Overheat is a situation taking time, and usually starts with a good
match, then deteriorating.
In this case ; "But when I throw the KAP1500 in line, it gets all pissed
off, throws up and faults out. Says SWR is 99:1 !!!"
indicating an instant issue while the balun is still stone cold...
The 5kw balun is not the best for your situation, but rather the 4116
3KW hybrid
https://www.balundesigns.com/model-4116-4-1-hybrid-balun-1-5-54mhz-3kw/
See ;
https://www.balundesigns.com/blog/baluns-for-multiband-antennas-fed-with-open-wire-or-ladder-line/
73
Adrian Fewster
On 2/9/20 10:12 pm, Bill Johnson wrote:
I would agree that the coil could overheat. The model number is left out. The
Balun Design coil chosen may not be satisfactory for your power despite the 5KW
rating. Which Balun are you using?
Bill
K9YEQ
-----Original Message-----
From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On
Behalf Of David Gilbert
Sent: Tuesday, September 1, 2020 12:28 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] my KPA1500 and 160M
One distinct possibility is that the 4:1 balun is getting hot at 1500 watts.
Have you tried running the KPA1500 at a lower power?
73,
Dave AB7E
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