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RE: Advice on Secondary

Original poster: "Medina, Benjamin Alejandro (UMR-Student)" <bamxbb@xxxxxxx>


Mike,

Hello. How are you? Thanks for your reply and suggestions. Sorry I took
this long to reply but I have been busy with school stuff.

Ok, well we're done with the secondary. 4"x30" PVC with 1" free on both
ends wounded with 22 AWG wire.

We are shooting for our first trial on the 2nd week of February.
Depending on how that goes, we will go with a 6" diameter PVC and/or MMC
caps. We'll see how it goes. Thanks for your comments..

Regards,
Ben Medina


i'd keep the 30" length and go for a 6" dia. secondary. with 22" you're
prob gonna get alot of arcs to the strike rail, tho maybe not with a
glass
cap, which is gonna be lossy (due to corona and dielectric heating) and
quite heavy. I once tried a gallon-sized pickle jar that worked fine for

storing charges from a small vdg, but shattered when running after
awhile
in a 15/60 tc. Not sure if it was heat (glass was quite warm when i was
picking up the shards or punch-through).

Mike
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, January 19, 2005 8:45 PM
Subject: Advice on Secondary


>Original poster: "Medina, Benjamin Alejandro (UMR-Student)"
<bamxbb@xxxxxxx>
>
>Hello,
>
>I am currently building a medium size Tesla Coil. Here are some of the
>specs:
>
>NST - 15kV/30ma
>
>Capacitor- 5.37 nF made from glass plates with heavy duty aluminum foil
>on the inside and outside faces
>
>Primary- 0.25" of flexible copper tubing
>
>Secondary- 22 AWG enamel magnetic wire on 4" diameter PVC. Height- ???
>
>I am thinking on 30". I've read that for a medium size Tesla Coil an
>aspect ratio of 4.5:1 up to 5:1 is recommended. But then again, there
>are no hard/fast rules.
>
>According to WinTesla, 4"x30" with 22A WG wire yields 1090.53 turns but
>the Aspect Ratio is 30/4 = 7.5. Would this be a problem?? At first we
>were going to go with 22" or 23" in height (22/4 = 5.5) (23/4 = 5.75)
>giving us around 800 turns, but I read that 1000-1400 turns tends to
>produce better performance than lesser turns.  The difference might be
>10-20% spark length.
>
>What do you recommend? Please advice. Your comments and suggestions
will
>be appreciated. Thank you.
>
>Sincerely,
>Ben Medina
>
>