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/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
