[ARC5] [Milsurplus] ATD Transmitter Longwave Tuning Unit Repair

[Hubert Miller]

I looked up the freq range of the Japanese long distance aircraft transmitter 96 Ku Mark 3.
As shown in Hiroki Kato's article in QST, freely available 
http://www.arrl.org/files/file/QST/This%20Month%20in%20QST/April2016/KATO.pdf
and I see the low band is 300 - 500 kHz. I previously suggested the MF aircraft use for 
homing, and I still think this valid, but everything I have read, from combat accounts to
memoirs of Japanese pilots, I found no evidence so far that they used it for such. 
I know that in northern latitudes, LF communications had to be resorted to sometimes
when HF was out, maybe due to winter auroral conditions? So maybe the LF was a 
fallback in case HF just didn't do it? Also, I wonder if MF was not subject to the "skip
zone" complication. ( I suspect skip zone no-signal areas may have had something to 
do with the crash of Amelia Earhart. )  

I think Hiroki is wrong about this 96-3 transmitter being on any carrier based plane. In
fact, I would bet money on it. I know it was used in "some" Betty bombers and also in
the big Kawanishi flying boats. However I have also seen evidence that some Betty 
bombers only carried VHF equipment, the standard 44-50 MHz band, and no HF.
-Hue Miller