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I recall you done antenna R&D.

Yes, I did for a commercial firm that was biased toward research and specialized designs.

EH antennas, based on work and research are a great way to make the coax radiate.
The antenna is often near the lower limits and radiates poorly but the coax shield is often long
enough to be effective on 160.

Do they work, for some measure of "works" yes sorta.? Hint do not choke the shield.
A better statement is that better antennas are likely possible in the same volume.

Every time I see that I go back to first principles and examine the system.

Allison