I was wondering about a 5061b that I got from a government liquidation auction..I have had it locked for months now I just checked the mult meter, reads 41 is this tube end of life as you were saying or are these diff scale..I dont have any manuals for any ofthe 5061 a or b ----- Original Message ----- From: "corby d dawson" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, December 22, 2007 9:09 AM Subject: [time-nuts] 5071A tube evaluation
> David, > > If the unit has been stored for years then the first time it is plugged > in the ion pump current displayed will be high and the Cs oven will be > disabled. > > When the ion pump current drops the oven will turn on momentarily and > outgas. This will cause the ion pump current to rise and cut off the oven > again. > > This cycle will continue (sometimes for many hours) until finally the > oven will stay on. > > The after 15 minutes or so the unit should lock. > > Now monitor the electron multiplier voltage for a week or so. It > hopefully will start out well below 2500 Volts and remain stable. > > If should remain stable and not exibit a constant rise (over a week or > so, it can show slow variations over months). > > The amplifer gains should also be low. (for the default starting values > look at the gains before the unit warms up.) > > A depleted tube will show a rapid rise up to the maximum voltage and > after the amplfier gains also rise to the top to compensate the unit will > fault out. > > If the mainframe has a problem or you have a tube not in an instrument I > have a stand alone Cesium tube tester that I charge a small fee to test > tubes in. > > Hope this helps, > > Merry Christmas! > > Corby Dawson > > _______________________________________________ > 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.
