[TowerTalk] Re: TowerTalk Digest, Vol 26, Issue 39

[Bill Powell]

Using a SteppIR as an "adjustable" top-hat in an interesting thought.

I suggest posting the question to the SteppIR group:
	http://groups.yahoo.com/group/SteppIR/

Bill Powell - WB1GOT

>Date: Wed, 9 Feb 2005 17:13:51 -0500
>From: "Jerry Keller - K3BZ" <k3bz at arrl.net>
>Subject: [TowerTalk] Fw: Topband: Top Loading of Shunt-fed Tower
>To: "(Reflector) TowerTalk" <towertalk at contesting.com>
>Message-ID: <023801c50ef4$a301a410$6400a8c0 at homebrew1>
>Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>	reply-type=original
>
>Good question.  I sure don't know the answer.... maybe one of our resident gurus might venture one. 
>Without pulling the antenna downj to take a look, I'm not even sure how close the boom gets to the 
>motor circuits.
>
>73,  Jerry K3BZ
>
>----- Original Message ----- 
>From: "N2TK, Tony" <tony.kaz at verizon.net>
>To: "'Jerry Keller - K3BZ'" <k3bz at arrl.net>
>Sent: Wednesday, February 09, 2005 4:30 PM
>Subject: RE: Topband: Top Loading of Shunt-fed Tower
>
>
>> Hi Jerry,
>> I assume the StepIR uses an aluminum boom. I wonder if there is there any
>> chance of arc-over from the boom to the motor circuits with high voltage
>> induced at the top of the tower/boom when loading on 160M?
>> N2TK, Tony
>>
>>
>>
>> -----Original Message-----
>> From: topband-bounces at contesting.com
>> [mailto:topband-bounces at contesting.com]On Behalf Of Jerry Keller - K3BZ
>> Sent: Wednesday, February 09, 2005 3:11 PM
>> To: Topband Reflector
>> Subject: Topband: Top Loading of Shunt-fed Tower
>>
>> I'm considering shunt feeding of a 45 foot freestanding tower with a 3L
>> SteppIR on top for 160 and
>> 80. The SteppIR is NOT electrically connected; the tower IS grounded,,, each
>> leg has a 32 feet of #4
>> solid copper with ground rods at 16 and 32 feet.  The possibility of using
>> the SteppIR as a tunable
>> cap is interesting... has anyone tried this?  If so, have you run full power
>> thru it?  Did you use a
>> relay to connect the SteppIR?
>> 73,  Jerry K3BZ
>>