[time-nuts] Noisy varactor diodes

paul swed paulswedb at gmail.com
Tue Dec 18 18:46:04 UTC 2012


Try these guys aiHave had luck on other parts. Aint cheap
http://www.americanmicrosemi.com/information/spec/?ss_pn=MV840

Regards
Paul
WB8TSL

On Tue, Dec 18, 2012 at 1:29 PM, <cdelect at juno.com> wrote:

> I was recently repairing a noisy A3 module for an HP 5065A.
>
> The phase modulator has 4 varactor diodes in parallel.
>
> Since I suspected a diode, I removed them one at a time.
>
> Of course it was the last one! Must be a universal rule there!
>
> Anyway here is a PIX of the noise with the diode reverse biased at 20
> volts.
>
> Anybody know where to get an MV840 ???
>
> Thanks,
>
> Corby
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