Monthly Archives: April 2017

DIY Magnetic loop

How it works: A loop antenna is effectively a tuned RLC circuit. What does this mean? It means the primary coupling loop inductively couples to the secondary. The secondary loop has a variable capacitor to electrically adjust its resonance. Alternatively, Some … Continue reading

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New (to me) projects on the bench – Part 3

  8) EICO Model 221 Vacuum Tube Volt Meter Whenever I get a new (to me) piece of test equipment that is older than 25 years I always want to look at the capacitors. They are almost surely leaking. I … Continue reading

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Tecsun 2P3 AM Radio build

Tecsun 2P3 AM Radio Receiver Kit – DIY for Enthusiasts, Built it into a radio case ! Bought from Amazon…. This was a fun build. I love the way it is set up similar to the way old radio projects … Continue reading

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40M CW Transmitter QRP Pixie Kit Receiver

Wandering around on Ebay, I found myself looking again at the Pixie QRP morse code transceiver. I purchased for $15 from seller “19d10recon” and got 2 crystal frequencies to use. Laying out the parts I found I was missing 2 but … Continue reading

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New (to me) projects on the bench – Part 2

Started going through the bench stuff from Craigslist: 2) B & K Precision 177 VTVM Dynascan Vacuum Tube Volt Meter Tester – Works, nothing needed. 3) Superior Electric 3PN 116B Variable Powerstat Auto Transformer 109A 0-140 VAC – Works, nothing needed. … Continue reading

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