[AMRadio] Liftin center tap to kill B+


Rob Atkinson ranchorobbo at gmail.com
Thu Nov 20 10:20:24 EST 2014


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.

Rob
K5UJ

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
> ______________________________________________________________
> Our Main Website: http://www.amfone.net
> AMRadio mailing list
> Archives: http://mailman.qth.net/pipermail/amradio/
> List Rules (must read!): http://w5ami.net/amradiofaq.html
> List Home: http://mailman.qth.net/mailman/listinfo/amradio
> Post: AMRadio at mailman.qth.net
> To unsubscribe, send an email to amradio-request at mailman.qth.net with
> the word unsubscribe in the message body.
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>


More information about the AMRadio mailing list

This page last updated 23 Nov 2017.