Re: Topband: Choke Construction Info Needed

["Tom W8JI" <w8ji@w8ji.com>]

70 turns 2" diameter over 4" length would be 100 uH, and with an air core 
and #16 magnet wire would have a Q of about 200 or so. That's 1000 ohms 
impedance, a few hundred thousand ohms parallel resistance, and the 
dissipation would be less than 1 watt at 1500.

Or 38 turns over 4 inches on a 4 inch form. You could use #12 wire Teflon 
insulated, and have a Q of maybe 300 or so. Again less than 1 watt heat out 
of 1500.

Personally, I'd use #12 or 14 Teflon on some old PVC pipe.

73 Tom





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UR RST IS ... ... ..9 QSB QSB - hw? BK