[ARC5] [Milsurplus] SCR-287 (BC-375 & BC-348) WW II Operational Question

[Hubert Miller]

Your post is interesting but doesn't address my question. I imagine the RF route for osc to antenna in the CMS is via grid-plate capacitance in the 6L6 final
and thence to the output circuit. With the LM or BC-221 as transmitter, as Bill related, i tend to think this would only work with a high Z antenna, like 1/2 wave. 

I also have the CMS, never used it tho. The black plastic sheet for covering the key, to keep hands off, got the sticky disease, so i discarded it. I am thinking
i will plug in 1 volt receive tubes in the xmtr; maybe improve the stability that way. 
I wonder how the regen works with no actual gain control. That circuit design is very old. 
I suspect the CMS was intended for Philippines. It is a U.S. Navy radio. The Navy also owned the MBM, which seems not to have been the insurgents' answer
to prayer either. I further suspect the CMS was just too hobbyist - like for a radio issued to people with only a basic operator level training. My speculations
only. The CMS did stay in the Navy catalog for some years after the war, apparently; witness that AC supply for it, which is clearly of a newer generation of 
electronics. 
-Hue Miller