John,
a simple "Softrock style" front end adapted for 136 or 500kHz should
work very well if you have a decent soundcard. There are a few SDR
programs that works with such a front end, for example I2PHD's Winrad.
Considering how narrow these bands are, there is no need for a VFO. Just
use a crystal oscillator for LO and do the tuning in the software.
Perseus is indeed a very good receiver, and it is a lab' instrument as
well. I will *never* regret buying that "appliance"! ;-)
The Perseus itself is very quiet but whenever a computer is involved in
the receiving process, beware of the potential noise sources... Here is
a horror story about my Dell laptop:
http://web.telia.com/~u33233109/dellpsu/dellnoise.html
73 de Johan SM6LKM
John RABSON wrote:
My receiver for this band is a Lowe HF250 with a 2m x 2m loop (estimated
effective height 8 m). It received G3XIZ surprisingly well on Sunday even
though the selectivity of the receiver leaves something to be desired and there
is a crossmodulation problem with longwave broadcast.
I'm thinking of getting something better, such as an SDR (Perseus?). What do people think?
73
John F5VLF
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