(Julian Vereker) wrote in message . com...

I'd like to build a simple receiver for 20m band. Saying "simple" I
don't mean a "starter project" - I've built my first direct conversion
receiver for 3.5 MHz already. I'm looking for something more complicated
than basic DC receiver with 2 transistors + LM386.

if you already have a DC receiver, all you need to do is add a simple
ladder filter to the input of the DC receiver, add a mixer to the
otherside and a VFO. You will have a pretty decent superhet. Don't
throw away the DC receiver, just build up a superhet around it.

You current VFO can be moved up to being the Local oscillator for the
superhet. Two or three crystal filter at the input of your current
product dectector should provide you with bright quality of filtering.
On the front-end just use a single FET with a post-mix amp. check my
transceiver for the idea at http://farhan.co.net.nr.

The actual receiver that served as the basis of the transceiver is
called S7C by OM Wes Hayward. It is in EMRFD. You should get a copy of
the book if you are serious about understanding and homebrewing.

- farhan