Re: VTTC provisional results

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Herwig Roscher by way of Terry Fritz <twftesla-at-uswest-dot-net>" <herwig.roscher-at-gmx.de>


Ed Phillips wrote:

>  In a coupled-resonator system such as a TC, the 
"transformation ratio" is no indication of the voltage rise you might 
expect.

Ed,

Thank you for "enlightning" me again.

> Have you tried varying the spacing between primary and 
secondary while keeping things in tune?
- Yes. I made a series of tests, varying the spacing = coupling 
between  primary and secondary coil in 1/2" steps and looking for 
best results while varying the tank cap.

The goal was to make the coupling rather tight by engaging as 
many turns *at the lower end* of the secondary coil, because this 
part was wound with a thicker wire. I found that there was an 
optimum, but the point was not very sensitive.

> and once you have determined that you've done all you can.
- I assume that this is valid for a definite primary coil. Could coils 
with other impedances lead to different outputs? What's the way to 
go?

Regards,

Herwig