[Elecraft] FIXED--was NOT the feedline

[Clay Autery]

I've got to get to class, but there are a NUMBER of different methods 
and procedures that are used.

Self-fusing tape properly applied covered by top-quality electrical tape 
to protect the self-fusing tape from UV...
There are specific points on installation that you want to observe.

Someone will chime in with deatil or a reference to a procedure...  If 
not, I will do it later... Class in 3 minutes.

73,

______________________
Clay Autery, KY5G
(318) 518-1389

On 06/03/20 10:35, Peter Dougherty wrote:
> No, and I wasn't sure how to accomplish this. It's stainless hardware, but
> I'm guessing I should probably wrap the feedpoint up in self-annealing tape
> and Scotch 88 just to be safe.
>
>   - pjd
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
> Behalf Of Dave Cole
> Sent: Wednesday, June 3, 2020 7:27 AM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] FIXED--was NOT the feedline
>
> 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%20s
>> witch.png?dl=0
>>
>> And
>>
>> https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2
>> 0tuning.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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>>
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