Vintage US Army RT-68/RTG Schematic Diagram On Silk/Nylon Fabric Korea/Cold War For Sale

Rare and highly desirable field schematic diagram for the U.S. Army Receiver-Transmitter RT-68/GRC, printed on durable silk-like fabric (nylon or rayon). Measures approximately 30” long × 8” wide.

These fabric schematics were issued to military radio technicians and repairmen because they could be tightly rolled, carried in a pocket or tool kit, and survived moisture, oil, and rough field conditions far better than paper. Yours still has its original-style fabric tie strap.

Details:

• Clearly titled “RECEIVER — TRANSMITTER RT-68/GRC SCHEMATIC DIAGRAM”

• Includes full schematic, crystal frequency chart, parts placement tables, notes, and service information

• Drawing numbers: SG-D-40609-A (or SC-D-40609-A) and R-235855-D / R-235856-D

• Part of the RT-66 / RT-67 / RT-68 series used in the AN/GRC-7 and AN/GRC-8 radio sets (VHF FM, ~38–55 MHz)

• Used in vehicles, tanks, and command posts during the Korean War era and early Cold War

Provenance:

Came from the estate of a military radio man, Sgt. in Army during the Korean War. Found rolled up in a box of his belongings. He had an abundance or ham radio equipment and parts as well.

Condition:

As shown in the photos. Fabric is intact and flexible with clear, legible printing throughout. Minor age-related toning and creasing from being rolled is normal for these items. No major tears or damage noted. Please examine all photos carefully.

These fabric technical diagrams are much scarcer than the paper versions found in the technical manuals and are prized by military radio collectors, restorers, and ham radio operators working on RT-68 and related sets.

A fascinating and practical piece of early Cold War military communications history.

Ships carefully rolled or flat-packed in a protective box. Combined shipping available on multiple items. Thanks for looking.