Alterations worth doing?

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

Original poster: "Tom Luttrell PWRCOM" <tom-at-pwrcom-dot-com.au> 

I dropped my secondary coil on a sharp edge and irretrievably stuffed it!

Since flattening the primary (was 30° conical) and raising the secondary up 
~2" this coil has performed brilliantly (~1m arcs for 880VA in).

However the need to rewind the secondary led me to wonder if the following 
modifications were worth doing.

Current design:
===============
~760t of 0.9mm (150mm dia x 680mm tall, 4.53:1 h:d) secondary

22nF 27kV MMC resonant with 11kV 80mA NST (50Hz)

Primary tap point = 8t


Planned design:
===============
~1200t of 0.6mm (155mm dia x 700mm tall, 4.51:1 h:d) secondary

35nF 27kV LTR MMC (same NST)

Estimated primary tap point = 8t


So by winding more turns with smaller gauge wire and balancing this with an 
LTR primary cap I get about the same primary tap point and hopefully will 
not need to alter the primary winding copper tube at all (I only have 2 
extra turns, for a total of 10t available).

The original reason for so few turns in the secondary was to reduce the 
resistive RF losses by using large gauge wire. It will be interesting to 
see how the two coils compare.

I was not ever worried about my NST overvolting (resonant kick) as the 
static gap is not too wide and in parallel with the NST. However seeing if 
the extra energy available from the LTR cap is worth while should be 
interesting.

So far every modification I have made to my original design has brought my 
coil closer to the accepted practical design rules touted on this list - 
with excellent results - and these last two modifications should make an 
interesting comparison.

Tom.