Re: slow-wave helical resonator

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

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
> 
> Original poster: "Gary Peterson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <glpeterson-at-tfcbooks-dot-com>
> 
> > In my interpretation of the magnifier circuit, the transformer is
> > optional. The essential circuit is directly coupled:
> 
> Yes, I think you're right.  At the C/S experimental station Tesla would
> occasionally excite an experimental coil using direct coupling to the large
> oscillator's primary tank circuit or some variation thereof.  See
> www.tfcbooks-dot-com/writings/images/discover.jpg for an example.  Does anyone
> on the list have practical experience with this form of magnifier?

I picked my CS Notes to see if I find this. I'm still looking, but
I found something interesting:
In the page of Sept. 19 1899, Tesla shows some connections of the
extra coil of a magnifier. One of them, that he says that is the
best, includes a capacitor in parallel with the secondary coil. He
ends saying "the question is what is the best length to give to
the wires". So, Tesla knew that the system has to be upgraded to
6th-order (three resonances) to have best results.

Antonio Carlos M. de Queiroz