Home |
Search |
Today's Posts |
#14
![]() |
|||
|
|||
![]()
Dan,
I appreciate your reply, but it is filled with misinformation. Consider reading some reference materials. The errors have been discussed in other responses to your post. I don't mean to insult you for trying to help, but the information you provided is so incorrect, that I couldn't let it pass. I hope no one attempts to make use of what you said...it will only compound the error. I asked simply is it worth it? (in terms of loss). Wes had the calculator software that showed the loss is insignificant, so it saves the work/complexity at the base of the antenna. Radiation from the feedline is not a function of mismatch. I'm surprised Reg didn't go apoplectic over that one. The tuner in the shack will do the job nicely. ....hasan, N0AN "dansawyeror" wrote in message ... Since you are talking about 50 Ohms I assume you are talking about a transmission line. If that is the case you should definitely match the feedline to antenna at the antenna feed point. Any attempt to match the feedline with a tuner in the shack only turns the whole feedline into part of the antenna system. By doing that you have lost any good work in building the antenna. Dan hasan schiers wrote: I found the error, I had to fix two conditions that I had changed in the model: Copper wire (for loss) Ground characteristics Now that both antennas have the same conditions, the T has ever so slightly better gain at 20 degrees than the Inverted L. Not enough to bother with the increased complexity, and the input Z is now down around 5 ohms for the T and 8 ohms for the L. Now, is it worth matching the 8 ohms up to 50 at the feedpoint, or just using the tuner in the shack to take care of it? (coax feed, LMR-400, about 50') ...hasan, N0AN "Roy Lewallen" wrote in message ... John Ferrell wrote: . . . I am a perpetual antenna student! And so are we all. Roy Lewallen, W7EL |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
160 thru 20 meter homebrew vertical system | Antenna | |||
10, 6 & 2 Meter Vertical | Antenna | |||
Advice good 80 meter vertical | Antenna | |||
Conix 160 Meter Vertical --CQ | Antenna | |||
Smith Chart Quiz | Antenna |