You can sometimes find a Ten-Tec Model 208 audio filter on sale. It was an
outboard filter made for the Argonaut series QRP rigs. It is the same filter
board used in the Triton IV.
73, Winston K4CWQ
----- Original Message -----
From: <agtaylor@llnl.gov>
To: <tentec@contesting.com>
Cc: <jessysystems@waypt.com>
Sent: Wednesday, January 17, 2001 19:04 PM
Subject: Re: [TenTec] Model 544 CW Filter & NB
>
> On 17 Jan, Peter G. Juliano wrote:
> >
> > Hi Ten Tec Users,
> >
> > Well I will make another appeal--I am looking for the optional CW Filter
and
> > Noise Blanker that goes with the Model 544 (Digital Version), Triton IV.
I
> > really would like to have the CW filter as a first priority. Another
option
> > is to build the CW filter and stuff it inside the radio. I have not
checked
> > with TT yet; but does anyone have schematic of the TT CW filter. I
believe
> > it is an audio type filter and is designated as model 245.
> >
> There may be a source of those filters... Embedded Research makes
> a clone of the audio filter for the Argosy and I suspect it is
> equivalent to that in the Triton IV. BTW: I have a Triton IV with
> audio filter and could check the schematic, etc. if someone has
> the comparable info for the Argosy 224 filter. The Triton IV
> filter uses four cascaded op amp filter stages to do the deed.
> I checked it out a bit ago when I was seeing if I could access
> the intermediate selectivity options in that filter.
>
> Check out Embedded Research at
>
> http://www.frontiernet.net/~embres/af224.htm
>
> Good luck! K7GT
>
>
>
> Allan G Taylor
>
> agtaylor@llnl.gov
>
>
>
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