Topband: how high are very high voltages on antennas?

[Grant Saviers]

I worked with Mike Kelley ( mpkelley at seco-systems.net)  (be aware 
there is another unrelated seco systems company).  We worked out the 
design of a dual coil (1/4" Cu tubing coils) center feed with about 12.5 
turns per side to tune the EF180C.  I used EZNEC to get the target uH 
needed.  The resulting coils have plenty of range to match the dipole 
for the full 80m band and more.   I replaced the linear loading with 
phillystran guys and mechanically strengthened it in addition using the 
Yagi-Mech (DXEng) analysis program.

As far as I know, Mike's company is unrelated to F12.

I haven't thought through how to use (number??) Tornado coils in a delta 
loop.  Two would exceed the cost of the SteppIR 40m vertical.

Grant KZ1W


On 11/22/2012 11:45 AM, Richard (Rick) Karlquist wrote:
>
>
> On 11/22/2012 9:13 AM, Grant Saviers wrote:
>
>> with the antenna.  An MFJ screwdriver controller provides 10 preset
>> turns counts, established at 20KHz steps by manually measuring swr.  I
>> use the MFJ controller on my Tornado variable inductor tuned 80m
>> rotatable dipole (rebuilt EF-180C) for full band coverage and it has
>> been solid.
>
> Why not use another Tornado to tune your 160m loop?
> Does Force 12 sell the Tornado as a separate item?
>
>
> Rick N6RK
>