R-1051/URR Navy Receiver Info

2-30 Mc Solid-state synthesized receiver (with 2 tubes in RF input)
First IF 20 to 30 MHz, second IF 2.85 MHz, third IF 500 kHz
Designed by General Dynamics & manufactured by several others

r1051b-diagram-01.JPG (658920 bytes) r1051b-diagram-04.JPG (837879 bytes) r1051b-diagram-03.JPG (1101915 bytes) r1051b-diagram-02.JPG (816534 bytes)
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R-1051 front

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R-1051 rear

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R-1051
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R-1051
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R-1051
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R-1051
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R-1051
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R-1051
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R-1051
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R-1051B front

r1051b-91.jpg (57657 bytes)

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R-1051B top
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R-1051B bottom
r1051-test-01.jpg (68242 bytes)
test harness from scrapped rcvr
courtesy WD9INC
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R-1051D front

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R-1051D tag

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R-1051D top
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R-1051D bottom
--
Unit below has an R-1051D tag, but has "Pull to Turn Off", card cage, phone jack covers, smaller fuse holders. Probably an F model?
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R-1051F? front

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R-1051D tag on R-1051F?

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R-1051F? - with card cage
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R-1051F?
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R-1051F?
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R-1051G front
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R-1051G rear
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R-1051G top
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R-1051G (replacement metal chains)
r1051g-1101.jpg (34420 bytes)
R-1051G
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R-1051G
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R-1051G
Side rack mount bracket drawing
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R-1051H
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R-1051H
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R-1051H
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R-1051H

Variants - comments thanks to David Wise

Model

Freq. Step

Chains

Front Panel

Circuits

Manual

Manuf / cost

More
Photos

Other

R-1051/URR 0.5 kc steps metal chains dual meter discrete transistors + 
2 tubes
"six-pack"
1964 Navships 
0967-970-9010
1977 Navelex
0967-LP-970-9010
General Dynamics
$25,250
- -
1051: Two meters, 500cps steps controlled by 3-position rotary switch concentric with vernier.  Looks like a lever.
R-1051A/URR 0.1 kc steps metal chains dual meter discrete transistors + 
2 tubes
"six-pack"
- Elmer (Montedel) interior 
interior
-
Two meters, 100cps steps controlled by 11-position rotary switch concentric with vernier.  Looks like a disk, with one square notch cut out for Vernier position. Italian wording on modules (exterior unknown).
 A has RF AGC OFF toggle switch near LSB PHONE knob, and BFO Freq scale
R-1051B/URR 0.1 kc steps metal chains dual meter discrete transistors + 
2 tubes
"six-pack"
NAVELEX 
0967-LP-427-4010
MSB
0967-LP-427-4030
Bendix (Allied Signal)
$25,250
- -
Two meters, 100cps steps controlled by 11-position rotary switch concentric with vernier.  Looks like a disk, with one square notch cut out for Vernier position.
 No RF AGC OFF toggle switch, No BFO Freq scale
R-1051C/URR 0.1 kc steps metal chains dual meter
black face
discrete transistors + 
2 tubes
"six-pack"
supplement
TO 31R2-2URR-226-1
General Dynamics?
Radionics?
photo USAF
contract
Two meters, 100cps steps controlled by 11-position rotary switch concentric with vernier.  Looks like a disk, with one square notch cut out for Vernier position.
 C is like B but black front panel
R-1051D/URR 0.1 kc steps metal chains single meter SSI and MSI logic + 
2 tubes
"six-pack"
NAVELEX 
0967-LP-878-3020
MSB
0967-LP-878-3050
General Dynamics
$16,830
- -
One meter with L/Off/U toggle switch (one range, not switchable), AGC OFF/SLOW/FAST rotary switch, LINE LEVEL controls behind front panel.  New type lamps, replaceable from front, behind black "buttons".
R-1051E/URR 0.1 kc steps plastic chains single meter SSI and MSI logic +
2 tubes
"six-pack"
Navelex
0967-428-2010
MSB
0967-LP-428-2050
Bendix (Allied Signal)
$25,250
- -
Unknown
R-1051F/URR 0.1 kc steps plastic chains single meter SSI and MSI logic +
2 tubes
card cage
Navelex
0967-LP-617-7010
MSB
0967-LP-617-7020
Stewart-Warner
$21,210
- -
Unknown
R-1051G/URR 0.1 kc steps plastic chains single meter SSI and MSI logic +
2 tubes
card cage
NAVELEX
0913-LP-000-0800
Stewart-Warner
$21,210
- -
One meter, four sensitivity ranges on 9-position rotary switch beneath meter, small LINE LEVEL knobs above AGC OFF/SLOW/FAST switch, otherwise like D
R-1051H/URR 0.1 kc steps plastic chains single meter SSI and MSI logic +
2 tubes
card cage

EE125-AF-OMI-010
MSB
EE125-AF-MSB-010
/E110-R1051H
Stewart-Warner
$50,490
photo

photo

-
Significant ergonomic rework.  PHONE VOL knobs grouped with jacks, AUDIO LEVEL switch/meter/LINE LEVEL screwdriver-adjust pots grouped together, fuses below meter group, BFO knob grouped with mode selector, GAIN knob grouped with MGC/AGC switch and only used in MGC position.

Modules (just getting started - please email more info)  

Receiver A2A1
Mode Sel
A2A2 & A2A3
Rcvr IF/AF
A2A4
RF Amp
A2A5
Freq Std
A2A6
Trans/Synth
r1051-modules-01.JPG (803993 bytes)
R-1051 666230-015 666230-011 666230-019 666230-006
809000-200
666230-027
A09496-001
R-1051A - - - - -
R-1051B 666230-015 666230-011 666230-019 4013399-0701 2058940-0501
R-1051C 666230-015 666230-011 666230-019 - A00023-001
R-1051D A70638-001 A70244-001 A70229-001 A70744-001 A70733-001
R-1051E - - - - -
R-1051F - - - - -
R-1051G 4031967-0501 4031968-0501 4031959-0501 4013399-0701 -
R-1051H 01A229040-01 01A226058-22-11 01A226052-21-11 01A228785-01 99A228733-01
RT-618 n/a - - n/a n/a n/a
RT-618A n/a A70244-001 A70229-001 n/a A70733-001
RT-618B n/a 4031968-0501 4031959-0501 n/a 4031963-0501

NOTES
Freq Std 401399-0701 switch says COMP-INT-EXT
Freq Std 401399-0701 (modified) switch says INT/COMP-EXT NORMAL-EXT (OVEN STBY)
IF/AF A70244-001 adds AGC OFF-FAST-SLOW circuitry


A6 Translator/Synthesizer ("6-pack") Modules

Receiver A2A6
Trans/Synth
A2A6A1
1MC
A2A6A2
100KC
A2A6A3
1&10 KC
A2A6A4
500 or 100 cps
A2A6A5
Spectrum Gen
A2A6A6
RF Translator
R-1051 666230-027
A09496-001
666230-767 666230-626 666230-635
A09495-001
666230-643 (500cps) 666230-652 666230-660
R-1051A - - - - - - -
R-1051B 2058940-0501 666230-767 666230-626 A09495-001 2058937-0501 A00022-001 666230-660
R-1051C A00023-001 666230-767 666230-626 ? A00024-001 A00022-001 666230-660
R-1051D A70733-001 A70795-001 A70544-001 A09495-001 A70685-001 A00022-001 A70216-001
R-1051E - - - - - - -
RT-618 - - - - - - -
RT-618A A70733-001 A70795-001 A70544-001 A09495-001 A70685-001 A00022-001 A70216-001
RT-618B 4031963-0501 4032332-0501 4032331-0501 4032333-0501 4032330-0501 4032329-0501 4032328-0501

Links to info

mt3114a-ur-01.JPG (12113 bytes)
MT-3114A/UR shock mount