HF Diversity Receiver Systems |
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| model | type | primary use | freq | features |
| AN/FRR-3 AN/FRR-3A |
Dual Diversity 2.4-23 mc HF Shore FSK Remote dial-up to select 5 fixed frequencies and 4 antenna combinations |
manuf Press Wireless
TM 11-872 |
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| AN/FRR-10 | Dual Diversity HF shore SSB (simultaneous USB & LSB) variant of FRR-24 |
2-32 mc | dual diversity
253 tubes Manuf National |
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| AN/FRR-24 | Triple Diversity HF shore RTTY & CW |
2-32 mc | triple diversity
420 tubes Manuf National |
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| AN/FRR-28 | ![]() 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 |
R-450/FRR-28 showing AVC switch and ID tags |
0.54-54 mc Dual Diversity - HF shore used with AN/URA-8A RTTY converter |
uses two Hammarlund SP-600-MX (R-450/FRR-28) manuf - FRR-28 spec sheet - page 1 FRR-28 spec sheet - page 2 Manual - NAVSHIPS 91582 |
| AN/FRR-32 | Dual Diversity -
HF shore system 2-32mc two R-618/FRR-32 rcvrs |
Manuf RCA NAVSHIPS 92736 |
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| AN/FRR-37 | Dual Diversity version of FRR-24 HF shore RTTY & CW |
2-32 mc | dual diversity approx 250 tubes Manuf National |
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| AN/FRR-38 | Dual Diversity FSK two R-390(*) receivers CV-116/URR dual FSK converter |
0.5-32 mc | Signal Corps procurement but used by USN
Manuf Collins & Hoffman
TM-11-647 |
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| AN/FRR-41 | Dual diversity SSB two R-390(*) receivers two CV-157 SSB converters (simultaneous USB & LSB from each) |
0.5-32 mc | Signal Corps procurement but used by USN
Manuf Collins & others
TM 11-649 |
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| 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
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need info | need info - please send e-mail |
| AN/FRR-60 | ![]() photo from TMC vintage radio web site |
HF shore diversity system
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info needed | Info - AN/FRR-60
Page
Manuf TMC |
| AN/FRR-64 | need photos | TMC DDR-10 | - | - |
| AN/URR-49 | ![]() Guam 1968 - URR-49 configurations |
HF shipboard/shore FSK dual-diversity system
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info needed | Nomenclature was assigned and configuration was widely used, but I'm not sure it was ever procured as URR-49 |
| RAE | Pre-war triple-diversity HF unit using three RAB receivers | See RAB photos and info on WW2 Receiver Page | - | - |
| RBP RBP-1 RCP |
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1940's system
3-24 mc RBP is dual triple-diversity system RCP is single triple-diversity system |
Manuf RCA
RBP & RCP Page - spec sheets, photos, and downloadable manual |
RDM (RCA DR-89)
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Triple Diversity HF System using RCA AR-88 receivers![]() |
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CRV-46246-B (RCA CR-88) as used in RDM-1 Manual NAVSHIPS 91061 More info coming soon. |
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