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20m Projects - Receivers

Click to enlarge14,068 MHz receiver by LY3LP

Click to enlargeDirect Conversion Receiver using NE612 for HF Bands by VU2UPX
Most radio amateurs will be familiar with the technique of radio reception by Direct Conversion. The signal from the antenna are fed via input tuned circuits to a mixer or product detector. Here the rf signals are tuned into audio signals, by mixing them with a local oscillator.

Click to enlargeJaçanã - 20m CW Superhet Receiver by PY2OHH
A receiver for the 20m band, simple, cheap and with easily available parts in the national (brazilian) market, even by mail order.
It is a superheterodyne type, which is really necessary from this frequency upwards.

Click to enlargeLM386+AN7205 simple 14Mhz receiver by LY3LP

Click to enlargeRecepteur a Reaction 20m de F5LVG
Une détectrice à réaction est un récepteur simple relativement sensible du fait de la réaction. Ce procédé consiste à réinjecter à l'entrée d'un amplificateur une partie du signal de sortie qui est alors réamplifiée, ..

Creation date : 12/08/2007 @ 20:05
Last update : 16/09/2015 @ 18:15
Category : 20m Projects
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