Topband: 160 metre vertical with 'top loading'

[k3bu at optimum.net]

I do not want to start the argument all over again. One would expect people to read the material or argument carefully, trying to understand it and comment aproprietly.

Just to set the record straight:
It is not my famous picture but Barry's, W9UCW. He set up real life situation and I was pleased to find it as a confirmation to what I found to be happening (RF current at ends of the loading coil on a 1/4 wave resonant, standing wave antenna, is different).

Again, to simplify and illustrate the situation, I think I presented my view, experiences and real life measurements to illustrate what is really happening. Want to prove us wrong setup the experiment and see what is happening. Obfuscating the case with toroids or whatever is not proving anything.

We are dealing with resonant and RF circuits and not DC current and circuit. If the RF current can vary along the solid piece of antenna wire (or is that denied too?) why is it so hard to admit that it can vary when that wire is coiled or folded into hairpin (inductance)?

As far as "politics" I do not like ridicule, especially when I am convinced that I am right. It was the other party who ridiculed our findings, and it wasn't the first time. Worshipers can continue to worship what they choose, one can believe in flat earth too or their own lying eyes. There is only one result - measurable reality.

As I mentioned before, it took me some years to "discover" and realize the effect and I began using it in loaded antenna design. I wrote it up in hope for others to realize this and use it in antenna designs to achieve more accurate results. Understanding the effect, it allows one to insert the loading element at the point in the antenna structure with the minimum detrimental effect. 

I have answered few direct emails and hope that it helped, which was the whole purpose of the exchange - to understand the effect and use it for better antenna design.

73 Yuri, K3BU.us
www.MVmanor.com  home of the Glen Spey RadioFest July 23




> I think it would be good to do Yuri's famous picture with a coil of
> identical inductance, but that is evenly wound around a T300A-2 iron
> powder toroid, or the smallest that can create the inductance.
> 
> I don't think the actuality is nearly as simple as the opposite
> arguments. If the coil is spread out so that the field of the first
> turn does not substantially encompass the last turn, then substantial
> differences will occur in the current because it's acting more 
> like a
> miscellaneous wire, and modeling with separate inductors is more
> accurate, and the length is the issue. This would be the case in
> Yuri's picture with two RF ammeters on either end of a long 
> piece of
> coil stock.
> 
> But, if the field of the first turn completely encompasses the last
> turn, as in a fully covering winding on a powdered iron toroid, or
> tight layered turns on ferrite core forms, and cannot be 
> affected by
> other close fields (like the antenna wire itself) then the 
> fields and
> currents are substantially forced into self-compliance across the
> winding.
> 
> These are opposites. Neither all length or all lump will work
> properly as the physical details will determine where a given winding
> falls on a scale between all lump and all length. This is the same
> kind of issues that occur getting into VHF where capacitors 
> become RLC
> networks, and you can't use caps in a VHF circuit unless you 
> know the
> RLC of a cap and account for it in the circuit. Ditto with all wires
> are now inductors, etc.
> 
> Once one understands this irritating detail, there are situations
> where coil stock and wound toroids each display advantages that may
> recommend one or the other.
> 
> I think it very unfortunate that the demonizing and name-calling of
> our current political climate has worked its way into science. It
> destroys possibilities in both politics and science.
> 
> If two responsible experimenters get opposite results in what on
> surface are identical experiments, THERE IS A REASON, which means
> THERE IS AN OPPORTUNITY TO DISCOVER AND ADVANCE. It does no 
> good at
> all for the owners of the different results to accuse the other of
> using satanic rituals to obtain their results.
> 
> 73, Guy, K2AV