Re: Filament help!

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

Original poster: "Chris Arnold" <chris_arnold-at-msn-dot-com> 

Jim,

Since your tube has a 5 V filament you should be able to use a computer psu 
pretty easily.  You'll just need to connect the tube between the red and 
black wires.  Usually red is +5, black is ground, yellow is +12, and purple 
is +5 V stand by.  Beyond that you'll have to do some digging to determine 
what to do with yours.  I've used both a Dell and a standard ATX power 
supply, and they had different colors.  If its a standard ATX connect the 
green wire to ground.  Regulation is generally pretty good on the +5 line, 
but if you want better connect the gray (or whatever is called power good) 
wire to the +5 side of your filament.  It serves as a remote sense lead for 
the 5 volt supply.  Beyond that, good luck.  I'm not sure if a computer PSU 
will appreciate being that close to a working tesla coil.....

Regards,

Chris Arnold


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Filament help!
>Date: Sat, 25 Oct 2003 21:03:18 -0600
>
>Original poster: "Jim Mitchell" <Wrenchead-at-starband-dot-net>
>
>I'm using a 4-125A in my VTTC, and I cant find a filament supply!  I was
>thinking of using a PC PSU but they have too many wires and I don't know
>which ones to cross for power on, and which to load to keep regulation
>proper.  The 4-125A needs 5v at 6.5A for the filament.  Also, any idea if
>thise tube is better than the 813? I have both and am wondering which I
>should use.