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Better Than I Thought

A project log for Shortwave Crystal Radio - A blast from my past

Building and tinkering with crystal radios goes back to my childhood of the late 1960's and coming round again.

dr-cockroachDr. Cockroach 07/16/2023 at 00:480 Comments

July 15, 2023 - This little hay wired receiver is better than I was expecting. Between July 5 and today I have copied on 40M CW, 61 stations from States all along the east coast from Florida to Maine and west to Indiana with the best being PY7XC in Brazil. Remember that this receiver is just a crystal receiver with a Local Oscillator loose coupled and a lot of audio amplification and no RF gain stages at all. The antenna is just a 35 foot wire and NO ground connected. The CW filter on the proto board helps a lot as well as the wave trap on the antenna input. I also made a slight improvement by adding a Bogan T725 audio transformer between the detector and the CW filter. Direct Conversion at its most sloppy but it works so well.

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