[TowerTalk] Auto tuners, Baluns and open wire feeders

[Kim Elmore]

Yes, this includes mechanical issues if there's no center support. Then 
there's the entire issue of insuring there's no wire tension supported 
by the tuner itself. But except for that...

Kim N5OP


On 7/17/2018 4:56 PM, Wes Stewart wrote:
> Think about that for a minute.  The tuner weighs something and 
> requires DC power,  Do you want to suspend a few pounds of weight + 
> wind load + coax + power cable + balun(s) at the center of a 
> horizontal wire?
>
> Wes  N7WS
>
>
> On 7/17/2018 2:34 PM, Kim Elmore wrote:
>> I’ll display my benighted state by asking a question: why not place 
>> an auto-tuner at the feed point of the doublet? That way, the feed 
>> line is flat and the doublet can be any length, assuming impedance 
>> say desired frequencies are in tang of the tuner. Then, add common 
>> mode chokes at the  auto-tuner input and anywhere else desired. Won’t 
>> that do the job?
>>
>> Kim N5OP
>
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-- 

Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP 
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"In theory there is no difference between theory and practice. But, in 
practice, there is." //– Attributed to many people; it’s so true that it 
doesn’t matter who said it./