That's a sad commentary on the state of modern ham radio.... To, k2bew On Thu, Oct 10, 2019, 10:12 PM Bob McGraw K4TAX <[email protected]> wrote:
> I used my Johnson Matchbox at our Field Day event about 3 years ago. I > went through each band and several frequencies on each band and compiled > a written chart identifying the settings for each band/frequency. > After 2 hours of trying to work stations on 20M, the radio failed and > they came to wake me from my late night nap. The result is the > Matchbox was adjusted for 80M in the CW portion and the operators were > complaining of high SWR and no power output on 20M. It took 2 hrs for > them to observe this? I was amazed at the number of "Extra Class" > operators at the site that thought the tuner was automatic and would > change with band / frequency changes on the radio. The radio by the way > WAS NOT an Elecraft product. > > 73 > > Bob, K4TAX > > > > On 10/10/2019 7:35 PM, Don Wilhelm wrote: > > Joe, > > > > I agree completely, bring your Johnson Matchbox to the next Field Day! > > Or even your old plug-in coil open frame link coupled balanced tuner. > > > > Who has a link coupled tuner (like the Johnson Matchbox) these days? > > Those are big boat anchor box these days (and hard to find). I have > > one that sees little use, but I am not willing to part with it. It > > does a good job when needed. > > > > Most autotuners are of the L-network design and the manual tuners are > > typically T-network - the L-network can be a high pass or a low pass > > filter, but the more common T-network is always a high pass filter. > > If one has an old Collins tuner, it may be a Pi-network which is a low > > pass filter. > > > > As you pointed out, the link coupled tuner is a bandpass filter, but > > fixed tune bandpass filters will do just as well for multi-station > > operation. > > > > 73, > > Don W3FPR > > > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
