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I just re-read this and noticed the 3.9 MHz target.

that is doable
32 feet of wire then 44 uH coil, then 32 feet wire should be about 3.6 MHz
31 1/2 feet of wire then 42 uH coil then 31 1/2 feet should be about 3.8 MHz

so, 31 feet even should be about 3.9 MHz +/- YMMV

the coil should be 20 turns 14 ga wire on a 4 1/2 od pvc tube for 44 uH
.... if ya really wanna be picky, make it 19 turns,... about 40 uH

that 62 foot overall should fit nicely in the 60 foot dimension with a little sag.

[QUOTE="Road Squawker, post: 563546, member: 17089"] I just re-read this and noticed the [B]3.9 MHz target[/B]. that is doable 32 feet of wire then 44 uH coil, then 32 feet wire should be about 3.6 MHz 31 1/2 feet of wire then 42 uH coil then 31 1/2 feet should be about 3.8 MHz so, 31 feet even should be about 3.9 MHz +/- YMMV the coil should be 20 turns 14 ga wire on a 4 1/2 od pvc tube for 44 uH .... if ya really wanna be picky, make it 19 turns,... about 40 uH that 62 foot overall should fit nicely in the 60 foot dimension with a little sag. [/QUOTE]

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