OK here is my humble version of cheap $125 at a hamfest. Thats what I picked up my dead 5061 0 tube life for. (Though the dead tube was a guess at the time.) OK you get what you pay for. Fact is the xtal oscillator was worth it kind of. The hours I spent experiment and learning truly were priceless. At least now I have a real hands on clue about Cs references. I seem to recall 5071s in the $10K range. Regards Paul.
On Fri, Sep 27, 2013 at 2:32 PM, mc235960 <[email protected]> wrote: > > Le 27 sept. 2013 à 20:21, Tom Knox a écrit : > > > With a cesium standards cheap is truly relative since the remaining of > tube life will make of break just about any deal regardless of price. > > Which is why I am asking these Qs. Cheap is indeed relative, as is time > itself. > > > Where it is hard to pay to much for a 5071A with a fresh tube. But I am > curious also what others would consider cheap. > > > > Thomas Knox > > > > > > > >> Date: Fri, 27 Sep 2013 12:52:25 -0400 > >> From: [email protected] > >> To: [email protected] > >> Subject: Re: [time-nuts] CBT designation and usage? > >> > >> Cheap is relative. Curious what it means? > >> Paul > >> WB8TSL > >> > >> > >> On Fri, Sep 27, 2013 at 12:20 PM, mc235960 <[email protected]> wrote: > >> > >>> Hi, > >>> Some Qs for someone with 5071A experience. > >>> > >>> I have picked up a cheapo second hand 5071A and would like to know what > >>> tube I have and what remaining life I might expect. > >>> It locked in about 10-15 mins after I applied power for the first time > >>> this morning. > >>> > >>> the box s/n is 3249A00498 and the tube s/n 3124A00248 has an (S) > suffix . > >>> There is an opt 001 (high performance CBT) label on the box. > >>> > >>> *idn? returns HEWLETT-PACKARD,5071A,0,X.3249 The Symmetricom manual > of > >>> 2006 give a "SYMMETRICOM" string returned. So it must be quite old I > >>> guess. > >>> > >>> X.3429 appears to correspond to the firmware version as seen on the > LCD . > >>> > >>> Given that, does anyone know how to find out > >>> > >>> a) date of manufacture > >>> b) type of CBT > >>> > >>> I could not find any command sequence to indicate usage, so is there a > >>> way to find out > >>> > >>> c) The cumulated CBT power on time? > >>> > >>> d) If that is not available, is there anything in Status summary that > >>> could give a clue to aging? > >>> > >>> scpi> syst:print? > >>> > >>> MJD 56562 15:20:21 > >>> CBT ID: 3124A00248(S) > >>> Status summary: Operating normally > >>> Power source: AC > >>> Log status: 15 entries > >>> > >>> Freq Offset: 0e-15 Osc. control: -5.57 % > >>> RF amplitude 1: 35.5 % RF amplitude 2: 33.4 % > >>> Zeeman Freq: 39949 Hz C-field curr: 12.157 mA > >>> E-multiplier: 1357 V Signal Gain: 14.4 % > >>> > >>> CBT Oven: 6.1 V CBT Oven Err: 0.02 C > >>> Osc. Oven: -9.0 V Ion Pump: 0.2 uA > >>> HW Ionizer: 1.1 V Mass spec: 11.0 V > >>> SAW Tuning: 1.9 V DRO Tuning: 5.7 V > >>> 87MHz PLL: 1.1 V uP Clock PLL: 2.7 V > >>> +12V supply: 12.4 V -12V supply: -12.3 V > >>> +5V supply: 5.5 V Thermometer: 42.3 C > >>> > >>> Regards, > >>> Mike > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> _______________________________________________ > >>> 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.
