[Milsurplus] FW: SSR-202 and questions ( SX-28 interest )

[Hubert Miller]

Friends, Chuck McGregor, K7MCG, of Seattle WA, did the work of scanning the Hallicrafters SSR-202 manual for me. I asked some questions of him and I think his insights are astute and so interesting that I'd share them.
His comments follow:

" 1)On the lower right corner of the schematic are the numbers 010444, which I read as January 4, 1944. ( It could, of course be April 1st.)

2) That mess of strikeovers, misspellings and using a dirty typewriter sure don't look like the work of a professional secretary. The professional secretaries who I worked with took pride in the perfection of their product. Which leads to my conjecture that McLoughlin may have typed at least part of the manual, himself. I had some experience with engineering typing (my own) some 20 years later. Some of the pages are a bit better, and used a cleaner typewriter, so a pro may have typed them.

3) The main thrust of McLoughlin's work was selectable sideband reception of DSB-AM signals for avoidance of interference. The monitoring interest in AM voice signals may have been sensitive, if not classified. The magazine article from the March 1950 RTVnews suggests FCC, OSS, and Coast Guard interest. I suspect the interest may have been not only in propaganda broadcasts, but also in low power AM harbormaster, tugboat, and weathership transmissions which might have had intelligence value.

4) Apparently NSA took over radio intelligence collection from when it was organized, around 1952 (??), after several years of army-navy sparring. I don't know if they took over field facilities and operators, or just the mission. They seem to staff their operations with people from NSG, ASA and AFSS. These radios would have been only around 8 years old then, still pretty much state of the art,  and I guess they might  have remained in service until they were replaced by something better: SP600 or R390 receivers.   Just a wild guess: these radios would have been useful at any of the facilities where they later built elephant cage (Wullenweber) antennas. "
[A desk with a computer on a table  Description automatically generated]
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