[Milsurplus] US Army Historic SSB Radio Set AN/GRC-108 (XC-1)

[Jim DiMauro]

I just purchased some military radio equipment from an estate.  The
equipment was part of a US Army experimental single sideband radio set.  The
equipment came with a set of Army photos.  One of the photos shows a name
plate on one of the walls of the shelter.  The plate reads: Signal Corps, US
Army; Experimental Single Sideband Radio Set; AN/GRC-108 (XC-1); Fabricated
by Sacramento Signal Depot, Sacramento 1, California.

The photos show a small, truck-mounted shelter.  The complete setup inside
the shelter included two teletype machines, two R-390/A receivers, a product
detector, a frequency shift converter, loudspeaker LS-206A/U, a SC-910E
exciter, a receiver stabilizer, a Gates RF power amplifier and a B&W 39-1000
antenna tuner.  I have one of the R-390/A's, the SC-910E exciter, the Gates
amplifier, the loudspeaker and the B&W tuner.  The serial numbers of the
exciter and the loudspeaker are visible in the photos, and they match the
equipment I have, so I have some of the actual gear from this historic
station.  The serial number of the exciter is #1, manufactured by General
Dynamics.

I need help with any documentation or information that may be available on
this station.  I have the manual for the exciter, but there is no
information on the Gates PA.  Other than the Gates logo on the front panel,
there are no model or other identifying numbers on the unit (I have only the
RF deck; the power supply that sat in the rack below it in the photo had a
model nomenclature  plate, but it is unreadable in the photo).  The amp runs
a 4CX-1000A.  I took a couple of photos of the PA that I can e-mail to
anyone who might be able to help.  I'd hate to see this historic equipment
rot away, or even be cannibalized for its wealth of parts.  I want to
restore it and put it on the air, but I need information on the Gates
amplifier, particularly a print and operating instructions.  I can easily
build a power supply, but I need whatever info I can find.  Can anyone out
there help, or offer any leads?

Jim