Here's an interesting mental experiment which I might actually do. Follow me and see what you think. Imagine a dipole antenna, center fed with balanced line and 20 feet long overall. According to the
Ok guys I will do the experiment. I believe I know the answer but validation is always a good thing. Here is what I will do: 1.) Start with a #10 or #12 self supporting copper wire dipole that is abo
ORIGINAL MESSAGE: REPLY: Sounds good, but don't forget to also measure with the disk connected at its edge as well as its center. The disk adds some capacitance to the antenna and lowers it's resonan
I see one problem with the expected results and I'm not sure how to phrase it. Instead of the conductor being a constant diameter you are going to add a very short section that is a larger diameter w
ORIGINAL MESSAGE: REPLY: True, but the LENGTH of the disk is tiny. I don't think the length would have any significant effect at the frequencies we are talking about. Capacitance, yes. 73, Bill W6WRT
That's why other than the capacitive loading it'll add little to the overall results. Instinctively one would expect it to add twice the radius to the length of the antenna, but it effectively adds a
I'm looking forward to seeing the results of this one !!! _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
ORIGINAL MESSAGE: REPLY: If the RF has to travel from the center of the disk, out to the edge, back down the other side of the disk to the center again, you have effectively added to the overall wave
There is no such thing as a fully shielded amp. The thru coax connector connection is not a perfect short at RF. There is plenty of surface area to pass the current. There are also numerous other ope
Did a small experiment: See www.pc5m.com/skineffect1.jpg - Groundplane with BNC connector and wire on top to ground - Connect sweep RF generator and spectrumanalzer parallel at BNC - At half wave res
ORIGINAL MESSAGE: REPLY: Not so fast... did you allow for the added capacitance from the disk? 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com htt
Don't know how big that capacitance would be, but expect very small (although that statement doesn't mean anything to the end result...) What I did do (to see if the capacitance from the bottom part
Correction: not 0.1 inch but 1 inch... _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
ORIGINAL MESSAGE: REPLY: No, because the capacitance, whatever it is, would no longer be connected to the wire. Try this: Measure the spacing from the bottom edge of the disk to the ground plane, the
Bill, You are right ! Changed my setup and to summarize the results: www.pc5m.com/skineffect2.jpg ). Fres = 260 MHz www.pc5m.com/skineffect1.jpg) . Fres = 260 MHz I suppose I can only conclude that t
You are drawing a conclusion without knowing all the information needed. The disk on the antenna acts like a capacitor to the rest of the antenna. Read a little on how an antenna works. It depends up
Gary, Is anyone evaluating the test to account for the capacitance? I'm sure I'm not the only one fascinated by this skin effect 'proof test' It's beginning to sound like one of those relativity para
Please re-read the results of the experiment. Tests #3 and #4 did exactly what you are suggesting. Larry, W0QE _______________________________________________ Amps mailing list Amps@contesting.com ht
Yes Larry, but the conclusion drawn by the one doing the experiment was that the current "must go thru the disk when placed in the middle". No account for capacitance was given. Unless I am reading t
I wrote the original post on 3/15 because the Ten-Tec Titan 425 is laid out as described. There is also a 20-ohm 25W wirewound series resistor making up part of the 11-inch lead-length from the cold