Hi Ok, since it's moved *down* and it's about on temperature there are a couple of likely possibilities:
1) The crystal leaks and there's air in it 2) The trap coil(s) / capacitor(s) have changed value 3) The varicap is shorted / forward biased Normal factory troubleshoot (after checking the varicap) would be to swap the crystal and see if the problem follows the crystal or the oscillator. Yes, I know, that's not very helpful in this case - sorry about that. Bob On Jul 25, 2013, at 9:32 PM, paul swed <paulsw...@gmail.com> wrote: > Well lucks not so good do have the voltage closer but as Bob C said. That > ain't the issue. > Darn I hate when he is right. By the way the oscillator draws 26 ma approx > as a reference. Reassembled everything and let the oven heat up it settles > at 81C 15 min after start and within a respectable range of the temps > listed in the service manual. Measured with a K thermocouple. Freq is at > 9.999955. or 45 Hz low > Tuning the variable cap has 20 Hz range and the cap was pretty much center > range. Have not played with the varicap but that should have a very small > effect. > I can easily adjust the temp setting R to raise the xtal temp. But that > seems like a jerry rig. > Could a xtal of this quality simply go bad over time? > Somewhat at a loss here. > I have a spare 10544 (Would not use the z3801 outer oven)and wonder if at > least I could use that with the Z3801. Anyone know if the efc would work? > Regards > Paul > WB8TSL > > > > > > > > > > > On Thu, Jul 25, 2013 at 10:28 AM, Stefan Heinzmann > <stefan_heinzm...@gmx.de>wrote: > >> paul swed wrote: >> >>> I can't believe you found the transistor. When I pulled it out last night, >>> its actually a MPSA18!!! I had not had time to look it up but figured it >>> was a ebay leftover hunt. :-) >>> At that price I may order 20 of them. Like the gain. >>> >>> Toshiba used to make a transistor with even higher gain, the >> 2SC3112/2SC3113/2SC3295/**2SC4666 (same chip, different package). They >> discontinued it recently, however. >> >> Cheers >> Stefan >> >> >> ______________________________**_________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/** >> mailman/listinfo/time-nuts<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.
