[ARC5] ARC types -15 to -17

[David Stinson]

I have documentation on the A.R.C. types -15A and -15D
 (Omni DF, localizer and Comm receiver in one package).

Nothing on the type-16.

I have a manual for the type-17 (VHF comm set).

Almost nothing on the type-18 (VHF transmitting set, 
 used with the type-15 to provide communication 
 according to a 1946 A.R.C. advertizement).

Does anyone have any specific documentation on the 
type-16 or type-18 sets?

Thanks.