[R-390] 390 RF Deck Replacing After Removal

[Glenn Little WB4UIV]

If the switch is brown, you may create more problems by squirting 
contact cleaner on the switch.
The phenolic in the switch will absorb the contact cleaner and swell.
The swelling will jam the switch.
If the swelling occurs, you will have two choices, flush the switch with 
alcohol to remove the cleaner, or replace the switch.

To properly clean a phenolic switch you place a minute amount of cleaner 
on the contacts and rotate the switch to clean the contacts.
Avoid getting the cleaner on the phenolic.


Glenn

On 1/27/2022 2:26 PM, surfweber at netzero.net wrote:
> Hello to the Group,
> I’m new here and am searching for an R390 expert in removing and replacing the rf deck.
> I need to squirt detox-it onto the rf switch on the bottom of the deck to clean up bad noise when I switch bands.  I have the TM 11-5820-357-35 and some notes I gleaned off your archives, but it still doesn’t give me the confidence that I’d be able to re-align the slip gears and crystal switch and my fear is I’d end up with a literal boat anchor.  Unless this is easier than I’m envisioning.
> But if not, is there anyone in the New Jersey/New York/Pennsylvania metro area that has the skills to help me or possibly can do the delicate work with me bringing it over.
> I am located in northern New Jersey and would be willing to travel if someone  can help.
> Thanks for reading..
> Bill Becker
> Collins R390 all original
>
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-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"