[AMRadio] Stancor Modulation Transformer Wiring?

[Jay Bromley]

http://www.amwindow.org/tech/htm/modtran/stancor/stancor1.htm

Hi Steve,
Would the above link help?

73 de w5jay/jay..


Hi !

I'm modifying a Ranger transmitter, and am replacing the existing modulation
transformer with a Stancor A3893.  This, along with a direct-coupled audio
driver, running the modulator (using 6DQ5s) in AB2 (with plenty of negative
feedback) should result in an excellent sounding driver for my friend's
linear amplifier.

I am not sure of the wiring of the A3893, and can't seem to locate a wiring
diagram.  I've traced it out, feeding low voltage into one side and
measuring the output on the other.  The turns ratio, full primary to full
secondary is about 1.176:1 .  This will work very well, and the modulator
should be able to deliver enough audio to modulate the carrier around 180%
positive.  There will be a 3-diode negative peak limiter as part of the
modulator.

Does any one have a diagram for these Stancor transformers, or at least know
which is the "primary" and which is the "secondary"?  As long as either side
can withstand unbalanced DC, it really doesn't matter which is which, but it
would be nice to know the "proper" wiring.

Thanks and Regards,

Steve