Hi The device in the cavity that takes the 60 MHz up to 6.x GHz is a step recovery diode ( SRD ). The actual device used (apparently) was unique to the 5065.
One proposed “fix” is to eliminate the whole synth / multiply empire and replace it with a very high resolution DDS generating the 6.x GHz. My guess is that will turn out to be a lot of work …. Bob > On Oct 22, 2020, at 9:59 AM, Ulf Kylenfall via time-nuts > <time-nuts@lists.febo.com> wrote: > > > Strolled into my little lab only to find the 5065A's Red Integrator Limit > light on. Control negative fsd. PhotoCurrent OK. No 2nd harmonic. > > Was just about to power off and start to disassemble the unit. > All of a sudden, the Integrator light went out. Control went to zero > and by pressing Reset, the unit locked with previous 2nd harmonic > level indication. > > What ever the problem was, I do not know. I guess I can fix (redesign) > the synthesizer and replace some semiconductors that have failed > but if the problem is in the Rb Cavity RX unit - Varactor - there is a > problem. From a similar unit (but without the TED) I can see that > some part of the varactor assembly can be dismantled, but then > there are a few tiny screws that seems hard to reach. > > Has anybody repaired the Rx part with the varactor assembly? > > Regards > > Ulf Kylenfall > SM6GXV > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.