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Hello
Dick
I've noted the great difference between the values reported by Mesny and those
appearing in the graph you have sent. I think the difference may be explained as
follows: the graph refers to two wires, where the magnetic field is rarefied
only in the sides facing each other. In the case of a single layer coil, except
the first and the last turn, the magnetic field is rarefied in both sides of
each wire, so reducing further on the useful area and consequently increasing
the RF resistance. Any comment welcome 73 Cesare
Dr. OM,
Perhaps this has been reported
bnefore but just in case it has not. Terman's RADIO ENGINEERS'
HANDBOOK (first Edition, Sixth Impression) contains useful information
on the proximity effect and the ratio of ac to dc resistance of isolated
litz wire: pages 36 and 37.
Attached a sample that hopefully passes the
reflector.
73, Dick, PA0SE
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