Tuesday, 8 March 2011

Low Cost ATU for QRP rigs


The circuit shows simple low cost ATU for QRP transmitter projects. The coil is wound on a 12mm ferrite rod, which can be junked from old radio receivers.The wire will be 20swg and  the winding should occupy 4cm long.VC1 and VC2 are 365 pf Variable condensers used in radio receivers.

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