Maybe I will beat W6DGH to this...
WB6ZKK was pushing barb wire dipoles.
On Tue, Sep 14, 2021 at 3:37 PM Mark - N5OT <r-emails@n5ot.com
<mailto:r-emails@n5ot.com>> wrote:
When I was a kid, we had a guy WB6ZKK who touted dipoles made of
slinkys. I am thinking some of the same electronic theory and
design
must have come into play.
Tree will remember. Long live the old NTS.
73 - Mark N5OT
On 9/14/2021 5:21 PM, Grant Saviers wrote:
> I've not heard the term "accordian" applied, but the Tornado
Tuner
> expands and compresses a coil inside some pvc pipe to change L
about
> 2:1. I have one (split) to tune the full 80m band at the center
of an
> 86ft rotatable dipole. Your choice of Al or Cu coil tubing
with a
> small Portescap gearhead motor driving a delrin (I think)
leadscrew
> screw and reed switch for turns counting.
>
> JKantennas makes an yagi with a Tornado. Rumor has it a 3L
80m was
> built with them for full band coverage.
>
> Originally, mostly used for tuning/loading verticals. No sliding
> contacts makes it quiet and reliable. I used an MFJ screwdriver
> control with 10 pushbutton 50KHz spaced presets for 80m but now
have a
> RT21dc automatically tracking frequency to preset coil positions.
> GHeverywhere does the mapping.
>
> Grant KZ1W
>
> On 9/14/2021 12:54, Mark - N5OT wrote:
>> Wait. There's such a thing as an "accodion inductor"? I
thought I
>> knew everything.
>>
>> I'll be glad when mowing season is over, too.
>>
>> 73 - Mark N5OT
>>
>>
>> On 9/14/2021 2:44 PM, W3HKK@roadrunner.com
<mailto:W3HKK@roadrunner.com> wrote:
>>> Been reading the encouraging posts. So, I got up and heard good
>>> activity, working:
>>> VK3HJ - ZL1AZ - VK2WR at Ohio SR and up to 20 minutes after,
when the
>>> band faded out.
>>>
>>> Gud to hear Luke, Dennis and Adrian coming through so well,
through
>>> moderate QRN. Unusually warm temps here for mid Sep. ( 85-88F)
I took
>>> an hour last week to tweak the 52' tall 1/4 wave INV-L. All 26
radials
>>> are still coiled up and hanging from the walnut tree, until
lawn
>>> mowing season ends in mid Oct. Then I will uncurl them and
retune
>>> accordion inductor.
>>>
>>> Heard AA1K this morning as well.
>>>
>>>
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