[R-390] Mechanical Filters

[Buzz]

Here's the url of my web page on Collins filters
r-390-bounces at mailman.qth.net
I posted it here on the list a few times because I figured anyone with a R-390
would be here.

Buzz



On Thu, 31 May 2007 08:27:54 -0700, you wrote:
>
>
>-----Original Message-----
>From: r-390-bounces at mailman.qth.net
>[mailto:r-390-bounces at mailman.qth.net]On Behalf Of
>Flowertime01 at wmconnect.com
>Sent: Thursday, May 31, 2007 8:00 AM
>To: r-390 at mailman.qth.net; densmore at idirect.com
>Subject: Re: [R-390] Mechanical Filters
>
>
>Keith,
>
>The Fellows here on the R390 reflector did a whole series on rebuilding the
>filters
>here last year. You will need to look through the archives.
>
>There were even web pictures and everything when we got done.
>
>You can fix the filters if you can solder, We can help.
>
><snip>
>
>Here is an URL to a website that will at least help disassemble the filter.
>So far, I've had zero luck getting the coil winding apart. Can't dissolve
>the stuff used as a potting material. The last thing I tried was MEK. Soaked
>the coil for several hours; nada, zip, didn't faze it one bit.
>
>http://collinsfilter.tripod.com/
>
>
>But I did find the time to restore another R-390/A, an Amelco. Now
>repainting the trim on my house. If someone really knows what dissolves the
>potting material, I'd like to have the secret.
>
>Thanks,
>wd8kdg
>Craig
>
>
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