A choke like that works based on several factors, such as how big the coils are, how many coils you have, how far away from adjacent coils each coil is. With this type of device, its not just the inductance (how many coils and their size), but that in conjunction with the capacitance between said coils creates a parallel resonant circuit, which has a very high impedance near its resonant frequency. If your randomly created coil of wire has a resonant frequency that is far enough away from the frequency you are using then its help will be minimal. If the coil of wires is randomly created how do you know that you are even close enough to a frequency that will be effective.
Long story short, if such a coil worked for you then you got lucky. Can you honestly tell me with certainty that using some other random length of coiled coax would be just as effective?
Also, did you read what he said later on that page? Much of what he said on that page, and other pages of his, are simply not true. For example, my previous post where I comment on his statement that SWR is the cause of common mode currents. No part of SWR travels on the outside of coax as he claims. Also, as I described above, it is not the electromagnet field around the coil of wires that prevent currents from flowing, its the high impedance of a parallel resonant circuit.
Eddie, did you ever put more than 100 watts through that random coil of yours? Can you honestly say it would have been just as effective at 1000 or 10000 watts? A properly made choke will be effective no matter the power level. If you follow certain basic and easy to follow instructions you can easily build a choke that you know for sure will work for the frequency you are using.
All this being said, I still prefer to use ferrites for chokes... They don't cost any more than the additional length of coax used to coil the antenna, and in some ways are more effective...
The DB
