Army Technical manual TM 11-851 for the R-274A/FRR, R-274C/FRR, R-320A/FRC, R-483/FRR, & R-483A/FRR 
(Hammarlund SP-600), reprint.

sp600.jpg (19147 bytes)

sp600.jpg (19147 bytes)

 

This is a digitally copied and enhanced Army technical manual No. 11-851.  It is printed on premium 24# paper with heavy covers and is bound with a plastic comb.  No more struggling with unreadable photocopies!

It measures 8 1/2" X 11" with about 196 pages plus six  large one piece 11" X 48" fold out schematics printed on 20lb. bond.  This is a very comprehensive manual!  Dated October 1953.
Chapters and sections include:

  1. Introduction
    1. General
    2. Description and data
  2. Operating Instructions
    1. Service upon receipt of Radio Set SCR-244-D
    2. Controls and instruments
    3. Operation under usual conditions
    4. Operation under unusual conditions
  3. Organizational Maintenance Instructions
    1. Organizational tools and equipment
    2. Preventative maintenance services
    3. Lubrication and weatherproofing
    4. Trouble shooting at organizational maintenance level
  4. Theory
  5. Field Maintenance Instructions
    1. Trouble shooting at the field maintenance level
    2. Repairs
    3. Alignment procedures
    4. Final testing
  6. Shipment and Limited Storage and Demolition to Prevent Enemy Use
    1. Shipment and limited storage
    2. Demolition of material to prevent enemy use
  7. Appendices:
    1. References
    2. Identification Table of Parts
  8. Index