Rich, Yes the tuner acts as a preselector and peaks up the signal. Years ago I wrote W6AM a letter asking him if he used an antenna tuner with his rhombic antennas. He replied that he did use a tuner but not so much to improve the impedance match to the rhombics for transmit, (he had them tuned up pretty well) but to act as a preselector to peak up the signals. He went on to describe his setup, using Collins 75A4 receivers and a Johnson KW matchboxes. He said the big Johnson KW matchbox, not the smaller one, was very effective at peaking up the received signal. I was convinced that the tuner was a a good thing to have in line for receive if he had receive enhancement using the tuner with his big rhombics !
Bob K6UJ On Mar 28, 2011, at 11:05 AM, Richard Fjeld wrote: > For me, receive capability was an important factor, among others, in the > decision to buy an Elecraft. The model is irrelevant to this post. For years, > I have been studying comments made about receiving, as opposed to those who > think a radio is 'good to the last watt'. Recently, there was a rather > lengthy thread about whether a K3 user was having receive problems or not. > I'd like to share an experience with the group. > > Over the years, I have used coax fed antennas and lived with compromise SWR > figures. I wanted an all-band antenna so I recently changed the 80 meter > dipole so that it is center fed with homebrew 450 ohm ladder-line to a tuner. > I use an MFJ Matchmaker (TM) to 'tune the tuner'. While it puts out a white > noise, I tune for minimum S-meter reading. When finished, a quick transmit > reveals the SWR. > > One day while tuning close to optimum at the frequency I was on, and because > I receive while I tune, I began to hear a weak CW signal. At first, I thought > it had just come on frequency, but as I listened, I realized that the station > had been in qso for awhile, but I didn't hear it until I reached optimum > resonance with the tuner. I knew a resonant antenna was important, but I was > surprised at the difference it could make in receiving. A good receiver is > wasted if the signal doesn't get to it. > > > Richard Fjeld, n0ce > [email protected] > I'd rather be learning. > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
