Secondary design help
I'm building my first "big" coil, and would like to make it as good as
possible without making too many mistakes.
So far, my design consists of a 1.8kVA input (dual 15/60 NSTs) with an
LTR-style MMC (56nF). My primary is .50" copper tube spaced .50." I'm
working on a SRSG at 120 BPS. I'd like to use a 6.27" OD, 6.07" ID x ~30"
PVC secondary with 22AWG wire.
The only areas that I'm still trying to investigate are the secondary
design and the topload. First, I've read that PVC doesn't make a very good
form due to its high RF losses. Secondly, I'm concerned that 22 AWG is too
small, and that I should use 20 or 18 AWG. Finally, I'm also concerned
that the topload is too small ("Top loads can NEVER be too big"). I've
thrown a 6"x 24" toroid into WinTesla, with a capacitance of 32pF. I've
seen on one Web page that the recommended toroid size for a 6" coil is
8"x40" (60pF) (in conjunction with an anit-corona ring, which I may add
after I get it built and working well).
So, my questions are:
1: Will I gain much by using a PE (or similar) form over a PVC form?
2: Is 22AWG wire OK on a 6" coil running at 1.8kVA?
3: Is my topload of 6x24" too small for my coil? (I DO intent to make
a couple, but I'd like an idea of where to shoot for)