Topband: NE7D loaded tower

Bruce Whitney via Topband topband at contesting.com
Thu Jan 29 17:06:32 EST 2015


Here is another data point.
SteppIR Monster at the top of a 130ft shunt fed tower full legal limit power from an Acom 2000 on 160m with no problems since 2008. Be sure elements are fully retracted for consistent loading. 

Sent from my iPhone

On Jan 29, 2015, at 4:24 PM, Tom W8JI <w8ji at w8ji.com> wrote:

>> I can't speak  with knowledge on stepper antennas. BUT I can regarding  a Hi Gain discovery III
>> I shunt feed my 105 ft. Rohn 25   with only the 3 element 40 meter beam as the top loading.
>> 
>> More then once I burned a loading  wire.... over the years I had that configuration.
>> 
>> SO from that experience a complex antenna  like SteppIR design   I would be VARY Leary !
> 
> I strongly agree with Wayne, here.
> 
> I think shunt feeding a tower with an unmodified SteppIR is like playing Russian roulette with the element motors and feeds.
> 
> 73 Tom 
> _________________
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