[Milsurplus] SRR-13 question

[Nick England]

Here's the major Navy receiver development timeline as I understand it -
installations varied all over the place of course with RBB's still found on
some ships into the 1970's. The Navy's primary emphasis post-war was on RTTY
message handling, first with 850cps shift single channel, then later 8-16
channel tone packs with 85cps shift, requiring high stability (spec for
WRR-2, FRR-60, etc. was 0.1 cps at 10 mc).
Nick
www.navy-radio.com

SHIPBOARD RECEIVERS
-------------------
pre-WW2 - RCA develops RBA, RBB, RBC - octal tubes

Late 1940's - RCA develops AN/SRR-11,-12,-13 series. Subminiature tubes,
modular construction, conventional dual-conversion design with LC HF
oscillator. Widely used for single channel RTTY as well as CW.

Mid 1950's - Collins develops R-390()/URR for Signal Corps. Adopted by USN.
Crystal-controlled HF Oscillator and PTO give high stability for CW, SSB,
and RTTY - but not really stable enough for multi-channel RTTY?

Late 1950's - National develops AN/WRR-2 frequency synthesized dual-Wadley
Loop receiver. Highly stable for ISB and multi-channel RTTY

Mid 1960's - General Dynamics develops R-1051/URR synthesized transistorized
receiver - primarily for multi-channel RTTY

SHORE STATION RECEIVERS (mainly diversity setups)
------------------------------------------------
pre-WW2 - RCA develops RBP, RCP. Western Electric develops ???

Late 1940's - National develops triple diversity AN/FRR-24 for FSK. LC-based
HF oscillator with high mechanical stability.

Early 1950's - Northern Radio develops dual diversity AN/FRR-28 based on
Hammarlund SP-600 for FSK. Conventional dual conversion with add-on
oven-stabilized LC-based HF oscillator

Mid 1950's - Collins develops R-390() - dual diversity FSK with AN/URA-8A
converter. SSB with CV-591A or CV-157 converter. xtal HF osc + PTO.

Late 1950's - National develops AN/FRR-59 (same as WRR-2) for SSB
multi-channel RTTY. synthesized high-stability design

Early 1960's - TMC develops AN/FRR-60 synthesized diversity system for
multi-channel RTTY.

Mid 1960's - General Dynamics develops R-1051 - overlaps with AN/FRR-60. 

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Ray Fantini
Sent: Friday, November 20, 2009 9:01 AM
To: milsurplus at mailman.qth.net
Subject: [Milsurplus] SRR-13 question

Wonder if the AN/FRR-21 and SRR-11 drifted as bad as the HF version the
SRR-13, and what was the point of the SRR-13? Was it supposed to replace the
R-390 for shipboard operation? Or was it used between the old WW2 series
RA/RB and the like stuff and later replaced by the R-390 and being that the
R-390 was built as a ground base Army radio was the navy so annoyed at this
that went to something like the SRR family of radios? And last but not least
what was the line of radios deployed for HF operation? Was it SRR to R-390
to R-1051? Or R-390 to SRR to 1051?
Ray Fantini KA3EKH