[Boatanchors] Contact cleaner and tube sockets?

[Philip Atchley]

Hi, me again,
Two different people suggested that "maybe" the oscillator tube socket in
that NC-300 was bad, keeping the unit from oscillating.  I have heard of
contact cleaner's damaging and/or swelling the phenolic wafers of band
switches causing them to bind etc.

Here is an excerpt from one that I received from Garey, K4OAH that raises a
question.

"I guess I'd be suspicious of the tube socket.  I've been finding
more and more tube sockets that have been ruined by spray
"contact cleaners".  They become "leaky" between pins and screw
up all sorts of Hi-Z circuits."

QUESTION:   Can these cleaners also damage or "soak into" ceramic or
steatite band switches and tube sockets, causing leakage?  The reason I ask
is because both the bandswitch and tube socket in the NC-300 is
ceramic/steatite and look like they may be a little porous.   If that is
indeed the case, it would go a long way towards explaining why the set
refused to work even though all parts/wiring check good.

73 from the "Beaconeers Lair".
Phil, KO6BB

DX begins at the noise floor!
Merced, Central California
37.18N  120.29W  CM97sh