[Lowfer] Multiple Soundcards

Sat, 9 Feb 2002 15:43:39 -0600

On a similar note, you could build an audio duplexer.
Receiver A has a pass filter tuned to the desired frequency.
Receiver B has a pass filter tuned to its desired frequency.
The two outputs are summed together to drive one sound card.
The audio duplexer is needed to prevent noise from the opposite
receiver from masking the desired signal. Notch filters may be just
as effective and easier to implement.

But, really, given the low cost of second hand computers, why not
get a really cheap pentium or even a 486 as a second computer to
run with the second receiver?

Another option would be to record the audio from the second receiver
during the night and runs captures on the playback by day.
Perhaps a VCR could record the whole lf band (probably a good part
of HF too). You could process these tapes on days that are too noisey
for LF reception.

73, Jim Shaffer, WB9UWA.

----- Original Message -----
From: Mr. K. Rudolph, KD7JYK <[email protected]>
To: <[email protected]>
Sent: Friday, February 08, 2002 11:44 PM
Subject: Re: [Lowfer] Multiple Soundcards

> An idea, tune one receiver slightly higher than the other, say 500Hz or
> 1,000 Hz, seperate receiver per side, one left, one right, maybe you'll
see
> two traces on one screen a few hundred Hz apart visually.  One above the
> other...
>
> Kurt
>
> ---
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