[Elecraft] K4 Experience

[steve WB3LGC]

I'll ask a similar question...

I use a horizontal 80m loop fed with ladderline.  I have a 1:1 choke at 
the ladderline to coax connection with 10 feet to the tuner.  My noise 
is a lot less than it was long ago...  The noise may be gone, or the 
balun helps, or it was a different antenna.  Should I change anything?

The real Q...  Portable I use a 135' dipole with ladderline and a choke 
at the tuner.  Would I be better off using coax and a choke to feed the 
antenna??  I do like the multi band capability of the ladderline (450 
ohm) center fed "zepp".

my choke is (2) FT240-31's with 12 turns RG-8x.

73, steve WB3LGC

On 7/6/21 12:33 AM, Robert G Strickland via Elecraft wrote:
> Does the choke cause a significant sag in the antenna? For 40m maybe 
> not; my 80m dipole with a choke looks like a V antenna, and I'm 
> reluctant to increase the tension in the support ropes to the point 
> where the the antenna starts to flatten out.
> ...robert
>
> On 6 Jul 2021 02:30, Jim Brown wrote:
>>
>> An important part of the antenna system is a serious common mode choke
>> at the feedpoint if each antenna, so that current coupled from the
>> feedline doesn't fill in the antenna's nulls.
>>
>> 73, Jim K9YC
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