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One Chip 80m Receiver


The circuit is of an 80 meter band one chip DC receiver, (excluding the AF stage). As you can see the design utilises the NE602 as VXO/mixer. It is economical with components

I have spent a little time optimising the design and this is my latest version. The RFC value is 33mH and may be a bit over the top for the job. It was just one that I had in the junk box.

An ATU on the front end improves selectivity. Performance is quite reasonable considering the simplicity of design. I think other experimenters would be interested in it - perhaps it is possible to get the oscillator to drive a transistor allowing the circuit to be turned into a transceiver.


© 2001 - YO5OFH, Csaba Gajdos