[Milsurplus] What Are They ?

[WB6BLV (DM06)]

I was at a swap meet on Saturday and the following items followed me home;
my best guess as to what they are is listed after each; any information you
may have will be appreciated...

BC-983-A      modulator for some transmitter?
TS-306/ARW   test set for VHF lo 10 chan FM transmitter/receiver inc
deviation?
TS-375A    mil vtvm  ?
FRC-6A      VHF lo  transmitter/receiver pair  (had a set a decade ago)
TG-10-F    code practice machine - this one has only the oscillator and
power supply, the tape transport and reader have been removed.

thanks

John   WB6BLV at inreach.com