I wrote: >The control box C-118 or C-118A/ARC-3 and external volume control C-97/ARC-3, >with the even rarer FT-240 mounthing plate for the C-118, are not at all >common in the USA. That volume control should have been "C-197/ARC-3", not the somewhat visually similar "C-97/AIC-2" remote mic gain switch for the AM-26/AIC interphone amp. Mike / KK5F