[AMRadio] Liftin center tap to kill B+


CL in NC via AMRadio amradio at mailman.qth.net
Thu Nov 20 09:19:44 EST 2014


Lifting the CT removes the return path.  That rectified voltage has to get back to the xfmr some way, and the CT is it.  An xfmr with no CT but using a bridge, the bridge swaps each end of the TX secondary to ground on each half cycle, where as a full wave  CT only uses 1/2 the secondary on each half cycle. 

Charlie W4MEC in NC


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