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Re: [TenTec] 3.1 KHz IF Filter for 2nd IF in Omni 6

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] 3.1 KHz IF Filter for 2nd IF in Omni 6
From: "Mark S. Holden" <mark@holden-insurance.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sat, 9 Jan 2016 21:17:03 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
On 1/9/2016 8:32 PM, Gary J FollettDukes HiFi wrote:
I have a 3.1 KHz bandwidth filter in one of my Omni 6+ radios. It fits 
perfectly into the TenTec socket and was obviously made for the en Tec. 
However, it looks unlike any filter I havee ever seen in ANY Ten Tec product.

It is an 8 pole filter but it also had four small IF transformers on it, 
presumably to tailor the passband shape.

Has anyone heard of this filter? Does any know who made it? It is too perfect 
to have been a home brew job. It is built on thicker board stock than that used 
for most Ten Tec filters.

I would assume that its intent is to improve received audio in SSB. I am going 
to try it in a few minutes to see what the radio sounds like compared with the 
others.

Gary
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I'd expect that to be a fun filter for rag chewing.

My Harris RF-550 rx has a 3.24khz crystal filter that's incredible for SWL. I also installed some crystal filters intended for the Racal 6790gm in my AOR 7030+
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