>> According to SIG 5, Mounting Bracket FT-475 was used in AN/VRC-1 > > It looks like this particular unit was in fact part of an AN/VRQ-1. A typo there, Jack. :-) The AN/VRQ-1 is the tactical FM set using two RT-66/GRC, two PP-109/112, and one C-435/GR in the MT-298/GR mount. Mike / KK5F