Home |
Search |
Today's Posts |
#11
![]() |
|||
|
|||
![]() Yuri Blanarovich wrote: vs. "experience" = it can't be, but, but, but... ("proof") how does the coil have higher current at the top if it loses radiation through capacitance to W8JI? "Experienced" silencio!!! There is your sign! Yuri da BUm Yuri, It is so obvious to anyone experienced with antenna tuners how that can happen I really dodn't think it requires an answer at all. It is possible to build a "current step up network", or a "current step down network" with two or more reactances, one in series and one in shunt. What it is NOT possible to do is make a coil change current without that third path to the outside world. Standing waves will not do it, missing antenna degrees will not do it. Look at a simple L network when you have time, or more closely an L/C/L T network. You will find all laws of charge conservation are met. The current at any junction of one source path into two other branches always totals zero (current in balances currents out). The antenna is no different. The loading coil in a normal antenna mode might have a somewhat large phase shift in current of the coil has considerable shunt capacitance to the outside world or it might have almost none. This has NOTHING to do with standing waves causing the difference, or missing antenna degrees causing the difference. There isn't anything mystical or magical about any of this. The only problem is Cecil's theory, Barry's theory, and your idea doesn't fit all systems, and the models and workings presented by Reg, Roy, Tom, Ian, Gener, and others does work in **every** situation. I can make a mobile antenna that is resonant, change nothing but the coil, and have a mobile antenna that is exactly the same size and still resonant with different currents and phase of currents at both ends of the loading coil. I can do this simply by changing the coil's capacitance to the outside world. I can prove this. 73 Tom |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Imax ground plane question | CB | |||
Questions -?- Considering a 'small' Shortwave Listener's (SWLs) Antenna | Shortwave | |||
FS: sma-to-bnc custom fit rubber covered antenna adapter | Scanner | |||
FS: sma-to-bnc custom fit rubber covered antenna adapter | Swap | |||
Current in loading coil, EZNEC - helix | Antenna |