Like always they have them on ebay. I know most of you do not like them but they are for me the best source of obsolete parts. Bert In a message dated 2/16/2011 4:57:45 P.M. Eastern Standard Time, li...@rtty.us writes:
Hi Since the unit is current production, the part should be around. There are a number of the old Motorola RF parts that are very hard to find. They have been out of the RF business for quite a while. That should not be one of them. Based on a quick search, M/A-Com seems to make them. $20.95 at RF Parts. There may be other sources as well. Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: Wednesday, February 16, 2011 4:31 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] SRS PRS10 problem Well a couple answers. If those are RB whiskers try the heat gun at 300 degrees on it for 15 minutes. As Magnus suggests and I just tried for the first time. It actually worked and I recovered the rb lamp. I imagine the transistor may be hard to get but its a motorola should be obtainable. Good luck Regards Paul WB8TSL On Wed, Feb 16, 2011 at 4:19 PM, Pete Lancashire <p...@petelancashire.com>wrote: > write a letter (real one) to their ceo & pres and if there is a > engineering VP, only cost you a buck, fifty. > > sometimes works > > -pete > > On Wed, Feb 16, 2011 at 12:11 PM, Brendan Minish > <ei6iz.bren...@gmail.com> wrote: > > Right, to follow up on my own email > > > > I took it apart > > The lamp assembly has failed. > > > > In the PRS10 the lamp is exited by a strong RF field @ 150Mhz > > this is generated by an MRF134 within the lamp package > > > > The failure mode was caused by the growth of a substantial tin whisker > > within the lamp assembly which appears to have killed the MRF134. > > > > I made contact with SRS about purchasing a replacement lamp assembly but > > since I bought it on the used market they are not willing sell me a > > replacement lamp assembly. Frankly I am not terribly impressed with their > > response on this. > > > > Does anyone on list have a 'donor' PRS10 that might have a good lamp > > assembly that they would be willing to sell me ? > > Perhaps someone on list has a commercial relationship with SRS and might > be > > able to assist me with purchasing it? > > > > Hoping someone can help out, My alternative is to attempt to source an > > MRF134 and have a go at replacing it but there may be other damage in > there > > > > regards > > Brendan > > > > > > > > On 14/02/2011 18:53, Brendan Minish wrote: > >> > >> Hello all > >> > >> My SRS PRS10 ( http://www.thinksrs.com/products/PRS10.htm ) Rubidum > >> frequency standard was power cycled a few days ago, since then it has > >> not achived rubidium lock. > >> I have tried a full rest and also further power cycles with no joy. > >> > >> The SRS RS232 application reports the following parameters that 'look > >> wrong' > >> ad3 (lamp drain ) 2.001 > >> sd2 (fet voltage set ) 255 > >> > >> ad3 at 2 (Lamp drain volatge 20V) would appear to correspond with the Rb > >> lamp discharge not beginning > >> > >> this unit is of course out of guarantee and came to me via Ebay about 5 > >> years ago, is anyone on list familiar with troubleshooting these units > >> who Might have some general ideas of how best to proceed with repairing > >> the unit > >> > >> > > > > > > -- > > 73 > > Brendan EI6IZ > > > > _______________________________________________ > > 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. _______________________________________________ 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.