Transistor Radio Series - The 7 MHz Scratch Synthesizer

I like making simple component-level radios. This Fall, I rekindled my love for making transistor radios and hope to slowly blog some circuits and fun. I’m warning you now — these circuits hearken the 1970s and 80s, SSD, EMRFD, old issues of Ham Radio and other stuff that require no coding skills.

For the Ham 40 meter band, I thought about employing an Si5351 for the synthesizer — naw. While this chip poses a great choice, I wanted something a little more organic. If you go the Si5351 route, I recommend you consider the offerings by EtherKit. Jason toiled to improve the Arduino code library for this and perhaps you might support his future efforts?”


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