[Milsurplus] TBW Transmitter power-ON - filament wiring

[Richard Brunner]

Addendum:  Measured heater voltage on the 837 driver stage, 12.67 volts
rms.

Richard, AA1P


On Thu, 2009-06-04 at 09:35 -0400, Richard Brunner wrote:
> OK Gang:
> Actual measurements on 800 cycles; panel voltmeter set on 10 volts,
> T-202 terminals 9 to 11, 16.04 volts measured with a true rms meter.
> 
> The 837 heater is 12.6 volts at 0.7 amps, so the voltage drop through
> R-312 (4.5 Ohms) is 3.15 volts; 3.15 plus 12.6 is 15.75 volts, which is
> good agreement.  There is fractional voltage drop through the wiring, so
> the 837's are probably right on.  Gotta run now, but might measure the
> 837's later.
> 
> Richard, AA1P
>