[Milsurplus] Mystery Instrument found in Washington State

[Hue Miller]

Looking thru a LIFE magazine for 28 Sept. 1942,
I see an article on pilot training. It portrays an
Army training plane which looks like a Beech
18 to me, I don't know enough to name the B-
or T- type. I see 3 control boxes above the pilots.
One is a ADF control box, looks like for the SCR-269 ?
Then two control boxes, black, that must be
SCR-283. The receiver one does not have the CW/ AM
switch, of course, but the transmitter box seems
to have a CW button over on top right. I don't 
understand that. 

Looking across the web for some SCR-183 control
box photos, I came across other items of interest.
One old posting from 1999 states that ASW patrol
lighter than air craft carried TCS. Is that right? 
Certainly is different from the cabin photo I have
seen. Also I saw this, 
http://tarawaontheweb.org/billeads.htm
Marine Corps tank radioman trained on RU-GF, 
which sets were removed and replaced after
Saipan experience. RUGF in Sherman tank?
Truly odd. Must have been replaced with VRC-3,
is that the BC-1000 with the vehicle PS?
-Hue Miller