"Reg Edwards" wrote in message
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A choke made of 8 turns, 6 inches diameter, has a resonant frequency
around 21 MHz and has an impedance greater than 1000 ohms in the 20
meter and 10 meter bands.

Thanks Reg. I'm wondering now what 12 turns would work out to??

Chokes are best wound neatly in the form of a single layer solenoid.
Jumble wound choke coils can have funny effects.

Mine is a single layer with lots of electrical tape keeping the turns close
and pretty much all the same.

For design of chokes made with coax cable download program SELFRESS
from website below and run immediately.
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Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
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Thanks again, and 73 - AK