Tom Hammond-2 wrote: > > Yes... and the SWR (AT THE POINT AT WHICH YOU'RE MEASURING IT) is going to > REMAIN 5:1 for a long time... hopefully... if it changes, then there's a > problem with your antenna. > And what's more, if the feeder is very long, it could result in significant signal losses. Take a look at the chart at http://www.g4ilo.com/mismatch_losses.html which shows the amount of loss at different frequencies for RG-58, RG-213 and open wire feeder. This is in addition to the loss normally expected because of the feeder length.
The Elecraft tuners have a great ability to match a wide range of loads (compared with the auto ATUs in other transceivers) but they can't do anything about this problem. If you have a non-resonant antenna and want to feed it with co-ax then the best place for the ATU is at the antenna feed point not the back of the radio. Built-in ATUs are really meant for matching resonant antennas that present a slightly too high SWR when used near the band edges. ----- Julian, G4ILO K3 s/n: 222 K2 s/n: 392 G4ILO's Shack: www.g4ilo.com Zerobeat Ham Forums: www.zerobeat.net/smf -- View this message in context: http://www.nabble.com/KAT3---Antenna-tuned-or-not--tp15153564p15159506.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ 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
