Thanks, that's interesting. I also was interested to note the freq range,
from about 1 to 12 MHz.

Christopher A. Young
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"Jim Wilkins" wrote in message
...


The bomber radios were difficult to tune to another frequency.
http://www.qsl.net/ve2gce/index.html

This suggests that fighter radios were pre-tuned on the ground and the
pilot could only switch between two preset frequencies.
http://en.wikipedia.org/wiki/AN/ARC-5
"The two transmitters would be fixed-tuned before take-off, with the
pilot able to select the desired transmitter and control the mode
(Voice, MCW, CW) at the transmitter control box."
and
"Such receivers were not remotely tuned by the pilot, but were instead
lock-tuned to the associated transmitter's frequency before take-off."

jsw