Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Model 90 Tuning after cleaning tuning capacitor
#26

If the mica insulators for the trimmers are shot, they may be easily replaced.

Get any "blister pack" of stuff from just about any store - you know, the kind of package that is thin clear plastic.

Cut the plastic into rectangular pieces the same size as the mica insulators.

Use an awl with a piece of wood underneath, and carefully punch a hole in the center of each piece of plastic.

Disassemble each trimmer, making sure everything is dry after they are disassembled. (Do this one trimmer at a time, don't disassemble all four at once.) Don't lose any parts!

Install a piece of plastic in place of a mica sheet and reassemble the trimmer. Repeat this for every trimmer.

It will work fine. Icon_smile

I've done this many times on those older Philco 90, 70 and 20 trimmers.

--
Ron Ramirez
Ferdinand IN


Messages In This Thread
RE: Model 90 Tuning after cleaning tuning capacitor - by Ron Ramirez - 01-28-2016, 08:47 PM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM

[-]
Who's Online
There are currently no members online.

>