Its been over 40 years since I played with one but I don't recall the
pistons being a problem back then but 40 years can do a lot, self evident.
Have you made sure it's not something else. Try freeze spray and putting a
hot soldering iron tip near the piston caps to confirm that they're the
problem.
73
Hank WD5JFR
"Tony Angerame" wrote in message
...
In a recent restoration project I noted that some of these in the RF
section, mainly on the three highest bands are intermittent. i.e. I tap on
one a few times and a previously dead band comes alive. It seems to last
but
I'd sure like to clean these up. Can someone describe the construction?
They
appear to be a slug (Made of a dielectric?) inside a ceramic tube with
metal
end caps. Should I use deoxit around the screw and twist a bit? I'll
probably clean these in conjunction with an rf alignment.

Nice receiver BTW stable with great audio.


TIA Tony WA6LZH