RE: NST protection

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

Original poster: "Basura, Brian by way of Terry Fritz <twftesla-at-qwest-dot-net>" <brian.basura-at-unistudios-dot-com>

Justin,

Why not use the proven RC filter Terry developed?

http://hot-streamer-dot-com/TeslaCoils/Misc/Filter.jpg
http://hot-streamer-dot-com/TeslaCoils/MyPapers/rcfilter/rcfilter.html


Regards,
Brian B.

 -----Original Message-----
From: 	Tesla list [mailto:tesla-at-pupman-dot-com] 
Sent:	Thursday, August 16, 2001 6:55 AM
To:	tesla-at-pupman-dot-com
Subject:	NST protection

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Cydesho-at-aol-dot-com>

Well, I burned out another one of my 15kV 60mA NST's today. That's the
second 
one, and I've only got one left. After the cursing stopped, I got to 
thinking. After I while, I came across an idea for protecting NST's. I don't

know if it will work, but I'll ask you guys and see what you think. A couple

of days ago, I was asking about using microwave oven caps as a tesla tank 
capacitor. Everyone that responded told me that they won't work because they

are lossy at RF frequencies. They are intended for use at about 60 Hz. So 
here's the idea: Why not place lossy type capacitors between the tesla tank 
circuit and the NST. I'm not an electronics expert, so someone would have to

come up with a proper setup. The 60Hz coming off the NST would pass through 
the caps without any problem, but any RFI coming back through the circuit 
would be turned into heat before it could damage the NST. Of course some 
other type of capacitor could be used beside microwave oven caps, which
would 
be quite bulky. I have no idea if this will work, but I thought I might as 
well throw it out there. I'd like to know what some of you guys out there 
think.
                                Justin