[Milsurplus] ( was Japanese Chair ) GO-9, TBW A3

[WA5CAB at cs.com]

First, hams in at least recent years always seem to write the RCAF radio 
nomenclatures as AR-2, AR-6, AT-1, AT-7 and AT-12. The USAAF manuals uniformly 
show them as A.R. 2, A.R. 6, A.T. 1 and A.T. 7. But do show AT-12 (or in 
one place, AT 12). So if you are searching a database or online, run the 
changes on all variants before giving up.

Second, T.O. 08-45-25 on the AT-12 does not mention any specific receiver. 
TO 08-45-26 on the AR-2 and AR-6 only mentions the AT-1 and AT-7 (but as 
A.T. 1, etc.).

My copies of the three manuals (T.O. 08-45-25, -26 &-27) are 2nd generation 
or worse copies made on early copying equipment and while the text and 
schematics cleaned up pretty well, the photos are. with few exceptions, 
terrible. Fortunately, the photo of the complete AT-12 Canso installation and of the 
front of the A.R. 2 are the best of the lot.

Go to http://imagehost.vendio.com/a/3491303/view/AT-12Canso.jpg for the 
AT-12 photo.

One other comment - the similarity between the AT-12 and the GO series is 
more apparent than real. The center unit in the GO is the power supply. The 
center unit in the AT-12 is a second LF transmitter. The Modulator-Power 
Supply is a separate unit that bears no resemblance to the transmitters.


In a message dated 03/05/2017 01:37:29 AM Central Standard Time, 
Kargo_cult at msn.com writes: 
> RCAF somehow had a different philosophy. Their AR-6 + AT-12  pair, used 
> in RCAF "Canso" PBYs, had a transmitter similar in some ways to the the 
> GO-9, but.
> There were 2 sections, LF and HF, and a power supply - modulator.  No one 
> that I know of, knows what or even IF there was another command-type radio
> onboard. Unfortunately, so far no photos online of the AT-12. Seems not 
> many survived, of not many built, and it further appears NO LF sections or 
> PS-modulators
> survived. Writing has been around, what, 5000 years? and it seems only 
> recently were thorough attempts started, to catalog all past technology. 
> 
> Not much documentation on USCG or RCAF equipment, seem little known about 
> these areas.
> -H 

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