[TowerTalk] 80 Meter yagi question

[Richard Thorne]

Hi Bob,

Yes the tornado tuner is a dual motorized coil.  It works just like a 
mobile coil antenna.

Rich - N5ZC

On 10/8/2017 8:25 PM, Bob K6UJ wrote:
> Rich,
> I looked at the stack on QRZ.com.   Great station Rich !I can't make out the JK801 in the picture.
> The specs on JK site show the T-hats, very nice !   Anda loading coil (motorized ?)
>   BobK6UJ
>
>
>        From: Richard Thorne <rthorne at rthorne.net>
>   To: towertalk at contesting.com
>   Sent: Sunday, October 8, 2017 4:58 PM
>   Subject: Re: [TowerTalk] 80 Meter yagi question
>     
> I can recommend the 80m JK801 rotatable dipole.
>
> I have one at 138' and so far so good.  It's only been up since July so
> I'm looking forward to the fall/winter DX season.  The antenna does not
> use coils, it uses T-hats towards the ends.  There isn't much droop to
> it(note there is no truss cable) and it has handled the winds here in
> Amarillo nicely.
>
> There's a picture of my JK stack on my qrz page.  The dipole is at the
> top followed by a Mid-Tri Tribander, JK3040SR 40/30 yagi, another
> Mid-Tri and finally a F12 WARC 2/2 at about 55' to cover 12/17.  I'll
> probably add another Mid-Tri when 10 meters is more active.
>
> The only interaction I've had is on 20m, I had to move the JK801
> parallel with the other booms to fix the 20m swr issue.  At the time of
> installation the tornado tuner was not active.  I'm going to climb the
> tower and have a buddy monitor the 20m swr while I move the JK801
> parallel with the elements.
>
> Each half of the JK801 is 27' long and with the T-Hat it probably acts
> as a half wave on 20m.  I'm hoping with the tornado tuner on line,  that
> the 20m portion of the upper Mid-Tri won't be affected. I'd like to get
> this resolved from an SO2R stand point.  More than likely propagation
> will be coming from the same direction on both 40 and 80 which requires
> both antennas to be pointed in the same direction vs a 90 degree offset.
>
> I've worked lots of DX on FT8 with it along with some phone and cw.
>
> I can cover the entire 80m band from below 3.5 mhz to above 4.0 mhz via
> the tornado tuner and the mfj-1924 controller.
>
> I have the following swr bandwidth as follows:
>       - 1.5:1 40 khz
>       - 1.75:1 60 khz
>       - 2.0:1  80 khz
>
> I use 5 of the MFJ memories to cover cw and 5 for SSB then fine tune if
> needed with the up and down buttons.  I may change that to 4 on CW and 6
> on SSB.
>
> Rich - N5ZC
>
> On 10/8/2017 6:32 PM, Bob K6UJ wrote:
>> Hi John,I'm assuming you want a loaded shortened dipole.
>> I would suggest contacting JK Antennas and ask Ken to fab two of his loading coilsfor a shortened 80M rotary dipole.  His loading coils are outstanding.  Made with solid
>> aluminum rod, not tubing, and the connector blocks on the end of the coils are welded on.Less connection worries.  Take a look on his website at how he makes these loading
>> coils, very impressive.   For that matter ask him about a complete 80M rotatable
>> dipole if you aren't making one yourself.
>> I wish my tower would handle an 80M dipole along with the existing load or I would
>> be thinking of doing an 80M dipole too.I have a 4EL 20M yagi at 108 ft  and a 3EL 40M yagi at 96 ft.  That will be my upperband antennas during the low sunspot cycle years.   I have an 80/160 dual band
>> inverted L to cover these bands.
>>
>> BobK6UJ
>>
>>          From: john nistico <electric911inc at hotmail.com>
>>    To: towertalk <towertalk at contesting.com>
>>    Sent: Sunday, October 8, 2017 12:19 PM
>>    Subject: [TowerTalk] 80 Meter yagi question
>>      
>> So my Virginia towers are almost completed and most of the antennas are ready to install. I am thinking of adding a rotatable 80 meter yagi on one tower. Any suggestions?
>>
>>
>> John J. Nistico
>> 911 Electric Inc.
>> 516.325-8993
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk at contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>>
>>      
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk at contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>     
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk