With some humor as I looked inside my egg I had replaced the caps also. So it is a common failure. Also note the chip is not a micro but an array or at least a state machine. Regards Paul WB8TSL
On Thu, Nov 30, 2017 at 8:47 PM, paul swed <[email protected]> wrote: > Will forward tomorrow. Yes I recall my lamp voltage is also very good. > > On Thu, Nov 30, 2017 at 8:41 PM, Jerry Hancock <[email protected]> wrote: > >> Paul, send whatever you have to clist <mailto:[email protected]> at >> hanler (without the D) dot com >> >> Also, the caps we replaced were only 4 electrolytics. 3 x 470uf 25v and >> a 270uf at 16V. I used a 330uf 25v for the later. >> >> I’ve seen them for like $30 Canadian. I think they are inexpensive due >> to the failure of the caps, no rs232, no docs, etc. I get great lamp >> voltage on mine, all over 10V if that says anything. They seem stable but >> I don’t have the test setup needed or much to compare them to except my >> GPSDOs. I hope to have a Cesium standard by end of year and I am building >> the TPLL test set. But it seemed like there was some decent work done on >> the physics package. Looks like it was all assembled by hand, then >> taped-up, sealed twice and clamped. >> >> Thanks. >> >> Jerry >> >> > On Nov 30, 2017, at 5:24 PM, paul swed <[email protected]> wrote: >> > >> > Jerry >> > I have some dribs and drabs of details on the units I have. Happy to >> send >> > whatever I have to you directly. Suspect its to large for FEBO. What I >> can >> > tell is they must have been considered quite good and for military use. >> I >> > haven't run mine alot because I was concerned about the temp like you. >> Nor >> > have I really dug in. They just worked from day one. >> > Granted maybe better if I look at the caps. The good thing about the >> unit >> > is the connector is clearly labeled with the pin functions. So I was >> able >> > to operate them right out of the hamfest. As I recall these were very >> very >> > inexpensive. >> > Regards >> > Paul >> > WB8TSL >> > >> > On Thu, Nov 30, 2017 at 8:04 PM, Jerry Hancock <[email protected]> >> wrote: >> > >> >> Paul, The units Gilbert gave me were TS-RFS. They are fairly large. >> The >> >> physics end is about 5”x2”x2" and overall length about 9”. They lock >> >> pretty quickly now that I’ve replace the caps. They can drive 50ohms >> >> pretty hard, outputting a square wave. I’m thinking of bolting on some >> >> fins to the physics end. Just two points: 1) it would be nice to dial >> them >> >> in closer; and 2) I wish I had equipment to test them more >> accurately. I’m >> >> working on building one of the Tight PLL test sets to solve #2. >> Gilbert >> >> suggested we look to see if we could tap into the field current >> somehow to >> >> set the frequency more accurately. >> >> >> >> >> >>> On Nov 30, 2017, at 3:44 PM, paul swed <[email protected]> wrote: >> >>> >> >>> Jerry >> >>> You have some EG&G RBs. Thats great news. Now I am not alone. I have 2 >> >> also >> >>> that work. I have found little details on them. >> >>> That said I believe they are intended to be mounted on a heat sink. >> One >> >> end >> >>> surely looks like that whats would be done. >> >>> I believe mine are LCR-10-T. Might have to double check that. >> >>> Regards >> >>> Paul >> >>> WB8TSL >> >>> >> >>> On Thu, Nov 30, 2017 at 6:22 PM, Jerry Hancock <[email protected]> >> wrote: >> >>> >> >>>> I was able to get all 5 of these EG&G Rubidium Frequency Standards >> >> running >> >>>> by replacing the caps as another member found. They have a large >> >> heatsink >> >>>> on them, no fins, and are running at 43C. Is that too hot? Should I >> >> bolt >> >>>> them down to a larger heatsink? They consume a little over 9w after >> >> they >> >>>> lock, about double that while warming up. >> >>>> >> >>>> The only other issue I see is that the 8bit frequency setting doesn’t >> >>>> allow me to set the frequency closer than 5E-11. I don’t know if >> this >> >> is >> >>>> good for these units and RFS in general or not. >> >>>> >> >>>> Thanks. >> >>>> >> >>>> Jerry >> >>>> >> >>>> [/begin buttkissing] >> >>>> >> >>>> PS: I have learned quite a bit from this group in the past couple of >> >>>> months. John Miles, Gilbert, Mark Sims, Bob, etc, etc have been a >> lot >> >> of >> >>>> help and have added a lot of enjoyment to my hobby. >> >>>> >> >>>> [/end buttkissing] >> >>>> >> >>>> _______________________________________________ >> >>>> time-nuts mailing list -- [email protected] >> >>>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> >>>> mailman/listinfo/time-nuts >> >>>> and follow the instructions there. >> >>>> >> >>> _______________________________________________ >> >>> time-nuts mailing list -- [email protected] >> >>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> >> mailman/listinfo/time-nuts >> >>> and follow the instructions there. >> >> >> >> _______________________________________________ >> >> time-nuts mailing list -- [email protected] >> >> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> >> mailman/listinfo/time-nuts >> >> and follow the instructions there. >> >> >> > _______________________________________________ >> > time-nuts mailing list -- [email protected] >> > To unsubscribe, go to https://www.febo.com/cgi-bin/m >> ailman/listinfo/time-nuts >> > and follow the instructions there. >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/m >> ailman/listinfo/time-nuts >> and follow the instructions there. >> > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
