[time-nuts] HP 10811 Tuning Diode

David McGaw n1hac at Alum.Dartmouth.ORG
Thu Oct 18 16:46:33 EDT 2012

That would be a Motorola MV1650 or equivalent.  You may have to select 
for 100pf +/- 5% @ 4V as the standard spec is 10% but it probably does 
not matter as the tuning ratio will be greater than the >2 spec.


On 10/18/12 3:18 PM, Adrian wrote:
> Hello,
> I found the 10811 in my 8662A to be quite noisy and was able to trace 
> the problem down to the tuning diode.
> Actually, the phase noise started to jump when the oven heated up. As 
> a quick solution, I replaced it with a SMD type that I had at hands.
> I would appreciate any hint where to find an original diode (even 
> though I could leave it as is).
> As by the manual, the original is a '0122-0244 DIODE-VVC 100PF 5% 
> C4/C25-MIN=2 BVR-30V Mfr. 28480'
> Mfr. 28480 is listed as HP, but the diode is marked 'M' for Motorola 
> and '0244' and '312'.
> Adrian
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