[TenTec] FR-4 Audio Filter

[Clark Savage Turner]

Wow, the old FR-4.  Bought one new from Ten Tec way back in '72 I 
think.  Put it next to my PM-3A and got a little selectivity with it.  
It was a passive audio filter that worked tolerably well with the low 
audio output of the PM series.  Helped in a pinch.  If in pristine 
condition, heck, just get it to stare at!  I would.

Clark
WA3JPG

On Mar 17, 2007, at 1:36 PM, Alan Sewell wrote:

> 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 at 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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>
Clark Savage Turner, J.D., Ph.D.
Professor of Computer Science
Cal Poly State University
San Luis Obispo, CA. 93407