Re: how do you mount a variac?

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

Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>


Wow Terry.  I thought my living room looked bad.  My wife would kill me if I
had that much tesla coil stuff in our living room!  ;)

Dan




 > Hi Adam,
 >
 > Variacs at 1kVA and above should have like three/four big hefty bolt holes
 > to mount to a front panel.  Note my control box at:
 >
 > http://hot-streamer-dot-com/temp/NSTva_html_mfa757e7.jpg
 >
 > has four bolts around the big black knob for mounting.  Here is a big raw
 > wild variac found sill on the hoof:
 >
 > http://hot-streamer-dot-com/temp/P1150050.jpg
 >
 > Note the three bolts on the face (one removed) that even have rubber
 > washers on them.
 >
 >
 > If a 10 meg ohm resistor has 1000 volts RMS across it (worst case), we are
 > talking less than 1/10th watt.  So, say 50 resistors are 5 watts.  Might
as
 > well be zero...  The bleed resistors are a trivially small percent of a
 > coil's power loss.  that loss is constant as long as the power is on.
They
 > just drain the thing down once the power is removed.  Without bleeder
 > resistors, the voltage stays high for weeks!!!  Five seconds of drain time
 > is not a factor when the cap charges at 1/120th of a second normally.
 >
 > Cheers,
 >
 >          Terry
 >
 >
 >
 > At 08:48 PM 1/15/2003 -0500, you wrote:
 > >I am in the process of building my control box for my coil and I can't
 > >figure out how to mount the coil on to my box. I have seen people's
 > >variacs that are just hanging there, but their are no bolts on the other
 > >side... Also, on a slightly random note, when you turn off the power to
 > >your caps, how much heat do the bleeder resistors give off?
 > >Thanks
 > >Adam
 >
 >
 >
 >
 >