I could use some help with a MagLoop. I constructed a 48" loop from 3.8" copper pipe. I have a 51 pf capacitor across the open end of the loop. I am feeding the loop with a 4 turn coil around the copper pipe opposite of the capacitor. Before checking the loop I tested a carbon resistor on the balun (ant side). Using a 50ohm resistor on the ant side of a 1:1 Balun which was fed with a 2' piece of 50 ohm coax and with the loop disconnected I get the following readings from a MFJ 259B antenna analyzer:
Freq Resistance X 9.7mhz 66ohm 0 10 68 0 12 77 0 14 89 0 17 109 0 21 126 0 27 128 0 27.6 78 0 Reattaching the feed coil and the balun I get the following readings Freq Resistance X 9.7mhz 18ohm 77 10 20 81 12 43 119 15 163 203 16 303 282 16.5 406 120 16.56 440 0 17 547 0 21 >650 21.3 467 114 24 95 191 27 38 129 27.6 34 120 29.1 21 104 I ran all these test trying to find out what the resonance is for my 51pf capacitor. Rather than helping me, I am more confused. I was not finding anything like the normal response I have been led to believe I should experience with a magloop. E.g. peek noise at the resonance frequency. John AD2F ______________________________________________________________ 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
