[R-390] Looking for a 5-25 pF Trimmer

[Barry]

Hi Jacques,

Thanks so much for the repair document.  I didn't realize an ultrasonic cleaner could be bought from Harbor Freight.  They're a bit more expensive than described in that document but that document is over ten years old now so not surprising.

Another list member is sending a complete trimmer so I think I'm good to go now.  The repair shouldn't be difficult.

Thanks!
Barry - N4BUQ

> Hi Barry,
> 
> "Frozen" Erie trimmers are a common problem in Collins radios (S-line and
> etc.).
> Glen Zook wrote a procedure to "repair" those.
> But it does not always work.
> When you got a frozen trimmer into the R-390A crystal deck, you have to
> rebuilt the unit entirely (guess how I know).
> 
> About yours now: how much do you need ?
> BTW, remove the rubber insulator: it is only there to prevent the rotation
> of the thin ceramic disk, but what happen most of the time is that the small
> disk "adheres" to the top portion and rotate with...
> I will send you all the replacement parts if you still need those.
> 
> 73, Jacques, VE2JFE in Montreal