rebuild”. On any part made in the last 30 years by a major outfit, it should not be required. Moisture is sort of a weird issue. Epoxy and humidity do strange things. Getting it back out is not easy. It also combines with the “guts” of the

Re: [time-nuts] PRS10 C900 replacement

On Tue, 19 Jan 2016 20:44:15 -0600 "Graham / KE9H" wrote: > You will need to know the capacitance value. Usually expressed in uF > (micro Farad). > Then some idea of the physical size, so the replacement will fit in the > current space. According to the schematics sheet

Re: [time-nuts] PRS10 C900 replacement

Do tantalum then benefit from being 'reformed' in a similar fashion to wet electrolytics? Do they recover from moisture ingress by baking in a similar fashion to SMD chips that have been stored incorrectly? On 20 Jan 2016 14:10, "Bob Camp" wrote: > Hi > > > The only thing I

Re: [time-nuts] PRS10 C900 replacement

david wrote: It's a 2.2uF cap, with a 0.125" lead spacing, and I'm looking for 125dC temp rating. I wondered if there were other characteristics such as ESR/ESL I need to keep in mind. You're on the right track. Get the highest temperature rating available (which is probably 125C), buy

Re: [time-nuts] PRS10 C900 replacement

Hi The only thing I would add to that is: Get it from Mouser or Digi-Key. That way you have a pretty good chance of it being one that really came from the manufacturer you think it’s coming from. You also are a lot less likely to get one that has been on the shelf forever and ever. One

[time-nuts] PRS10 C900 replacement

Hi All, While still appearing to function normally, my PRS10 started to smell: C900 in the lamp assembly has self destructed. The SRS parts manual merely says "Capacitor, Tantalum, 35V, 20%, Rad", so I'd appreciate any advice on what additional parameters I should be looking at in selecting

Re: [time-nuts] PRS10 C900 replacement

You will need to know the capacitance value. Usually expressed in uF (micro Farad). Then some idea of the physical size, so the replacement will fit in the current space. --- Graham == On Tue, Jan 19, 2016 at 4:21 PM, davidh wrote: > Hi All, > > While still appearing to

Re: [time-nuts] PRS10 C900 replacement

renovating a Tek 475 'scope. Regards Dan (A newbie from Denmark) -Oprindelig meddelelse- From: davidh Sent: Tuesday, January 19, 2016 11:21 PM To: time-nuts@febo.com Subject: [time-nuts] PRS10 C900 replacement Hi All, While still appearing to function normally, my PRS10 started to smell

Re: [time-nuts] PRS10 C900 replacement

nmark) -Oprindelig meddelelse- From: davidh Sent: Tuesday, January 19, 2016 11:21 PM To: time-nuts-jsktletq...@public.gmane.org Subject: [time-nuts] PRS10 C900 replacement Hi All, While still appearing to function normally, my PRS10 started to smell: C900 in the lamp assembly has self destr