[Milsurplus] TBW Transmitter Meters

Richard Brunner rbrunner at gis.net
Sun Jan 15 14:10:25 EST 2006


David Stinson wrote:
> Could I please ask that anyone who has a TBW HF rig, please
> take detailed photos of the meters on the front and mail
> them to me?  I have one coming that is missing the meters.

They are all standard 2.5 inch Westinghouse black-faced meters.
HF  unit:
I.A. grid current     0-15 ma.
P.A. grid current     0-100 ma.
RF Amps               0-5

MF unit:
P.A. grid current     0-100 ma.
RF Amps               0-9

Power supply:
P.A. plate current    0-300 ma.
line/filament volts   0-150/0-15 vac

You will avoid lots of grief with keying and chirp if you use the 800 
cycle power supply.  It wants 120 volts, 700 va, at 800 cycles, provided 
by solid-state or rotary inverter.  I use the 800-1 aircraft inverter 
with excellent results. (Yes, I know it's noisy.)  The 800 cycle power 
supply provides a combination of grid-block and primary keying with 
excellent results.

Richard Brunner, AA1P


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