Clay, I see you've received offers for data on the feed point impedance and VSWR of an 80M loop. If you feel you need more just let me know. I have modeled, built and used a number of 80M loops very successfully. Properly sized and fed, they offer well under 2:1 SWR within all the HF bands with the exception of 60M and 30M and perhaps 80M depending on the installed height. 300 ohm window line (more nearly 265 ohm) with a 4:1 balun can work very well. If you feed a square loop 80M at 1/3 the distance from any corner, the feed point impedance at resonance will be in the 200-300 ohm range...a good match for 300 (265) ohm window line and a usable match for a 4:1 balun.
Modeling is a wonderful way to experiment with the design. You can play with loop circumference and the window line and coax lengths to optimize the SWR across the bands. We use these regularly at field day and only need a tuner on 80M. --- Chuck, AE4CW ----- --- Chuck, AE4CW -- View this message in context: http://elecraft.365791.n2.nabble.com/80-Meter-loop-question-tp7615830p7615851.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
