I always use Scotch 130, (self fusing tape), first, then Scotch 88. I
cut the tape down the long axis, and it opes up like a peanut, leaving
no residue or old tape.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources
On 6/3/20 12:48 PM, Buck wrote:
Electrical tape, then the self-fusing tape, then electrical tape. The
first layer of electrical tape makes it easier to removing the fusing
tape later
Buck, k4ia
Honor Roll
8BDXCC
EasyWayHamBooks.com
On 6/3/2020 12:58 PM, Clay Autery wrote:
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: [email protected]
<[email protected]> On
Behalf Of Dave Cole
Sent: Wednesday, June 3, 2020 7:27 AM
To: [email protected]
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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