RE: OLTC update

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

HI Gary

At 08:48 AM 8/14/2002 -0400, "Lau, Gary" wrote:
>Hi Terry:
>
>I noticed that contrary to the practice with spark gap coils, you are 
>placing the power supply across the tank cap, rather than the "gap".  This 
>places a more difficult burden on the filter network between the tank and 
>the power supply, to keep the RF out of your mains.  Have you examined the 
>signals going back to the mains?  I see the obvious problem with placing the 
>power supply across the gap - a turn-on fault will short out the power 
>supply and smoke will flow...  Maybe a lower current IGBT could be placed in 
>series with the PS, breaking the connection whenever the main gap IGBT's are 
>told to turn on?

Since I quench the coil fairly soon and the 75mH inductors and caps are
such powerful filters anyway, it really does not matter at all.  If you go
across the caps, or across the opened gap, it's all pretty much the same.
Of course, the "noise" problems are far far less in this case anyway.

>
>Also, with the distributed tank cap/IGBT concept, I assume you plan to have 
>a separate decoupling network/filter for each segment?

Since the primary system impedance is very low, it probably only takes like
a 1 ohm resistor to "isolate" each cap.  Need to look into this today.

========
From: "Daniel Hess" 
>
>Terry;
>
>OLTC ???
>
>Daniel

Off-Line Tesla Coil

See:

http://hot-streamer-dot-com/OLTC/

===============

Cheers,

	Terry