[ARC5] US Submarine ELINT WWII, (was British ZB......?)

[D C _Mac_ Macdonald]

Way back in 1964 or 1965 I bought an APS-13
(probably from Fair Radio) for about $5 as a way
to start my first "junk box."  I got tubes, sockets,
connectors, resistors, etc.  Quite a bit of that stuff
actually ended up in projects.

73 - Mac, K2GKK/5
Since 30 Nov 1953
Oklahoma City, OK
USAF (Retired) 61-81
FAA (Retired) 94-10


________________________________
From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> on behalf of Gene Smar via ARC5 <arc5 at mailman.qth.net>
Sent: Wednesday, April 7, 2021 18:30
To: 'ARC-5 List' <arc5 at mailman.qth.net>
Subject: Re: [ARC5] US Submarine ELINT WWII, (was British ZB......?)


Speaking of Japan and RADARs, I’ve always thought it ironic that the APS-13 “Archie” tail warning RADAR was mated with the Yagi-Uda antenna as part of the altimeter fuze for both Little Boy and Fat Man.



C’est la guerre.





73 de

Gene Smar  AD3F



From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On Behalf Of Tim
Sent: Wednesday, April 07, 2021 6:12 PM
To: Hubert Miller <Kargo_cult at msn.com>
Cc: To: ARC-5 <arc5 at mailman.qth.net>
Subject: [ARC5] US Submarine ELINT WWII, (was British ZB......?)



Hue said: But by US standards Japanese radars were rudimentary, not widely deployed, and also ( without referring to my docs ) I believe mostly operated on lower frequency bands than US. It just seems rather less likely or certainly, uncommon

[snip]

--------------------------------

Generally true.....US Subs used the AN/APR-1 (and -4 presumably) hunting IJN ships/submarines in the Pacific in WWII.  ..In researching the AN/APR-1 that I am playing with I learned that the USS Batfish sank an IJN submarine after the APR-1 detected its 150 mc radar. Those IJN subs also carried 3 Gc radars, at least late-war.  The APR-1 (SPR-1) could detect both radar band emissions. I would expect many other intercepts were made with this gear.  It was a good passive system and the APR-4 variant was used well into the Vietnam war era aboard EB-66 aircraft, probably others.

Some details if you're bored:  http://www.n6cc.com/an-apr-1-apr-4-radar-comm-surveillance-receiver/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.n6cc.com%2Fan-apr-1-apr-4-radar-comm-surveillance-receiver%2F&data=04%7C01%7C%7C4b4fed3bd7cc4fc7920308d8fa1d29d3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637534350442030692%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=iI0xIOmyJ0pUZSAcL7PKTEhPEakarauAw96OCsAD1BA%3D&reserved=0>



Tim

N6CC


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