While a T-network is not necessarily lossy at moderate impedances, try using one to load up a short antenna.
For example, a 25 foot end fed wire on 80 meters will show an impedance of about 3-j550 ohms. A T-network tuner will match it okay, but with a loss of 7 dB! That's a loss of about 79% of the RF passing through the tuner. That's why I might T-matching network for moderate mismatches in the vicinity of 50 ohms, but avoid them for wide-range matching of multi-band antennas, most especially any antenna that is less than 1/4 wavelength long. A T-match is good at producing a 1:1 SWR to the rig okay, but so will a dummy load. The Elecraft ATUs, by the way, use an L-network instead of a T. That's a whole different "animal" and a lot more efficient. Ron AC7AC _______________________________________________ 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
