Well, the ARC-1 dates to 1943 or maybe later, doesn’t it ?
I recall now reading in “Men and Volts at War” by General Electric Co. that Japan had captured some ARC-1 but had no way to copy its complexity.
This is no doubt true; in those years, who else could build an autotune mechanism like that ? But you have to wonder about the absolute veracity
of some of such anecdotes.
Was there not some conversion article that changed output to 6 or maybe even 10 meters ?
-Hue Miller