Receive Converter 144MHz to 50MHz

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The converter uses no filters and is thus pretty broadbanded. All selectivity is trusted to the DB6NT converter and the Yaesu radio. The power supply is regulated by a three terminal voltage regulator, so the frequency won’t shift with input voltage fluctuations. The converter applies 13.8V to the coax line going to the antenna-mounted converter, so that one doesn’t need a separate power cable.

Adjustment of this circuit consists simply in tuning the three coils to maximum signal, then retouching L1 to obtain the precise frequency.

VIA

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