[time-nuts] HP5065A Step Recovery Diode, what part#?

Mike Feher mfeher at eozinc.com
Tue Aug 28 16:00:13 EDT 2018


I believe that all of those microwave brick oscillators use SRDs, 73 - Mike

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115

-----Original Message-----
From: time-nuts <time-nuts-bounces at lists.febo.com> On Behalf Of
cdelect at juno.com
Sent: Tuesday, August 28, 2018 1:09 PM
To: time-nuts at lists.febo.com
Subject: [time-nuts] HP5065A Step Recovery Diode, what part#?

Hi,

I'll throw my two bits in!

Diodes from Efratom FRS, FRK, and M100 are made for 60Mhz drive and probably
would be a good fit.

I'll take a look and see if I have any junkers.

All diodes used in Rubidiums are inside the cell oven so operate at a high
temp anyway.

I agree with Ed, swapping A3 modules requires retuning. One tidbit, make
sure the two trim caps are actually rotating! The top rotor can get stuck
and if you force it the screw connection will break. Then you have a fixed
capacitor, not a variable anymore. If you check ahead of time you can break
the rotor free by levering a tool against it laterally.

Cheers,

Corby


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