Navy HF Diversity Receiving Systems


HF Diversity Receiver Systems

model type primary use freq features
AN/FRR-3
AN/FRR-3A
frr3-spec-01.JPG (325534 bytes) Dual Diversity 2.4-23 mc
HF Shore FSK
Remote dial-up to select 5 fixed frequencies and 4 antenna combinations

frr3-block.jpg (352441 bytes)

frr3-spec-02.JPG (212320 bytes) manuf Press Wireless

TM 11-872 Manual extract

 

frr3-03.JPG (13268 bytes)

frr3-02.JPG (8189 bytes) frr3-01.JPG (146440 bytes) frr3-04.JPG (151526 bytes)
AN/FRR-10 frr-10-sys-02.JPG (95001 bytes) Dual Diversity
HF shore SSB
  (simultaneous USB & LSB)
variant of FRR-24

click here for info

2-32 mc dual diversity

253 tubes

Manuf National

info

AN/FRR-24 frr24-sys-01.JPG (138002 bytes) Triple Diversity
HF shore RTTY & CW

click here for info

2-32 mc triple diversity

420 tubes

Manuf National

info/photos

AN/FRR-28 frr28-01.jpg (84329 bytes)
two R-450/FRR-28 rcvrs
O-165/UR master oscillator
AM-615/UR amplifier/detector
KY-79/UR keyer
SB-224/UR patching panel
LS-187/UR speaker
r450-frr28-07.JPG (128743 bytes)
R-450/FRR-28
r450-frr28-08.JPG (107728 bytes)
showing AVC switch and ID tags
0.54-54 mc
Dual Diversity - HF shore

More R-450/FRR-28 photos 

used with AN/URA-8A RTTY converter

frr28_feb_1959.jpg (39720 bytes)
FRR-28 at NAVCOMMSTA Kodiak 1959

uses two Hammarlund SP-600-MX
(R-450/FRR-28)

manuf -
Northern Radio

info

SP-600 manuals

FRR-28 spec sheet - page 1

FRR-28 spec sheet - page 2

Manual - NAVSHIPS 91582
(available from Andy Moorer)

AN/FRR-32

frr32-01.jpg (150137 bytes)

frr32-02.JPG (123908 bytes)

Dual Diversity - HF shore system
2-32mc

two R-618/FRR-32 rcvrs
     (probably modified FRR-23)
O-330/FRR-32 master xtal oscillator
CM-70/FRR-32 comparator/keyer
SB-431/FRR-32 patching panel
LS-169/G speaker
CY-597A/G rack  

frr32-01.jpg (17511 bytes)

Manuf RCA

NAVSHIPS 92736 

AN/FRR-37 frr37-sys-01.JPG (155346 bytes) Dual Diversity version of FRR-24
HF shore RTTY & CW

Click here for component info

2-32 mc dual diversity
approx 250 tubes

Manuf National

info/photos

AN/FRR-38 frr38-01.JPG (135502 bytes) Dual Diversity FSK
two R-390(*) receivers
CV-116/URR dual FSK converter

frr38-03.JPG (76372 bytes)

frr38-02.JPG (150637 bytes)

0.5-32 mc

Receiver_Site_3.jpg (51312 bytes)
FRR-38 and FRR-41 at NAVRADSTA ( R) Salinas

Signal Corps procurement but used by USN

Manuf Collins & Hoffman

TM-11-647
TO: 31R2-2FRR38, 31R-1-8

AN/FRR-41 frr41-01.JPG (296023 bytes) Dual diversity SSB
two R-390(*) receivers
two CV-157 SSB converters
  (simultaneous USB & LSB from each)

frr41-02.JPG (104447 bytes)

0.5-32 mc

AN/FRR-38 and AN/FRR-40
FRR-38 and FRR-41 at NAVRADSTA (R) Salinas

Signal Corps procurement but used by USN

Manuf Collins & others

TM 11-649
TO: 31R2-2FRR-221

AN/FRR-42
AN/FRR-43
Subset of AN/FRR-24 Click Here for Info  -
AN/FRR-51 need photo Dual-diversity HF with 10 channel auto-tune
  • R-792/URR receiver (2 ea.)
  • CU-560/URR antenna coupler
  • C-2087/URR receiver control
  • C-2086/URR remote switching control
  • CV-116/URR FSK converter
  • CV-395/U Signal Data Converter
  • CY-1119/U cabinet
need info need info - please send e-mail
AN/FRR-55 Need photo and info
Experimental Prototype Only?
What was it?

All I have seen is this Unit B17 TTY Diversity Comparator

frr55-b17-02.jpg (120091 bytes) frr55-b17-04.jpg (227708 bytes) frr55-b17-07.jpg (247231 bytes)
frr55-b17-01.jpg (45954 bytes) frr55-b17-03.jpg (66865 bytes) frr55-b17-06.jpg (269726 bytes) frr55-b17-05.jpg (256016 bytes)
AN/FRR-60(V) frr60-02.jpg (240718 bytes)
photo from TMC vintage radio web site
 HF shore diversity system

guam-146.jpg (46764 bytes)
NAVCOMMSTA Guam - 1960's

 

More Info - AN/FRR-60 Page  

Manuf TMC
Model DDR-5

AN/FRR-74 TMC-DDR-5K

Similar to FRR-60 but with 4 ISB

spec sheet --
AN/FRR-85 frr85-01.jpg (34407 bytes) TMC DDRR-10 w/ remote tuning  spec sheet

manual download

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AN/URR-49 R-390 rcvrs and URA-8A RTTY converters
Guam 1968 - URR-49 configurations
HF shipboard/shore FSK dual-diversity system
  • two R-390A receivers
  • AN/URA-8A dual FSK converter
 info needed Nomenclature was assigned and this configuration was widely used both afloat and ashore, but I'm not sure it was ever procured as AN/URR-49
AN/URR-63 need to add photos TMC DDRR-10 w/ remote tuning  manual download -
AN/URR-64(V) AN/URR-64(V)1 dual diversity
(two receivers with two synthesizers)
urr64-tmc-01.jpg (475551 bytes)
AN/URR-64(V)2 single receiver

urr64-ne-01.jpg (1868542 bytes)

More URR-64 Photos

AN/URR-64(V)3 dual space diversity
(two receivers with one synthesizer
urr64-tmc-01.jpg (441377 bytes)
TMC model DDR-10
- photos thanks to www.tmchistory.org

manual download

Components
TN-512/URR tuner
TD-915/URR demultiplexer
O-1511/URR freq synthesizer

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RAE Pre-war triple-diversity HF unit using three RAB receivers  See RAB photos and info on WW2 Receiver Page - -
RBP
RBP-1
RCP
skaggs_1945_rbp-2.jpg (67934 bytes) skaggs_1945_rbp-3.jpg (74652 bytes) 1940's system

3-24 mc

RBP is dual triple-diversity system
(6 rcvrs)

RCP is single triple-diversity system
(3 rcvrs)

Manuf RCA

RBP & RCP Page - spec sheets, photos, and downloadable manual

RDM  (RCA DR-89)

 

Triple Diversity HF System using RCA AR-88 receivers
rdm-01.jpg (117416 bytes)
rdm-02.jpg (126783 bytes)

CRV-46246-A (RCA-AR-88F) as used in RDM
rdm-51.jpg (30785 bytes)

rdm-56.jpg (48220 bytes)

CRV-46246-B (RCA CR-88) as used in RDM-1
cr88a-navy.jpg (85693 bytes)

Manual NAVSHIPS 91061
Download 28.9 MB pdf

More info coming soon.

rdm-55.jpg (32085 bytes) rdm-52.jpg (31101 bytes) rdm-53.jpg (30620 bytes) rdm-54.jpg (21747 bytes)
CRV-46246-A (RCA-AR-88F) as used in RDM
rdm-1403-01.jpg (246808 bytes)
rdm-1403-02.jpg (248035 bytes) rdm-1403-03.jpg (155977 bytes) rdm-1403-04.jpg (216266 bytes)
rdm-1403-05.jpg (145687 bytes) rdm-1403-06.jpg (278781 bytes) rdm-1403-07.jpg (275509 bytes) rdm-1403-08.jpg (189967 bytes)
rdm-1403-09.jpg (146963 bytes) rdm-1403-10.jpg (136981 bytes) -- --