[Milsurplus] AC supply for TBY, more

[Nick England]

FWIW, Pearl Harbor Navy Yard, not Philadelphia.
https://www.ibiblio.org/hyperwar/USN/ref/OPNAV_29-P1000P.html



On Fri, Dec 29, 2017 at 6:53 PM Hubert Miller <Kargo_cult at msn.com> wrote:

> 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
>
>
>
>
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-- 
Nick England K4NYW
www.navy-radio.com
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