|[AMRadio] Liftin center tap to kill B+|
w5jo at brightok.net
Thu Nov 20 10:41:44 EST 2014
No the circuit is a full wave rectifier as opposed to half wave which
requires different handling and normally not used in HV circuits for
Yeah but Jim says he has a full wave bridge.
anyway, I'd check the voltage at the center tap when it is lifted.
Nothing happens magically. There as to be a reason the caps blew.
On Thu, Nov 20, 2014 at 8:19 AM, CL in NC via AMRadio <
amradio at mailman.qth.net> wrote:
> 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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