Archive for date: October 23, 2009

AA1TJ — “El Silbo”, a voice powered radio (complete with QSOs!)

October 23, 2009 | Amateur Radio | By: Mark VandeWettering

I subscribe to the very interesting QRP-L mailing list, and recently read an article by Michael Rainey, AA1TJ about an interesting radio and set of QSOs that he conducted. Michael’s experiments are amazing and cool, but I think his latest effort takes the cake: he had a number of QSOs using a transmitter powered entirely […]

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Zero Threshold MOSFETs…

October 23, 2009 | Amateur Radio | By: Mark VandeWettering

I don’t know why this percolated to the top of my consciousness today, but I thought I’d dump a link here so I can find it again. I recalled reading an article about the use of a particular special MOSFET device for use in crystal radios. It took me a tiny bit of time to […]

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