[Elecraft] my KPA1500 and 160M

[Dick Dievendorff]

What is the SWR of the antenna if the K3 ATU and KPA1500 ATU are both
bypassed?

Keep the KPA1500 in mode STBY and ATU Mode BYP for this.

73 de Dick, K6KR


-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of w5sum at comcast.net
Sent: Tuesday, September 1, 2020 09:37
To: Elecraft Reflector <elecraft at mailman.qth.net>
Subject: [Elecraft] my KPA1500 and 160M

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 

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to dick at elecraft.com