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>

Hi Steve,

>
> Good for you - DC is fun to experiment with!

I'm glad someone else thinks Dc is a good thing to investigate!

>One suggestion.  Do NOT charge
> your tank cap directly from your DC supply.  This is very hard on the tank
> cap and the DC filter caps.  Roughly half the charging energy gets
> dissipated in the resistance of the circuit, i.e. the wiring and the caps
> themselves.  Adding resistors between the filter and tank cap reduces
> stress, but again, you end up wasting half the energy in that resistor.

Thats what I was doing to start with. the caps should be ok, I do understand
the stress involved.

>
> Instead, charge your tank cap through your primary, then discharge it to
> ground through your primary.  This is much more efficient.  Might as well
> put the charging energy into your coil instead of heating and stressing
> components.

swap tank and pri you mean ?

>
> As far as resonant charging, you only need 20 Henry or so to do the job,
as
> long as you keep the BPS above about 300 BPS.  Below that, it will
power-arc
> when the reactor saturates.  A couple of MOT secondaries in series will

Yes higher BPS does help. I said in another post I tried a NST secondary
which worked.  As It blew the diodes I might try AC again to make sure i've
not lost anything else in the process. more investigations are to come....

Chris