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Karl Matthias 🇺🇦
@relistan@mstdn.social  ·  activity timestamp last month

Mixer and audio amp work! Don’t have the rest of the Soldersmoke direct conversion receiver done yet. But I used the digital VFO for my 2m radio homebrew project to feed the LO port on the mixer. Used my 2m FM HT to give some signal toward the exposed end of the coax. At first I heard just screeching. Then realized one side of one toroid was backward phase. Fixed that and could hear myself on the speaker! 🔊 #HamRadio #AmateurRadio

Four circuit boards hooked together. Digital VFO at the top, audio amplifier center, double balanced mixer left, 9v power supply upper left.
Four circuit boards hooked together. Digital VFO at the top, audio amplifier center, double balanced mixer left, 9v power supply upper left.
Four circuit boards hooked together. Digital VFO at the top, audio amplifier center, double balanced mixer left, 9v power supply upper left.
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Karl Matthias 🇺🇦
@relistan@mstdn.social replied  ·  activity timestamp last month

To be clear, FM does not and will not sound good on this radio. But it was copyable and good enough for proof of life 😀

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Karl Matthias 🇺🇦
@relistan@mstdn.social replied  ·  activity timestamp last month

That 78L09 is hanging off an HP platinum server power supply. I need to make a better setup for safety though. But that is a really great power supply. It was €11 + 15 shipping which is just crazy for such a good power supply.

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