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| Minimalist UHF Crystal Radio - Schematic |
Using this simple setup, digital signals from the nearby cellphone tower were received on the shack roof.
Related post: Some thoughts on UHF Crystal Radios
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Minimalist UHF Crystal Radio
Here's the schematic of the minimalist version of my 'UHF Crystal Radio'.
It was wired on a terminal block.
Using this simple setup, digital signals from the nearby cellphone tower were received on the shack roof.
Related post: Some thoughts on UHF Crystal Radios
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Using this simple setup, digital signals from the nearby cellphone tower were received on the shack roof.
Related post: Some thoughts on UHF Crystal Radios
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Compact Loudspeaker Crystal Radio
This is the compact version of my 'Loudspeaker Crystal Radio'.
Trials on a number of assorted audio transformers, from the junk box, were not in vain. A push-pull output transformer, intended for a 1 W germanium transistor audio amplifier, gave excellent results.
The centre-tap on the primary is not used.
A discarded blister pack serves as the base.
In spite of its small size, performance is as good as that of its counterpart.
My 'Homebrew Horn Speaker' and 60' wire antenna offer the perfect match for this crystal radio.
Related post: Alternative Detector for a Shunt-fed Crystal Radio
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| Compact Loudspeaker Crystal Radio |
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| Compact Loudspeaker Crystal Radio - Schematic |
A discarded blister pack serves as the base.
In spite of its small size, performance is as good as that of its counterpart.
My 'Homebrew Horn Speaker' and 60' wire antenna offer the perfect match for this crystal radio.
Related post: Alternative Detector for a Shunt-fed Crystal Radio
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