[Milsurplus] AC supply for TBY, more

[WA5CAB at cs.com]

Not that it makes a lot of difference but I would say that P.H.N.Y, is more 
likely to be Pearl Harbor Navy Yard.  Philadelphia is more commonly 
abbreviated as PHILA.  And for single letter abbreviation, it would be P.N.Y. 

In a message dated 12/29/2017 17:53:42 PM Central Standard Time, 
Kargo_cult at msn.com writes: 
> Herewith photos of the TBY AC power supply I found. TBY = Navy, Marines 
> back pack VHF radio, early WW2; also carried on ships as emergency VHF 
> voice; 
> 
> also on cargo vessels in convoy for voice communications on 72 MHz to 
> preclude U-Boat discovery.
> 
>  When I opened the unit, I found a folded schematic. Thank you ever so 
> much, someone there in the past, for leaving this in there !  The schematic is 
> captioned 
> 
> "TBY POWER UNITS DESIGNED AND BUILT AT P.H.N.Y.    HALLER"  Thank you Mr. 
> Haller !  I looked up "P.H.N.Y." and it was "Philadelphia Navy Yard". 
> 
> One thing that helps date this to WW2 is that the schematic indicates 2 
> versions. "Note #2 Battery case added to rectifier unit when 'A' battery 
> rectifier is not
> 
>  available."  The rectifier referred to is a large selenium rectifier. 
> Apparently supplies of this part were limited. This is the same style and 
> approx. size part seen in the
> 
>  TBX receiver A.C. supply.  This unit uses a #80 tube for the B+ voltages. 
> The knob is for adjusting the overall A voltages. If the schematic hadn't 
> been there,
> 
>  I would still be puzzled as to the manufacture. I didn't guess Naval 
> facility because based on what I'd seen in the past; I would expect the 
> nameplate to 
> 
> proudly identify the source. The "Radio Lab" name still puzzles me. I 
> don't know what that might be about. A small unit for working special radio 
> fixtures
> 
>  and such for ships?
> 
>  -Hue 
> 
> 
> 
> 
> 

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
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