Jack Schmidling wrote:
Mike Andrews wrote:

Note also that you'll need to remove the copper shunt, if one is
present, from the transformer laminations, _and_ that one side of the
HV winding may be grounded to the XFMR frame.

Never gave any thought to this but the one problem I see is that I need
a center tapped transformer to use with 866's and the microwave ones do
not seem to be.

It is not, no. You can use two out of phase, but that kills your volume
requirements.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Scott Dorsey wrote:

It is not, no. You can use two out of phase, but that kills your volume
requirements.

Roger but how does one "out of phase" two transformers?

js



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Jack Schmidling wrote:
Scott Dorsey wrote:

It is not, no. You can use two out of phase, but that kills your volume
requirements.

Roger but how does one "out of phase" two transformers?

Okay, each transformer has the righthand side of the secondary tied to
ground.

So, you apply AC to the primary, with the hot on the left and the neutral
on the right to one transformer, but the hot on the right and the neutral
on the left to the other transformer. So the polarity is reversed between
the two.

Now you have two outputs, each very high voltage with respect to ground,
but out of phase. This is just like having a center-tapped transformer
of twice the output voltage, but with the center tap grounded.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."