After cleaning out a house the elders left, I found a military radio crystal box full of crystals that controlled send/receive frequencies..120 of them in the 40 meter frequencies. I was a Novice radio hobbiest over 60 years ago, but have long since lost interest. Question: is there any value to these plug-crystals it they are crystals (in little metal cans with two prongs)?
- Thread starter IaLeo
- Start date
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