Re: Negative Resistance

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

Original poster: "Wall Richard Wayne by way of Terry Fritz <teslalist-at-qwest-dot-net>" <rwall-at-ix-dot-netcom-dot-com>

,Dave, List:

 >          What sort?

NE2 or one of it's variants.  Much less then a dollar each.

 >          The 'signage' type tube is long, lossy,
 >          limited power handling capability.
 >          The common (not really, now) 'bulb' type has
 >          tiny power handling capability.

The idea is a *low power* instrument to determine primary tuning with both
the primary and secondary together and intact.  A relatively high voltage
mosfet can be used for a constant current Ne driver. The relatively low Ne
voltage after striking in another safety factor.

After the coil is tuned then you can "let 'er rip" to your hearts content.

As a matter of fact, this instrument may be extended by first tuning the
primary, then frequency sweeping the NE primary driver to determine exact
primary frequencies required for optimum secondary output for a particular
system. Surely you don't think that all of those infinite spark gap
frequencies are efficiently converted into secondary output?  A great deal
of SG energy in non transferred frequencies is wasted in the SG arc.  We
know that for sure.  Once the primary power and frequency spectrum for a
particular system is established then, and only then, can an efficient
primary driver be designed.  A matched system driver "loop" for frequency
and power spectra may drive a solid state, vacuum tube or magnifier TC.  No
CW of SG coils here.  Since losses in a conventional SG approach 40%-50% of
input power, this lost power may be made available for secondary output.

RWW

--- Richard Wayne Wall
--- rwall-at-ix-dot-netcom-dot-com