I had a similar problem on the same setup. Turned out to be moisture in the
Balun.
Jeff, N0OST
On Monday, August 1, 2016, Timothy Holmes <taholmes160@gmail.com> wrote:
> Hi folks. Sending this to multiple groups to gain expertise.
>
> My primary dipole is acting strange. Its 135 feet of wire up 40 feet. Fed
> with ladderline. As I am transmitting I noticevthe swr going from low to
> high suddenly for a few seconds and then back. Initially I thought it was
> my auto tuner showing damage, butvI put an MFJ manual tuner in place and I
> can clearly see it happening on the meter. I dont think it is wind moving
> the wire, as it was calm when it was happening. The feed goes from the
> rig, through the antenna switch to the tuner, then out the window via a
> bulkhead connector and to the 4:1 balun via a 2 foot coax, and then to the
> ladderline.
>
> Any ideas on where to look for issues, and or testing methods?
>
> Thanks
> TIM
> W8TAH
> --
>
> Tim Holmes - W8TAH
> Sent from my LG Stylo
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