[TenTec] 540 Triton model 245 cw filter

[Curt]

I  bought a 544 without the filter, WTB postings yielded nothing, of course 
Ten-Tec no longer sells the filter. Fortunately, owned a 540 with a 245 
installed, so cloned the filter.  It isn't very complex, just a couple of 
dual op amps.  Parts cost a total of about $15, had a pcb made by tracing 
the lands from the 245 on-hand, unfortunately the holes for the pins used to 
plug the board ended up being a little off.  Still, I was able to make 
everything fit and now the 544 has a working filter too.  Vector board with 
point-to-point wiring would probably work as well.

I got a pdf from somewhere of the circuit but it is on my other computer 
about 60 miles from here.  Will send it to you after the holiday.

73 Curt, KB5JO


----- Original Message ----- 
From: "Marty Hartwell" <mhartwe at gmail.com>
To: "Ten Tec" <tentec at contesting.com>
Sent: Tuesday, June 29, 2010 3:03 PM
Subject: [TenTec] 540 Triton model 245 cw filter


> Hi
>         In a trade recently I acquired a TT540 with out the model 245 CW
> filter. I think
> those are maybe somewhat hard to find these days but thought I might ask
> here if
> anyone has one for sale.
>          Another thought crossed my mind also, I believe the Argonaut 509
> used the same
> filter in an external plug in accessory and was wondering if someone may
> have a circuit
> drawing for that available that I might have a copy of, any costs
> reimbursted. It would be
> real convenient if it could be sent via email too.
>         Along that same line anyone know if Ten Tec may have a copy of 
> that
> model 245
> CW filter I could down load. I looked last night for a little while and 
> had
> no luck I may
> try calling them yet today and ask.
>
> Marty kd8bj
>
>
> -- 
> Marty Hartwell
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