direct conversion receiver

May 06

A PTO Kit From Ken WA4MNT at QRPBuilder

AA7EE

The Soldersmoke Direct Conversion Receiver was the first time I had ever built anything with a permeability tuned oscillator (PTO for short). I had never previously been that interested in them, due to the extra mechanical complexity over a standard LC circuit with a variable capacitor, or...

amateur radio ham radio permeability tuned oscillator pto ken wa4mnt wa4mnt qrpbuilder homebrew radio direct conversion receiver

Dec 04 2025

The SolderSmoke Direct Conversion Receiver

AA7EE

Well gosh. About a month ago, it was feeling as if every builder in the homebrew community had built the SolderSmoke Direct Conversion Receiver, apart from me. That’s a slight exaggeration, but I’d had a nagging feeling in the back of my head for quite a long time that I really ought to build it...

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