Re: [time-nuts] 5065A Rb Cavity Rx - SRD repair

2020-10-25 Thread Bob kb8tq
Hi As part of your “simple replacement” … keep in mind that it needs to act both as a multiplier *and* as a mixer. The two modes need to be reasonably separate from each other or you (likely) get a real mess. Bob > On Oct 25, 2020, at 4:26 PM, Ulf Kylenfall via time-nuts > wrote: > > > Disa

[time-nuts] 5065A Rb Cavity Rx - SRD repair

2020-10-25 Thread Ulf Kylenfall via time-nuts
Disassembled the surplus Rx cell by first disconnecting the short jumper cable and then unscrewed the brass part. Inside was a tiny diode, color coded "391" as have been previously discussed in a thread some years ago. I recon that if a diode would some time in the future breakan external mu

[time-nuts] 5065A Rb Cavity RX - SRD Repair

2020-10-24 Thread Ulf Kylenfall via time-nuts
Thanks for the picture. The small coax link cable is even more brown  than the one i my cavity  I did realize that it should be possible to test the diode  using a 20k/V resistance meter. There has been no more "hick-ups"  and what the cause was is unknown, but many repair sessionscan of

Re: [time-nuts] 5065A Rb Cavity Rx - SRD repair

2020-10-22 Thread Bob kb8tq
Hi The SRD is not easily accessible. Digging in to get it is going to involve a bit of work. The power level is going going to be a function of the cavity design. Apparently that design is “non-standard” so any number will be a guess. The 5065 manual shows typical RF voltage levels into the cav

[time-nuts] 5065A Rb Cavity Rx - SRD repair

2020-10-22 Thread Ulf Kylenfall via time-nuts
I see. Is the SRD in the Rx module accessible at all? What type of package is it? Is it possible to dismantle the Rx unit without risk of cracking the glass enevlope? Does anybody know the power level at 6 GHz? BR  Ulf Kylenfall  SM6GXV  __