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I think you'll need about another 1/8wl in the bottom phasing coil. I have an old one-piece SigmaII for 2m made from stainless steel and having measured the single-turn phase matching coil on the bottom it appears the entire antenna including match is 3/4wl total.

Shunt feed it so you bleed off the high voltage which will occur on an antenna of that size.

I like your idea and am brain farting how I might erect one like it here, though I might opt for more antenna in the horizontal for better NVIS since I mostly talk to stations within 1000 miles.

Interesting curves, Bob. Which of the three bottom curves best represent the current nodes?

Good to see you back, Toll_Free. Is yours modded, and if so, do you have measurements including the Gamma, and for what center frequency?

73zzz

[QUOTE="CDX-007, post: 178462, member: 1254"] I think you'll need about another 1/8wl in the bottom phasing coil. I have an old one-piece SigmaII for 2m made from stainless steel and having measured the single-turn phase matching coil on the bottom it appears the entire antenna including match is 3/4wl total. Shunt feed it so you bleed off the high voltage which will occur on an antenna of that size. I like your idea and am brain farting how I might erect one like it here, though I might opt for more antenna in the horizontal for better NVIS since I mostly talk to stations within 1000 miles. Interesting curves, Bob. Which of the three bottom curves best represent the current nodes? Good to see you back, Toll_Free. Is yours modded, and if so, do you have measurements including the Gamma, and for what center frequency? 73zzz [/QUOTE]

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