[Elecraft] my KPA1500 and 160M

[Adrian]

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-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of David Gilbert
> Sent: Tuesday, September 1, 2020 12:28 PM
> To: elecraft at 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
>
>