[Milsurplus] "Rare" Gear

[Hubert Miller]

That really is a strange, interesting kink, early version being the -A,
compared to no-suffix later model. 

I was recently looking at a "Squadron Signal" publication on a scout
observer aircraft ca. 1930s. One interior photo shows what is maybe

a GP-6 or earlier, but it looks like a mockup maybe, as the meter positions
have no meters installed. This had me kind of wondering on

how many earlier radio setups, the contract for the aircraft drove the
contract for the design of the radio. I think the ME-1 would be an

example of that, 1929, for s specific 2-seat plane, a Corsair of some type. 

-H 

 

From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of
WA5CAB--- via Milsurplus
Sent: Sunday, August 7, 2016 2:09 PM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] "Rare" Gear

 

Bit of trivia.  

Actually, it's GP-6A, 
Serial Number 1 to 700
GP-6,
Serial Number 701 to 1987
and GP-7.
Serial Number 1 to ????

Using organizations having sets S/N 1 to 700 were instructed to stamp a
letter "A" on the nameplate after the "6".  My guess is that most didn't
bother.  The difference was that S/N 1 to 700 had a 4-pin power connector
and 701 up had 6 pins..  The two control boxes were also different
mechanically but the same electrically.  So the Navy Type Number was not
changed.  Why they didn't call the later ones GP-6A the manual doesn't
explain.  But my guess is that Westinghouse had already bought all of the
nameplates and didn't want to spend the money to make new ones.

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

In a message dated 08/07/2016 14:45:56 PM Central Daylight Time,
scr287 at att.net <mailto:scr287 at att.net>  writes: 



A few differences between the GP-3 and the later GP-6 or 7. Slightly
different front panel layout, different parts layout internally, and the
tuning units are not interchangeable between the earlier and later sets.
I have no documentation on the GP-3, so can't comment on any
circuit differences.

Jack Antonio WA7DIA/4

 

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