Topband: TopBand DownUnder

[W0MU Mike Fatchett]

I have a drawer full of slinky's the steel version.  I recall that 
someone was making slinky beverages for people that could not stretch 
out 300 plus beverages.  I never got around to making one.  Maybe the 
slinky's are collector items now and I can get my money back!  HI!

W0MU

On 9/14/2021 5:08 PM, Grant Saviers wrote:
> A bad idea when the Slinky is steel.  Helical wound copper wire 
> antennas do work, for TB we used a wound vertical on a FG pole at H40TT.
>
> It was amazing to me that EZNEC will auto generate a helix wire of 
> arbitrary dimensions, pitch, and segmentation.
>
> Grant KZ1W
>
> On 9/14/2021 15:45, Mark - N5OT wrote:
>> Okay then, who was making dipoles out of slinkys?  Barbed wire is not 
>> germane to a discussion of either accordion inductors or Tornado Tuners.
>>
>> Back on topic, I re-read K9YC's presentation about 160 meter 
>> transmitting antennas, and it was good to be reminded of so many 
>> things.  A fun fact is, I had no idea I live on the most conductive 
>> ground on the map of the USA.  That explains many things.  Lucky me!
>>
>> 73 - Mark N5OT
>>
>> On 9/14/2021 5:39 PM, Tree wrote:
>>> 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 at n5ot.com 
>>> <mailto:r-emails at 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 at roadrunner.com
>>>     <mailto:W3HKK at 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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