Re: What size secondary?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi Stephen,

What is best isn't a simple answer. Each can be built to perform well.

If the 6" secondary, something like this:
Helical L2: 6" x 27", 24 awg, 1200 turns.
Flat L1: 9" ID, 22" OD, 1/4" tubing, 1/2" pitch (center to center), 
13 turns (12 turns minimum).
Vertical Proximity: L1 even with L2 bottom turn. k=0.138
MMC Cap: 3 strings of 16 caps per string for 0.0188uF total, using 
CD942 series 0.15uF caps.
Toroid: 5" x 21", 2" elevation from top of L2 to bottom of toroid.
Static Gap: 6 tubes (4"L x 1.25"W copper pipes). 0.05" spacing 
between each (0.25" total gap). Hefty fan.
And use a Terry Filter.

If the 4" secondary, something like this:
Helical L2: 4" x 22", 24 awg, 1000 turns.
Flat L1: 7" ID, 17" OD, 1/4" tubing, 1/2" pitch (center to center), 
10 turns (8.3 turns minimum).
Vertical Proximity: L1 raised 1" above L2 bottom turn. k=0.139
MMC Cap: 3 strings of 16 caps per string for 0.0188uF total, using 
CD942 series 0.15uF caps.
Toroid: 5" x 21", 2" elevation from top of L2 to bottom of toroid.
Static Gap: 6 tubes (4"L x 1.25"W copper pipes). 0.05" spacing 
between each (0.25" total gap). Hefty fan.
And use a Terry Filter.

Take care,
Bart

Tesla list wrote:

> Original poster: "stephen costanza" <baywatch106@xxxxxxx>
>
>
> I have a 12000 60ma NST,will be using the cd 942's and 24ga magnet 
> wire. What size secondary should I use? I've been looking  and some 
> people are using 4" pvc and some are using 6'' pvd diameter .
> I orginally was planning using 4" pvc with a toilet flange to 
> support the secondary.
> Any ideas on what size is best? I