Dick,
I am also interested if you are able to find any information on the
FR-4. The only information I have seen is mention in a description of
the S30 Signalizer, which contains an FR-4. It simply states "...a 400
Hz passband CW filter with adjustable attenuation."
73,
Alan N5NA
http://www.tentecwiki.org
KnoxCol@aol.com wrote:
> Happy St. Patrick's Day Ten Tec Fans!
>
> I was at the Marshall, Michigan, Amateur Radio Swap this morning and
> found a pristine piece of TenTec gear that I had not seen before. It is an
> FR-4
> Audio Filter. I believe this goes with the PM series of radios. Can
> anyone
> in the group provide information on it and what it's worth might be?
> Thanks and 73! de KD4BRL Dick O'Knox
>
>
>
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