K3 - SWR Indication
Posted by
Geoffrey Downs-2 on
May 03, 2009; 11:12pm
URL: http://elecraft.85.s1.nabble.com/K3-SWR-Indication-tp2784793.html
In the past week I've been tuning and pruning an inverted V dipole I've put
up for 40m, fed with coax. The job isn't finished yet but I'm noticing
significant differences between SWR readings on my K3 and an external
LP100A.
For example: At 7.000 MHz the K3 currently shows 1.2:1 and the LP100A
2.00:1. At 7.200 MHz the K3 shows 1.0:1 and the LP100A 1.33:1. Both agree
that it's 1.0:1 at 7.145 MHz. My MFJ 259B shows similar readings to the
LP100A.
The differences seem more than one would expect from stray impedance in the
KAT3 as referred to when this subject was brought up on the reflector in
January this year. I've not made direct comparisons like this before so I
don't know if it's a recent phenomenon with my K3 (S/n 266) or has always
been so.
The readings were taken with PWR at 15w and the LP100A coupler connected to
ANT1 with a back-to-back PL259 adapter. ATU was of course in bypass mode.
Firmware 3.11.
What do others see?
73 to all
Geoff
G3UCK
______________________________________________________________
Elecraft mailing list
Home:
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/mmfaq.htmPost: mailto:
[hidden email]
This list hosted by:
http://www.qsl.netPlease help support this email list:
http://www.qsl.net/donate.html