[Elecraft] FIXED--was NOT the feedline

[Dave Cole]

Hi,

Is the open end of that feedline where it connects to the antenna 
weatherproofed?

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 6/2/20 8:15 PM, Peter Dougherty wrote:
> HI all,
> 
> A postscript to the problem. First off, a huge thank you to the many replies received. I was fortunate that the problem was not in the KPA-1500 as I'd originally feared.
> 
> Much troubleshooting within the past few days. Originally the amp was "iffy" on the old M-squared 6m5, and problematic (faulting) during damp or wet weather. This prompted the replacement of both the antenna and feedline.
> 
> The hard faults were still occurring, until it was suggested the Ten-Tec 238 tuner that I was using exclusively for the built-in antenna switch was now the issue. I took this out of line today, and lowered the tower to fine-tune the LFA's feed point and now everything is humming along just nicely. The KPA-1500 is happy at 1.5 kW and showing an SWR of 1.2 in dry conditions. I will keep my fingers crossed that the wet weather expected in the next day or so won't bother it all that much.
> 
> The final step was to move the 6m feedline from the secondary inlet box to the main antenna switch on the big tower. The downside here is I now have an additional 70 feet of BuryFlex in the line, so I'm guessing a total of about 1.5 to 1.7dB of feedline loss. This is something I would like to address in the future with an eye to dropping it below 1dB.
> 
> Screencaps: https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%20switch.png?dl=0
> 
> And
> 
> https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%20tuning.png?dl=0
> 
> And for the balun discussion, this is what's in place, before the double-walled heat-shrink was applied: https://www.dropbox.com/s/18pgthl67rtq3bl/2020-05-31%2017.51.08.jpg?dl=0
> 
>   - pjd
> 
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