I believe two points need to be made about this: First, if the SWR on the feedline was 1:1, changing the length of the feedline would have no effect. The conclusion is that the original SWR had to have been something other than 1:1. Secondly, the inductance and capacitance range of the KXAT1 is limited (3 inductors and 3 capacitors), the result of that is the impedance matching range decreases as the frequency is reduced. On 80 meters, the matching range is quite narrow, a bit better on 40, but on 30 and 20, the range becomes broader so that one can match most anything on 20 meters.
73, Don W3FPR > -----Original Message----- > Sorry Karl-Ron had it exactly right.Feedline length is always a > potential factor; I've run into it before and just forgot.Both with > coax and ladder line sometimes you have to add or subtract a bit for > impedance mismatch. You can look it up in the ARRL handbook In fact, > you can even do a fair matching job with ladder line bypassing a > tuner with the correct lengths.I added two feet of feedline and it > loaded right up sweet as pie. I also should have realized it wasn't a > shorted feedline as it still took some power and signal strengths > were not hugely different as when there's nothing connected. > -- > _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
