Re: my KPA1500 and 160M
Posted by
David Gilbert-2 on
Sep 01, 2020; 5:27pm
URL: http://elecraft.85.s1.nabble.com/OT-WWV-Time-Transmissions-tp7664561p7664586.html
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
On 9/1/2020 9:36 AM,
[hidden email] wrote:
> This morning I put up a W7FG true ladder line 160M doublet. Upon
> testing, the K3 internal atu does great, matches at 1.3:1. But when I
> throw the KAP1500 in line, it gets all pissed off, throws up and
> faults out. Says SWR is 99:1 !!!
>
> The Antenna: The Apex is at 50'. It is in a inverted Vee config,
> with both ends approx 20' off the ground. I'm using 59' of the 600
> ohm true ladder line to a Balun Designs 5KW 4:1 Balun. This is fed
> with 22' of Wilson LMR400
>
> Both the K3 internal atu, AND the KPA1500 internal atu get a great
> match on 80M, 1.2:1 with no issues.
>
> Honestly, most of the work on 160M is FT8 running 20 watts or less, so
> just using the K3 to get a successful match on 160M is fine
>
> I just wonder why the KAP1500 doesn't like the same antenna the K3 likes.
>
> Any ideas here fellers?
>
> thanks and 73
>
> 73 and GL OM DE w5sum
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