This is a digitally copied and enhanced
Dept. of Army technical manual TM11-856; Air Force TO
31R1-2URR-154 (Collins R-390/URR). It
is clear,
clean, and easy to read. It is printed on premium 24# paper with heavy covers and
bound with a plastic comb. No more struggling with unreadable photocopies!
The TM11-856 manual measures 8 1/2" X 11" with about
137 pages plus
36 large one piece
fold outs or
sheets.
Topics include: introduction, description,
operation, organizational maintenance, theory, filed maintenance, alignment
and adjustment procedures, shipment and limited storage and demolition,
voltage diagrams, parts location diagrams, and index.
The one piece foldouts include:
-
23" First and second IF amplifiers
-
17" Third an forth IF amplifiers
-
19" AGC circuit
-
19" Voltage regulator circuit
-
17" Assembly instructions for
multiconductor cables
-
30" RF gear train
As per the original 30 additional sheets are
provided in an envelope:
- 17" Block diagram
- 17" Antenna circuit and first RF amplifier
- 17" Second RF amplifier
- 17" First mixer stage
- 17" Fifth and sixth IF amplifiers
- 19" AF amplifier
- 17" Line audio channel
- 19" Power supply, PP-621/URR
- 17" Filament and oven circuits
- 17" Break-in circuit
- 23" Mechanical tuning system block diagram
- 17" Tuning system exploded view
- 17" Assembly instructions for cable No. 1
- 17" Tube voltage and resistances for top deck
- 17" Tube voltage and resistances for bottom
deck
- 17" Terminal board voltage and resistance
diagrams
- 23" AGC voltage distribution
- 30" B+ voltage distribution
- 19" RF subchassis wiring diagram
- 23" Crystal oscillator subchassis wiring
diagram
- 17" VFO subchassis wiring diagram
- 17" IF subchassis wiring diagram
- 17" AF subchassis wiring diagram
- 17" Calibration oscillator subchassis wiring
diagram
- 17" Power supply PP-621/URR wiring diagram
- 30" Main frame wiring diagram
- 23" Subchassis and interconnection diagram,
part 1
- 23" Subchassis and interconnection diagram,
part 2
- 34" Schematic diagram, part 1
- 38" Schematic diagram, part 2
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