VTTC

• To: tesla-at-pupman-dot-com
• Subject: VTTC
• From: "Herwig Roscher" <herwig.roscher-at-gmx.de> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Mon, 21 Feb 2000 12:38:50 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hello,

I'm planning on building a DC driven, CW operated VTTC. In 
contrast to spark gap excited systems, both, the primary and the 
secondary circuit, are parallel resonant circuits here. Therefore I'm 
assuming that the L/C ratio of the primary coil should be different 
from the "standard design". The turns ratio primary coil/secondary 
coil and the coupling factor between these coils are responsible for 
suiting the plate resistance to the discharges.

Up to now the planned system looks like this:
Primary circuit: C = 2 nF, form = 6", turns = 25, AWG = 12
Secondary circuit: Form = 3", turns = 900, AWG = 28, corona 
shield, some " apart
Grid coil: Form = 6", turns = 12, AWG = 22, distance from primary 
coil about 1"

Does this sound good?

Q: Terry found out, that the streamer load for disruptive systems is 
equal to 220 kOhms in series with about 2 pF per foot of streamer 
length. Does anyone know similar figures for the "brush" of CW 
systems?

Q: Are there any figures for the number of primary turns, the L/C 
ratio and the coupling to get me in the ballpark (in case, the a. m. 
concept is totally wrong)?

I know, there's a long way to go and would appreciate some help.

Regards		Herwig 

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