Home |
Search |
Today's Posts |
#12
![]() |
|||
|
|||
![]() "Fred McKenzie" wrote in message ... In article , Jeff Liebermann wrote: I hate to admit it, but I think I've built them backwards over the years. Maybe that's why J-poles have such a lousy reputation and why I think they suck? Jeff- Please pardon my ignorance. I understood that a J-Pole is a half wave antenna connected to a quarter wave stub. The transmission line is connected to a low impedance point (50 Ohms?) on the stub. In the literature, it is usually fed as an unbalanced antenna, but it is not. Therefore, it should not matter which side has the center conductor or shield - they are both wrong! Fred K4DII I acknowledge the split opinion on the feed. I've often thought it shouldn't matter, since the idea is to excite the stub (which is, itself, a half-wave if you count both sides). I follow the crowd, frankly. How would you change the feed method? I've had generally good performance from my J-poles but I'll gladly improve what I do, if you have some ideas. 73, "Sal" (KD6VKW) |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
QST antenna article | Antenna | |||
Nice MW antenna article | Shortwave | |||
Nice MW antenna article | Shortwave | |||
Nice MW antenna article | Shortwave | |||
Old ferrite rod antenna article | Antenna |