Pete,
There's a commercial version of what you are describing built and sold by
W2IHY (Julius, who also works on audio gadgets for hams). I bought one
recently and it seems to work quite well. He's very easy to deal with (see
his stellar reviews on eHam).
73, andy, ae6y
----- Original Message -----
From: "Pete Smith" <n4zr@contesting.com>
To: <cq-contest@contesting.com>
Sent: Monday, June 16, 2003 5:08 AM
Subject: Re: [CQ-Contest] Sound Card DVP - DX Doubler
> At 09:41 PM 6/15/03 -0400, Blake Meinecke wrote:
> >Say, how is everyone getting sound card voice keyer audio to a DXDoubler
> >box? Of course a straight-through "Y" connector doesn't work here.
> >Opto-isolater, x-former, or something?? A simple circuit described to me
> >direct would be wonderful. Google and list-searches have not yielded
> >anything.
>
> I use a simple interface with Radio Shack isolation transformers, together
> with a voltage divider in the "line out" line to reduce the voltage so
that
> it doesn't overdrive the mike input. The trick is that I feed the mike
> audio THROUGH the soundcard -- requires a soundcard that will work full
> duplex, but most, including ancient ISA Sound Blaster 16s, meet that spec.
>
> If anyone needs a schematic, I'll be glad to send one -- I've submitted a
> brief article to NCJ too.
>
> 73, Pete N4ZR
> The World HF Contest Station Database was updated 9 May 03.
> Are you current? www.pvrc.org/wcsd/wcsdsearch.htm
>
>
>
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