Amazon.com: Echo Board for CB Radio - Workman BB2 : Electronics
Meet the Microbitx: A Simple to Build, Yet Challenging All-Band Transceiver Kit | Nuts & Volts Magazine
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Capsplosion in a two-way CB radio - Need help identifying melted parts (photo warning) | Electronics Forums
PSSST! Here's A Novel SSB Radio Design With Only Seven Transistors | Hackaday
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Convert CB Transceiver to 50MHz - Arduino Project Hub