Join Date: Apr 2009
Location: Toronto (St. Clair/Bathurst)
A search turned up nothing about crystal radios at this forum - such as my 1958 Heathkit CR-1.
For sure, this kit does not have a crystal and a cat's whisker needle to feel-out the rectifying spot on the diode. The kind I remember from my childhood - and still a great learning experience for kids today. It has a germanium diode.
The Heathkit has two tuning capacitors and a switch to switch-in two more fixed capacitors for tuning, none of them ganged. Works good!
At the University of Chicago, we strung a few hundred feet of wire out the 3rd floor apartment back porch and into a tree and got reception from hundreds of miles away.
I believe I hooked it up to my HiFi and got excellent sound, atmospheric static excepted. The sound with the primitive headphones was OK too, if not "crystal" clear.
Question: is the sound from a crystal radio truly HiFi in the sense that it is a pure demodulation of the radio wave with no active elements?
eBay has these sets for around US$50 plus shipping.
midtown Toronto, DB4e, 60ft RG6, 8dB distr amp
FM: Sony STSA-50ES, Wine.6065, 40ft RG6