Re: The 1500t secondary myth

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Interesting!!!  If you wind too many turns the secondary coil's 
"resistance" can start to be a real killer...

The LTR coils tend to like a bit smaller secondary inductance, but the 
newer DRSSTCs don't care much...

I note that DRSSTCs might like the lower peak current primary caps (full 
metal film, cheaper...) too!!!  Dr. Resonance has 150nF 2kV full metal film 
(not the higher current foil) caps in stock too...  DRSSTCs may not reach 
as high peak voltages either, so not as many are needed....  A DRSSTC cap 
maybe much cheaper still than their equally performing LTR conventional 
coil caps!!  Like 30nF at 10kV for just $10 ;-)))  that would make the 
primary cap almost a "trivially easy" part...

Cheers,

        Terry



At 06:44 PM 12/15/2004, you wrote:

> I also built a 3,000 turn coil last year.  I saw no performance gains
> (actually a bit less) that our normal 1,400 turn coil.  Both coils were
> operated with the same cap size (same energy input) and same size topload,
> with a non-sync rotary gap for comparison.  The 3,000 turn coil performed a
> bit less than the 1,400 turn coil.  I think the resistive losses began to
> get too high.
>
> Power was provided by the same 14.4 kV PT set for 250 mA output.  We
> monitored input current to set output with an adjustable power reactor.
>
> My conclusion was the 1400-1600 turns range provides the best coil
> performance.  Beyond this nothing is gained.
>
> I wish to note our experiments were conducted with classic design TCs and
> not a magnifier type design.
>
> Dr. Resonance
.....