Hi, I'm a CW operator who dwells in the lower end of the HF bands. My current antenna is a 200' horizontal delta loop 40' high, fed with 87' of 450 ohm ladder line. This connects to a 4 to 1 balun (common mode choke?) which is attached to my Dentron Jr. Monitor tuner via 5' of RG213. Looking at a spreadsheet, I see that a full wave loop for 80 meters is 287' and 143.57' for 40 meters.
A hypothetical question to the wise ones on this list is would I expect any practical improvement in performance of my antenna system (on 40 meters and above) by reducing my 200' delta loop to 143.57' and feeding it with 71.78' of ladder line so that the sum of the antenna length plus twice the ladder line length is 287'? This seems to make theoretical sense since the entire system would be resonant at 7mhz and integral multiples thereof. However, the performance of my current 200' loop appears to be quite good from 80 to 6 meters and my small tuner matches whatever impedance this system is presenting to it so I'm hesitant to take a pair of snippers to my antenna. I would like to increase the length of the loop to 287' feet and feed it with 71.78' of ladderline but that is another story. Also, would I expect to be able to tune any of the these three antennas on 160 meters if I were to purchase either a KXAT100 or KAT500 tuner which presumably have a wider tuning ranges than the Dentron Jr. Monitor tuner? Rick McClelland, AA5S Fort Collins, CO ______________________________________________________________ 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
