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Re: [TenTec] Replacment cw filter

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] Replacment cw filter
From: "Curt" <rhulett1@consolidated.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 14 Dec 2010 09:37:49 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Hello Marty,

Having the same problem you did trying to find a 245 for a 544 I bought, 
used the 245 from my 540 as a pattern.  All the components are still 
available, so had a PCB fabricated using my 245 as a pattern.  Did a less 
than perfect job of duplication, had to redrill holes for the 7 vector pins 
used to connect the board to the rig.
A lot of time and trouble for what might just as easily be accomplished 
using an outboard audio filter, just to prove to myself that could do it.

Anyway, it works perfectly, just same as the 245 in my 540.  It isn't very 
complex, just two dual op-amps and some resistors and caps.  Somewhere I 
have the TT documentation, pictures, parts list, schematic, pattern of the 

Building one on vector board is certainly feasible, and maybe easier than 
dealing with a PCB.

GL & 73, Curt

----- Original Message ----- 
From: "Marty Hartwell" <mhartwe@gmail.com>
To: "Ten Tec" <tentec@contesting.com>
Sent: Tuesday, December 14, 2010 8:53 AM
Subject: [TenTec] Replacment cw filter

> Hi
> I have asked in the past if anyone has a 245 filter for the 540 Triton IV
> and received no
> answers. So I am wondering if anyone in the past has built one on Vector
> board or
> ugly construction and gotten it to work? I am going to RS and see what 
> might
> be available
> to try this, it doesn't look to complicated to me.
> -- 
> --
> Marty Hartwell
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