|[AMRadio] WW II Army Field Sets|
Kim.Elmore at noaa.gov
Fri Jul 9 23:40:51 EDT 2004
Thanks a *bunch*!
Given the st-up I've created, the SCR-188 would work FB :) So, do you (or
anyone else) know what would be involved in tweaking the BC-191/BC-312 (or
the JT-350A) combination to work on 20 m? Is this something a guy back
then, with a bit of time, could do, or does the BC-191 design simply
preclude such a conversion? I ask because the BC-191 has a plethora of
"tuning units," about whose function I'm not entirely certain. I'm
guessing these were exciters. If so, could one of these have been re-tuned
to cover 20 m and, if *that* could be done, would the PA be able to tune 20
m? And I'm completely clueless about the BC-312 receiver, but I thought I
saw (somewhere) that it could tune up to 18 MHz, which would do the trick
At least these things could also do AM!
Kim Elmore, N5OP
At 07:48 PM 7/9/2004, you wrote:
>To add to all the information you've received...
>The HF equipment that comes closest to your requirement of "a portable set
>that can be carried in
>the back of jeep and lifted by a couple of guys," would be the SCR-284.
>This was a compact (for the time) unit with the transmitter and receiver
>cabinet. Could be mounted in a jeep and run off a dynamotor fed in turn
>6 or 12 vdc from the vehicle. Or, set up in the weeds and run off of a hand
>cranked generator. Widely used in all theaters. Low powered, though (5
>watts phone, 20 watts CW), and only covered 3.8 to 5.8 mHz. The BC-1306
>(mentioned by someone else) and the GRC-9 radios were successors, the
>arriving just at the end of the conflict.
>The various BC-312/BC-191 combinations (SCR-177, 188, 193, etc.) covered a
>wider frequency range but were much bigger and heavier. To get 160
>coverage would have required the BC-610 based SCR-299, 399 and/or 499 systems
>for which one would need a truck (or a small room in the case of the 499).
>There were some other sets that come kinda close to your requirement. The
>JT-350A covered 1.5 - 12 mHz and put out 75 watts. This was a commercial
>the Air Corps went around the Signal corps to bootleg into service. Nice
>rig but hard to find. There were also the SCR-506 and SCR-281, both
>frequency coverage and somewhat unwieldy.
>Dennis D. W7QHO
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>AMRadio at mailman.qth.net
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