From Dave G3YMC
Clearly the use of large transmitting loops is outside the terms of the lowfer
licence in the US. However use of a receive type loop with many turns of
wire (litz or not) for transmitting is not the way to go. To get a signal in
requires a large single (or at most two) turn loop with thick wire. I have
technique to some success on 136 as many of you will know, and my website
experiences. The aim is the same as with any transmit antenna - to get the
losses as low as possible related to the radiation resistance. For this I use
speaker cable and the resistance of my 33m circumference single turn loop is
ohms. Loop current has been measured as 8A at 35W, they are not high impedance
devices! And matching to the feeder must be at the feedpoint to eliminate
losses in the feeder which will be very significant.
See my site for more details.
73s Dave G3YMC