ars.w5omr at gmail.com
Sun Dec 2 03:58:34 EST 2007
> Small world:
> I have the same 70 watt modulation transformer I think. It's for an
> FAA AM transmitter too. Two 6146's in the modulator side to one
> 4x150. Also has a tertiary winding for the PA screen. The idea here
> is to modulate a single 4-65a. It's the only glass tube I could find
> that matched the load impedance and has a screen grid too. If you can
> think of another glass tube that might match up, please let me know.
> I had the schematic for the transmitter (TV 6?) too but lost it
> somehow. I do have the pin out for the iron. If I remember correctly
> the transmitter was made by GE but don't quote me.
811's modulating 813's, or 4-125's would utilize the screen winding.
But, it's better than any 70-watt transformer.
this think is open frame, every bit of 8" from end to end, around 6 or
8" tall, and about 5 or 6" thick. Weighs around 40 or 50lbs.
Driving your AM Rig without a scope,
is like driving your car at night, without headlights. (K4KYV)
73 = Best Regards,
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