On Feb 18, 12:53?pm, Cecil Moore wrote:
wrote:
Not only that, but his EM wave generator was equipped with a high-gain
directive antenna system. And he was equipped with a sophisticated
diversity receiving system for those frequencies, too.

If an incandescent bulb, too bad most of his power
was radiated in the invisible IR range. :-)

Very true!

However, if the flashlight was one of the new
LED models, its DC-power-to-usable-EM-output)
conversion efficiency could be very good.

The transmitting efficiency
(DC-power-to-usable-EM-output)
of the typical VHF FM voice radio is typically
no better than about 50%.

73 de Jim, N2EY