Maybe I will beat W6DGH to this... WB6ZKK was pushing barb wire dipoles.
On Tue, Sep 14, 2021 at 3:37 PM Mark - N5OT <[email protected]> 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, [email protected] 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. > >>> > >>> > >>> _________________ > >>> Searchable Archives: http://www.contesting.com/_topband - Topband > >>> Reflector > >> > >> _________________ > >> Searchable Archives: http://www.contesting.com/_topband - Topband > >> Reflector > > _________________ > > Searchable Archives: http://www.contesting.com/_topband - Topband > > Reflector > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
