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Re: Topband: Air Wound Coil

To: Grant Saviers <grants2@pacbell.net>, W7RH <midnight18@cox.net>, Topband <topband@contesting.com>
Subject: Re: Topband: Air Wound Coil
From: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Sat, 1 Sep 2018 16:22:11 -0700
List-post: <mailto:topband@contesting.com>
On 9/1/2018 3:42 PM, Grant Saviers wrote:
Me too.

Or the inverse as I did, cut my T for the low end of the band. Then three series capacitors with PCB relays to short each individually (none, 1, 2, or 3) yielded nearly full band coverage <1.5:1 swr.  My T is 85' to top and a 50:25 ohm TLT is a close match, then the capacitor stack follows.  Caps and relays fit in a weather tight plastic box about 3x5x8".  Of course the resonance resistance and capacitor values depend

I did exactly this for an 80/75 meter dipole.  Worked perfectly.
I am planning to do this same thing for my 160 meter vertical
when I get around to it.

Rick N6RK
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