On Jan 23, 5:05*pm, "Dave" wrote:
"Richard Harrison" wrote in message

...

Art wrote:
"David just for the record, skin depth is proportional to
frequency----."

Not exactly. Skin depth is inversely proportional to the square root of
the frequency.

For example at 1 Hz the skin depth is about 2.6 in. in copper. At 10 Hz..
it is about 0.826 in. and at 100 Hz the depth is about 0.260 in. and at
1000 Hz the depth is 0.0826 in. etc.

Best regards, Richard Harrison, KB5WZI

don't confuse him with the facts!

My facts were correct as stated. Richard stated the "exact"
proportions
which is really nit picking. Physics books say it is "proportional"
which states that it is frequency change what affects skin depth. It
is stated exactly that way in the book
that Richard has just obtained and quoted
Art