All
Check out the URL below on some actual measurements of coiled versus
ferrite chokes. Unfortunately the data at the time was aimed towards beam
applications and the data only covers coils up though 8 turns. But I think
it gives insight into what is possible. The data goes down to 1 MHz however
and is at least insightful
http://www.berkshire.net/~robbins/technote/airbalun.html
Dave
NR1DX
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