[Test-Equipment] Sencore FC-71 Counter

[Ron Youvan]

Richard Knoppow wrote:

>       I just bought one of these. It works fine but the
> crystal test is flaky, sometimes it works and sometimes not
> on the same crystals. Does anyone know what causes this? I
> did find a handbook on line but doesn't address this and has
> no schematic.
>       FWIW, I did try cleaning the crystal contacts by
> putting some DeOxit on a crystal and rubbing it around in
> the spring contacts, made no difference.

   Without a book, open it up and look carefully for bad connections and spray all switches with 
"contact cleaner" then exercise the switches.  Make sure the crystal socket/s don't have a broken 
connection in the phenolic part.  (seen it)
-- 
    Ron  KA4INM - The next election, I know what is going to happen, I'm going to help.