Sure if you have the time and supports, but if you are setting up a temporary station for a few hours you don't want to waste operating time. A 9:1 or even 4:1 unun can get you on the air quick. Need only 1 support. A counterpoise and a choke of some kind on the feedline does help.
On Sat, Dec 12, 2020, 23:22 Bob McGraw K4TAX <[email protected]> wrote: > The comments are good . But considering all the pluses and minuses, > wouldn’t it make more sense to use a OCFD and not worry about ground rods, > counterpoise needs, high SWR, high voltage and currents in the tuner? A > well designed OCFD with correct Balun plus a common mode choke at the feed > point and another at the radio will cover 80M - 10M with much less than a > 10:1 SWR. > > A matched condition exists only between the ATU input and the PA output. > The output voltage or current can be all over the place, including inside > the ATU circuits. And the ATU has a 10:1 matching range of 5 ohms to 500 > ohms. Random wires can easily be outside of this range. Thus the ATU can > not effectively match the load. > > Bob, K4TAX > > > Sent from my iPhone > > ______________________________________________________________ > 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]
