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

[k1jos at att.net]

I just repaired a few in my KWS-1.  If you can get an inexpensive ultrasound cleaner and some mild dishwater liquid detergent.  They do come apart after a few minutes and get really clean, even the silver plated contact surface

Jerry NY2KW

-----Original Message-----
From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On Behalf Of Barry
Sent: Friday, September 20, 2024 12:17 PM
To: Jacques Fortin <jacques.f at videotron.ca>
Cc: R-390 Mailing List <r-390 at mailman.qth.net>
Subject: Re: [R-390] Looking for a 5-25 pF Trimmer

Here's what mine look like.  I thought the rubber insulator should lift off the phenolic plate but it doesn't want to come all the way off.  Perhaps it's just stuck tighter than I've tried to pull it.

Now that I take a closer look, that is an Erie trademark.

When I adjusted the trimmers last night, some of them were a bit stuck but moved okay after a little "snap".  Apparently this one may have disintegrated when it snapped.  I suppose I could have taken them all apart and soaked them in IPA to avoid this but I just didn't think of it.

Thanks,
Barry - N4BUQ



> Hi Barry,
> 
> Well, your R-390/URR seems to be full of surprizes...
> So to speak...
> Yes the originals were made by ERIE, and I have a fair amount of those.
> See attached picture.
> However, I cannot tell right now how much it will cost to ship one or 
> many of those to you.
> BTW, I hesitate to dismantle my own Z203 to see how it is assembled 
> inside the can.
> Can you send me a picture, just to be sure ?
> 
> 73, Jacques, VE2JFE in Montreal
> 
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