Re: DC power

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

Original poster: "Chris Swinson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <exxos-at-cps-games.co.uk>

Kevin,


> Original poster: "Kevin Ottalini by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <ottalini-at-mindspring-dot-com>
>
> Chris:
>         You need to simplify your approach.  Take a look at my web site
for
> info
> on DC driven Tesla Coils:
>
> http://www.mindspring-dot-com/~ottalini/

I took a look at it, thats one of the designs I have tried. Though I have
not tried a 10K resistor mine was a 200K.


>
> The tanks capacitor and primary are still a resonant circuit so their
values
> are pretty much independent of AC or DC ... you have to get them in tune
> with your secondary and topload regardless, so do that first with any of
> the fine coil calculator programs available (check www.pupman-dot-com).


The coil was run and tuned and working with AC. I wouldn't have thought DC
would change that much. Sure has proved me wrong in many respects now. I did
check the archives out a few weeks ago for DC information, Though I am still
at a loss ( bad pun there ? )

>
> I use a series resistor to protect the rectifier bridge, but an inductor
> would be more efficient ... it is hard to get 1H or 2H 20kv inductors
> that can handle 4kw though!
>

I tried 200K resistor, with and without spark gap, spark gap on its own and
yesterday a NST secondary. All of which didn't really do anything.

> The other thing is your RSG needs to be changes to asynchronous ...
> IE:  variable speed.  You can run the RSG at any speed that your
> supply can handle or that gives you the most interesting results.
>

It is variable speed. higher the speed the better so far. Though I dare not
run my gap to fast as it might fly apart. The output went from sparks to 1
flame like arc at high BPS. pushing it more made it arc a bit further though
it started to pulse on and off.

Chris