[HomeBrew] Simple Receivers

[Steven Weber]

Before we can point you to a simple receiver, we need to know what the
application is. If you just want to just hear stations, that's one thing,
if you want to talk to stations, that's another. 

A simple Direct Coversion receiver which is built with pretty common parts
(couple of jfets and some generic transistors) is the "Tin Ear". Info on
this can be found at <http://www.amqrp.org> The Tin Ear tunes the 40M band
and is broad as a double wide barn door. But the VFO is simple and
suprisingly stable. One could tack in one or two stages of audio band pass
filtering to narrow the response for more effective CW reception. 

OTOH, a superhet receiver can be made pretty simply with a couple of
SA612s, a dual op amp and a hand full of discretes. Not all that more
complex than a DC receiver, it has sigificant advantages. 
72,
Steve, KD1JV
"Melt Solder"
White Mountains of New Hampshire
http://www.qsl.net/kd1jv/