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[linrad] Linrad HW
- Subject: [linrad] Linrad HW
- From: Josh Logan <josh-linrad@xxxxxxxxxxxxxxxx
- Date: Wed, 14 Apr 2004 15:27:40 -0700 (PDT)
Hardware for linrad. That has defintally been a discussion point on this
list but there still is not any good designs that I have seen.
I do not have the knowledge to lead this, but would be a very willing
partisipant in building some simple hardware for linrad.
Initally is someone will to lead a project that will be usable to receive
CW, SSB, and AM signals, using a SB Live or similar card. Possibly even
only 1 channel and therefor only 1/2 the available BW of the sound card.
The idea behind this is simple, and possibly as building blocks for
something more complex.
As an example. I have a PTS 160 (signal generator) that is split to two
TUF-1 mixers by a coax T. I then have a G5RV jr antenna (with antenna
tunner) that I use a second coax T to feed the RF side of the mixers. I
then take the IF output and feed that to a sound card. I have a unknown
length of coax between the to LO ports, ideally this would be 1/4
wavelength, but I can't terminate coax to get this on the different bands.
I can decode STRONG CW, but that is about it. I have two signals on the
screen for every real signal (one on each side of center line). SO it is
not working well.
I would like to build something that would better feed the soundcard. I
would like it to work up to 2M, but am willing to start with something
that is just HF for the first rev, if the larger frequency range would
make the hardware too complex.
Anyone willing to shard thair hardware desigs and help lead some hardware