Thanks Bob,
I got some offline help from someone and I redid my setup and I am now
getting decent data. It looks like it was finger problems.
It has only been warming up for a day but it is now looking decent. Once I
get a longer plot I will post all the things I did wrong in my setup.
It was the
Hi
The “better” 10811’s were sorted out from the “general population”. There is a
lot of anecdotal evidence that (at least for phase noise) far more hit the
better
categories than got labeled as such.
If indeed your device seems to have trouble, the OCXO is a likely candidate.
The power
If you're thinking it's the 10811, here's something to try:
Arrange to measure output frequency, and tune voltage, and put the curves up
on a dual-trace o'scope. If the output frequency fluctuations correlate in
the
correct direction of the tune voltage fluctuations, then the problem is
probably
Thanks Bob,
No rust just a couple of electrolytics leaked taking out a couple of nearby
parts.
Everything else looks very nice.
I might be able to find another 10811 to try. I thought there were
different versions
The specified one was supposed to be special low phase noise.
But I know nothing
Hi
If the inside of the 105 went under water long enough to rust out a lot
of parts on the boards, it’s a good bet that the 10811 in the unit got
hit pretty hard as well.
Simple answer: Spend $40 on an eBay replacement for the 10811.
It should just plug in ….
Bob
> On Dec 13, 2020, at 5:15
I am in the middle of resurrecting a HP105B, It is one of the later models
with an 10811 in.
I have fixed the obvious issues like the electrolytics that were missing
and other parts that had leads evaporated due to corrosion.
The basics seem to work, A not bad looking sine wave etc.
But the ADEV
