Topband: Air Wound Coil

Richard (Rick) Karlquist richard at karlquist.com
Sat Sep 1 19:22:11 EDT 2018


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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