The "Ugly Balun" - WorldwideDX Radio Forum
2008年12月18日 · The "ugly balun" or coax choke is just a way to reduce CMC's. It is not a balun, and I agree, if you have no CMC's, it is pointless to add one to your antenna system. Baluns can be designed so they can transform impedance, a coax choke cannot. Also, baluns can be designed to work over a wide range of frequencies, all of HF for eg.
Like info on number of wraps needed to make "Ugly Balun" using …
2015年10月5日 · I would like to build....wrap up a Balun (ugly) using 8x coax to put under a 108in s.s. whip mobile antenna. Need to know outside diameter of PVC pipe to use, and number of wraps with coax. Thank you. Oh this is for the 11 meter band. 73
Adding an 'Ugly' Balun to My End Fed Antenna! - QRZ Forums
2024年3月16日 · As I did not have a regular 1:1 current balun at hand, I thought of adding an air core balun made out of surplus part of the feedline itself. Looked around for a three inch PVC pipe and found none in the store. It was then that the nice PET bottle in the kitchen table attracted my attention. It was exactly three inch in diameter.
Do I need a Balun? - WorldwideDX Radio Forum
2013年3月31日 · That "ugly balun" is really only an RF choke; it doesn't do any converting of balanced to unbalanced, and it doesn't transform impedances. You can build or buy a 1:1 current balun, but I wouldn't do that until the antenna is up and on the air. If you do use the "ugly "balun"", consider that it's not a one-size-fits-all item.
ugly balun deja vu - WorldwideDX Radio Forum
2012年7月21日 · I’m using a choke balun (9 turns of RG-213 on a 4” PVC pipe) for an m104c beam as one way to avoid interference. The last article I read says that the inability of the coiled coax to dissipate heat, translates into ‘warming-up’ of the cable, with a resulting change in impedance and an overall reduction of the power reaching the antenna.
The "Ugly Balun" | Page 3 | WorldwideDX Radio Forum
2010年3月7日 · A choke / balun has nothing to do with swr or signal. All an ugly balun sic (choke)will do is help keep stray rfi from getting back into your station on the coax shield. You also dont need one unless you are experiencing rf in the shack. It …
THE UGLY BALUN choke - WorldwideDX Radio Forum
2011年4月26日 · The example used for NOT using an 'ugly balun'/choke on that page mentioned earlier was if/when used with a horizontal dipole; not a vertical antenna. Two different animals. Don't even bother using a choke UNLESS you have CMC's; then chose the right one from the list.
The "Ugly Balun" | Page 2 | WorldwideDX Radio Forum
2010年3月11日 · a choke balun is not to stop stray rf from getting back into the shack, it is to stop the equal currents that flow inside the coax from been split between the radials and the coaxial outer shield, cm current flowing on the coax outer shield or mast is current lost from the radials,
Which PVC to use for a feed point on dipole? Is ugly balun needed?
2017年4月11日 · Ugly balun wont hurt and may keep your neighbors happy by reducing or eliminating CMC on the feed line.
RF choking - WorldwideDX Radio Forum
2009年9月16日 · 1:1 Choke Balun BUILD AN AIR WOUND 1:1 CHOKE BALUN FOR HF - THE UGLY BALUN! i hope you also find it usefull. As for the ground planes on the imax i'm still not sure on what your saying, but i'll bear it in mind. Has anyone else had any joy with the GPK for the imax and what was the results? Once again thanks guys..