Ed, The KAT1 (and most other similar tuners) do have a difficult time matching to a high impedance. So if you stay away from end fed antennas that are a multiple of a half wavelength long, the KAT1 should be able to match it. Similarly, extremely low impedances may be difficult to match.
You might try adding or subtracting some length to your feedline. I would suggest starting with a 1/8 wavelength at the frequency that is giving difficulty. Try to get the SWR down to 2:1 or less. While the K1 probably will not be damaged, the power output will go down dramatically with a larger mismatch. 73, Don W3FPR E Neubauer wrote: > Hello: I have noticed that my k1 (with the kat1) seems to have difficulty > obtaining a low SWR with most of my antenna efforts. Most of the time, it > stays at 4:1 or higher. I have been successful at obtaining 1:1, but it is > kind of hit-or-miss and only works for one band. I live in a townhouse, so > options aren't great, but I've mostly tried long wires and loops in the attic > and yard. Still, I thought obtaining a decent match wouldn't be so hard, > especially on 40 meters. I should note that I have the 2-band filter board > for 40 & 80 meters. > Also, I am new to ham radio, so I am not sure whether it is safe to operate > the rig when the SWR is that high. Comments or suggestions appreciated. > 73,Ed KB3SZZ > _________________________________________________________________ > Insert movie times and more without leaving Hotmail®. > http://windowslive.com/Tutorial/Hotmail/QuickAdd?ocid=TXT_TAGLM_WL_HM_Tutorial_QuickAdd_062009 > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.339 / Virus Database: 270.12.80/2187 - Release Date: 06/19/09 > 06:53:00 > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
