In casual operation, I doubt you'll see much difference. However, if you
are planning on operating during a contest, or otherwise want to use a
wide audio path (SSB bandwidth) with AGC OFF (so strong stations don't
smother weak ones via AGC action) and with lots of signals
simultaneously present, then you'll want a system with very low IMD.
The least expensive soundcard that I own that does a reasonable job with
SDR (and by extension should do a reasonable job under the conditions I
described) is the Creative Soundblaster MP3+. This is a USB-based
widget, and you can buy these from Creative's online shop, refurbished,
for $14.99.
73,
Lyle KK7P
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