QRP Station > Builder's Corner

UHF Crystal Radio

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vu2nan:
Yet another!

The terminal block arrangement made it convenient to replace the folded dipole with a full wave loop.

Likewise with an AWX antenna.

Results were as good as with the folded dipole.

73,

Nandu.

vu2nan:
The latest update!

A second Yagi Beam was then rigged up, with another diode providing the return path for the audio, instead of the coil.

The signal strength was not as good. During trials, a chance shorting of the second diode gave a considerable increase in signal strength.

The diode and capacitor were hence discarded. Performance of this single-diode UHF crystal radio is quite good.

73,

Nandu.

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