Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxj!houxm!vax135!cornell!uw-beaver!tektronix!hplabs!sri-unix!jhs@Mitre-Bedford From: jhs%Mitre-Bedford@sri-unix.UUCP Newsgroups: net.ham-radio Subject: Re: antenna tuners for receivers. Message-ID: <12257@sri-arpa.UUCP> Date: Fri, 21-Sep-84 11:48:00 EDT Article-I.D.: sri-arpa.12257 Posted: Fri Sep 21 11:48:00 1984 Date-Received: Wed, 26-Sep-84 06:27:28 EDT Lines: 18 I guess I am coming around to the view that if your receiver has a 50-Ohm input and that's it, brother, then a tuner would be useful. A preamp or an "active antenna" might be even more useful. My comment was based on my experience with older receivers which usually have an "antenna trimmer" or "preselector tuning" knob, which does one of the more important functions of a tuner, namely tuning out the reactance of the antenna so that it doesn't detune the receiver front end. Also, many of these receivers give you a couple of choices of input impedance such as a "short antenna" input as well as maybe 75-Ohm unbalanced and 300-Ohm balanced inputs. With this much flexibility, a separate tuner usually isn't much help. If you're stuck with a fixed 50-ohm input jack, that's different. If you REALLY want to hear some signals, try putting up a nice log-periodic rotary beam! 73, de W3IKG