Topband: Question on common mode chokes

[Robert Harmon]

Jim,

It will be interesting to see what others say but my take on this is that the tuner function is to provide an impedance match 
to the vertical and doesnt provide any choking.  You still should have the choke.

73,
Bob
K6UJ



> On Jun 3, 2015, at 9:42 AM, James Rodenkirch <rodenkirch_llc at msn.com> wrote:
> 
> I seem to recall, while reading up on common mode chokes, where I wouldn't need one if I employ an autotuner at the base of the antenna...is that true/factual?
> 
> I have an LDG Z11ProII autotuner right at the base of my vertical - I did add a common choke at the input to the autotuner (21' of my LMR-400 coax wound around a piece of 4.5" PVC for the low bands) but wonder if that is really necessary.  
> 
> 72, Jim Rodenkirch K9JWV
> 
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