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Re: [TenTec] Argonaut II/Delta II crystal filters

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Argonaut II/Delta II crystal filters
From: Kevin Purcell <kevinpurcell@pobox.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 1 Aug 2007 09:31:13 -0700
List-post: <mailto:tentec@contesting.com>
Especially as Ten Tec holds a patent on the Jones Filter (until  
2009). Interesting read.


I suspect Elecraft aren't using it (though I'd love to hear that they  
licensed it). Previously mentioned on the Ten-Tec list


It's a compromise design. It's 8 crystals (and some varactors) doing  
the work of quite a few more crystals in a small space.

I think it's a win for compact equipment (like the small Scout/Argo)  
but I didn't think it was a good match to the "bigger" gear like the  
Argo/Delta II.

On Aug 1, 2007, at 5:37 AM, Bob Towers wrote:

>> Bottom line, TenTec dropped the Jones filter as it was a failure.  
>> Elecraft
>> uses it and has had success with it, to say the least!
> Ah, see my second comment! It's certainly a much better filter in the
> K2, though I would like that PBT and fully variable bandwidth on my  
> K2.
> Can't have everything, I suppose.

Kevin Purcell

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