Magnus is right if there is any tube life at all and I do mean fumes. (odd spacing all of the sudden) In HP 5060/5061 Frankenstein (A combo of the two systems) I built a new heater controller to drive the few fumes off of the 5060 tube. Amazingly the darn thing works. The i meter barely barely moves. But yet it locks. Good luck. Paul WB8TSL
On Thu, Aug 28, 2014 at 12:47 PM, Magnus Danielson < [email protected]> wrote: > If you have tube-life and not other issues, it's about the same. > Also works for rubidiums, as the loop aspect here is essentially the same. > > There can be *other* issues. For the 5060A for instance, you might need to > also adjust the crystal filter of the OCXO, as that too drifts out of > range, so you get no signal out. > > What I write is not a fix-it-all but rather addresses that one issue. > > Cheers, > Magnus > > > On 08/28/2014 06:35 PM, Bob Bownes wrote: > >> Is there a similar 'bring it back to life' procedure for the 5061A? >> >> >> On Thu, Aug 28, 2014 at 12:32 PM, Magnus Danielson < >> [email protected]> wrote: >> >> Chris, >>> >>> Do you have a GPS clock? >>> >>> First turn the operational mode setting from off to second step (ocxo + >>> ion pump) and let it stay there for a day or so. >>> >>> Then, as the oven have stabilized, switch it over to third step, the open >>> loop mode, and tune the OCXO up against a GPS reference so that it is >>> very >>> near 5 MHz. You use the calibration whole on the front of the clock for >>> that. >>> >>> Then, you turn the operation mode switch to the fourth and last step, the >>> closed loop step, and see if it locks up. Let it just sit there and lock >>> up, as it takes some time. >>> >>> It's quite common that OCXOs have drifted outside the capture range of >>> the >>> analogue loop, so loosing lock and not being able to attain it again is a >>> typical response. >>> >>> Cheers, >>> Magnus >>> >>> >>> On 08/28/2014 04:33 PM, Chris wrote: >>> >>> On 08/28/14 05:03, Javier Herrero wrote: >>>> >>>> Hello, >>>>> >>>>> Here is the manual I've. I have also some other documentations, and >>>>> some >>>>> Oscilloquartz software for the OSA-5585, but I don't know if they are >>>>> very useful. >>>>> >>>>> Regards, >>>>> >>>>> Javier >>>>> >>>>> >>>>> Hi Javier, >>>> >>>> Thanks for that and for the other replies. The 3210 looks like quite an >>>> early design, with no sign of microprocessors at all. There's a 8 slot >>>> card cage with a load of discrete analog circuitry, 741 op amps etc and >>>> a couple of boards full of 14 / 16 pin ssi cmos / ttl devices, which I >>>> guess would be the synthesiser logic and perhaps a state machine style >>>> startup sequencer. Apart from that, the rest is power supply related and >>>> what looks like an alarm board with optoisolator discete outputs to a 25 >>>> way D connector. The step recovery diode (?) multiplier into the >>>> microwave cavity is a really neat gold plated assembly with what looks >>>> like a 50r termination (setup tap for spectrum analyser ?) and an >>>> adjustment trimmer, but am not touching that or the many trimpots on the >>>> boards or any adjustments until I have more info. The tube is from FTS, >>>> part number / model 7101. >>>> >>>> It seems strange that the 2nd harmonic, meter #9, is zero, since even >>>> with a tube approaching eol, one would expect at least some indication, >>>> which is why I think there may be an electronic fault. Perhaps the hv >>>> power supply module feeding the electron multiplier. Will try to measure >>>> that, but the area around the tube is really heavily rivetted and >>>> screwed down in all directions. Looks like a lot of the left hand side >>>> of the case will need to be disassembled just to get at the tube >>>> connections. It also had the battery backup option, with 4 sets of 3 x >>>> cyclon type cells, but with a date code of 1984, are seriously dead and >>>> have been removed. >>>> >>>> This time nuts things seems to be a growing interest and wonder if there >>>> is a cure ? :-). Recently bought a 1970's era Tracor 304D rubidium >>>> standard. Again, no lock, but a very well engineered and screwed >>>> together piece of kit and should be fixable. Collection now includes the >>>> Z3816, from Ebay US around 7 years ago, a Z3815 currently being >>>> repackaged, an HP103 with open circuit oven heater elements and the >>>> 3210... >>>> >>>> Regards, >>>> >>>> Chris >>>> >>>> >>>> >>>> _______________________________________________ >>>> >>>>> 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/ >> 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.
