[ARC5] Ideas on Japanese circuit ?

[Hubert Miller]

BTW, i now have the 99-1, 99-2, and 99-3 sets. The 99-3 has one less tube ( two fewer tube stages ) and is kind of
a simplified set for single place aircraft; voice A3 only. The conventional thinking and photos ( Monogram book ) 
show the 99-3 receiver hanging below the instrument panel, with a couple instrument meters below the receiver.
However the 99-2 i have, is in one cabinet, and WAS mounted below the instrument panel. This seems to have 
flummoxed the aircraft authorities. However, the 99-2 i obtained from the fellow ( God bless him ) who harvested
it from a shot in half single seat plane near Pusan, Korea, in 1946. We were unable to further identify the aircraft.
It did have a 3 blade prop. Which the MPs confiscated at SF CA, God knows why. That would seem to narrow it 
down to type 'Oscar' or 'Tojo' fighter, or maybe a recon version? Why a CW capable set in a single seat fighter? 
Of course, "never say never" especially applies to Japanese militaria. One reader here tells me his father saw fuel
lines made of bamboo in Japanese planes, and empty cutouts where meters went bad and couldn't be replaced.
-Hue Miller