I'll send you a known working 10368A. /tvb (iPhone4)
On Oct 28, 2012, at 1:36 PM, John Ackermann N8UR <j...@febo.com> wrote: > Thanks to all for the helpful replies. > > At this point, I believe what happened is that the degausser isn't working > properly and that may have resulted in the tube being more magnetized rather > than less; no matter what I do, I am now getting lock at about -5e11 -- which > is not what it used to be. > > I've started troubleshooting the 10368A degausser, and it appears that the > exponential current decay, doesn't. I fear that op-amp U1 (a pre-IC block > labeled Intech A-233) is bad as the voltage driving the darlington pair is > stuck at 14.5 and doesn't decay with time. I hope that the A-233 is just a > potted, discrete transistor, generic opamp, so I suspect that I can dead-bug > something like an LM358 in its place. > > If anyone else has encountered this situation, I'm all ears... > > John > ---- > > cdel...@juno.com said the following on 10/28/2012 11:50 AM: >> After the degauss you should recheck the Zeeman setting, which you did. >> >> You also verified the synthesizer frequency is set to the frequency that >> requires a C-field current high enough to reach 53.53. >> >> Since it is running at 48.21 you should increase the C-field setting >> until the central peak moves to 53.53. >> >> This is assuming that your unit has the resistor installed for 53.53. >> >> If not you will reach the end of the C-field pot before getting to 53.53! >> >> In that case you need to put a decade box (set to max resistance) across >> the C-field resistor and with the C-field set to 500 reduce the >> resistance until the central peak gets to 53.53. >> >> Then solder in a 1% fixed resistor (closest value to the decade box >> reading) across the C-field resistor. >> >> Now recheck and you will be able to use the C-field pot to reach exactly >> 53.53. >> >> Cheers! >> >> Corby Dawson >> ____________________________________________________________ >> Woman is 53 But Looks 25 >> Mom reveals 1 simple wrinkle trick that has angered doctors... >> http://thirdpartyoffers.juno.com/TGL3141/508d54a2aac4554a26ff4st02duc >> >> _______________________________________________ >> 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.