Re: "Sampler??"

On a sunny day (Thu, 1 Aug 2024 08:27:16 -0000 (UTC)) it happened Cursitor
Doom <cd999666@notformail.com> wrote in <v8fgt4$231a4$1@dont-email.me>:

...
I moved overseas and couldn't hold on to everything, sadly. Didn't have
time to find a museum either.

As to repair / fault finding of that thing we were talking about,
I dunno what the symptoms are?
But after letting the 100 pages or so sink in in my brain:
Like somebody mentioned, check power supply (caps) for ripple with a scope,
supply voltages.

Likely source of damage is the input stage (may have been overloaded, manual shows strict limits)

So, put some 100 MHz or so signal on the input, check with a scope if it reaches the first mixer stage
check if something comes out of that mixer stage.
If not check if the local oscillator signal is present at the mixer stage
if all OK go for the next mixer,
If all OK check if the sweep generator works so the local oscillator is actually sweeped,
check if any signal in the (20 MHz or so?) first IF stages,
basically follow the signal path.
With all the boat anchors you have 'floating??' about those measurements should be easy.
All OK so far and display scope working at least you should see a trace with something on it

Need more info on what the problem is, should not take more than a hour that way.
If something with the other electronics.. have not looked at it much.