[Milsurplus] More Navy radio in China 1944 - 1945

[Hue Miller]

----- Original Message ----- 
From: <W7QHO at aol.com>
> Agree this was probably a TBW but some of the description doesn't fit.   The 
> TBW ran off 115 volt, 800 (not 400) cps   primary power provided by one of 
> several MG sets, one of which included a gasoline engine.   Others were driven by 
> 115/230 volt 60 cycle and 115/230 volt 25 cycle single phase motors.   The 
> same 115 volt, 800 cycle generator made by Onan (not Olin) was used with all MG 
> sets.   These generators howl like a banshee which could be the "whine" 
> reported in the reference.   None of the MG sets could be properly called a "
> rectifier power supply" but the TBW did include a "Modulator and Rectifier Power 
> Supply" unit normally mounted between the HF and MF transmitter sections.   No 
> mention of a diesel powered MG set in my 1942 Westinghouse manual, but something 
> like that could have been kluged up in the field.
> 
> The TBW was officially rated at only 100 watts out on CW/MCW and 25 watts on 
> phone, but   this may have been minimum, worst case values.   Can't see 
> getting more than 200W CW out of one, though.   Still a lot more than a TBX.   The 
> TBW also came with a humongus antenna system which could account for it's 
> reported performance advantage over the earlier "7 megacycle" radio.
> 
> Dennis D. W7QHO
> Glendale, CA

So there are more mistakes in this quote than i had found. I attribute these maybe to
a second-hand conversational account, plus the author's unfamiliarity with the radio
topic, so he would accept whatever he was told, on this topic. So lets correct that
to something like, 

"A 300 watt input TBW portable transmitter, which could operate on low frequencies
thru 18,000 kilocycles, which had an 800 cycle power supply that  was run from a gas-
engine generator, replaced the usual low power  TBX shortwave portable radio with its 7 
megacycle upper tuning limit , to provide communications with the fleet and with
Pacific headquarters." 

TBW input, as i recall, should be similar to GO, i think. GO ran 2000 volts 175 mA to
the 803. I think the TBW provided A2 as well as A1 and A3, so maybe this A2 
accounted for "punch", getting thru QRM ???
-Hue Miller