[Milsurplus] CMS time again

[Bruce MacMillan]

currently trolling through more of the CIA files I found this reference 
in an OSS file from September 1944:

"Our SI field staffs along the Yangtze have struggled to maintain 
themselves, and radio contact has been kept up by B-100 sets for a 
distance of 250 miles"

Obviously supplied to the OSS. Is anyone familiar with this set?
source: 
https://www.cia.gov/library/readingroom/docs/CIA-RDP13X00001R000100140011-7.pdf

Bruce
M0SOE

On 03/05/2020 08:53, Hubert Miller wrote:
> I was reading a couple weeks back, I think it was some kind of original text, not an aftermarket second - source report, and it mentioned the
> "OSS radio" in CBI as being a HB, 3 tube regen and 2x 6v6 transmitter. ( I had previously posted here some information about this radio. )
> When I read that, I thought, by george, that sounds just like the Navy CMS, including the electrical crudity ! However, the CMS is more
> mechanically complicated, particularly in the receiver dial, where the OSS radio used something that looks like the Kurz - Kasch vernier dial
> from the early 1930s, and the OSS had a single chassis, while the CMS is two units. We do know, the CBI was an Army and OSS game, not
> Navy. Who copied whom ? I dunno. I tend to think the OSS gang didn't know anything about the Navy CMS, but they knew what wouldn't
> work in the jungle and they knew what they needed. Did the CMS copy their idea? Who knows, now. The CMS would seem to have also
> this advantage: you can plug in any number of different triode or pentode tubes, 1.5 or 6 volt types, in the transmitter with no circuit
> change required.
> Probably because of their very low numbers, and rather homebrew construction values, no "OSS radio"  seems to have survived. Still, I can
> imagine that the crude simplicity of the CMS circuits mimics what I imagine the OSS radio circuit to be. CBI was OSS; China and Philippines
> was Navy turf, at least until the Army started seriously thinking about an invasion of the Philippines, and started landing a bunch of observer
> teams of their own, equipped with BC-1306 radios.
>
>
> -Hue Miller K7HUE
> ______________________________________________________________
>


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