RE: Dan's DRSSTC II 1st light tips?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi,

I try to make primary caps and easily touchable things discharge in 5 
seconds  (5RC = 5).  It is real nice when a friendly helper moving your 
stuff is fondling the primary cap terminals to know that there is not 
voltage left there ;-))

Internal buss stuff is like 2 or 3 minutes based on how long it take a 
statistically averaged fool to remove the cover screws and go touching 
everything inside...

Test technicians and those that play with circuits live, are just "on their 
own" to "know better"...  "Hand" discharge resistors are cute, but I have 
seen too many flaming resistors thrown across the floor in terror when 
someone tries to discharge the still fully energized buss...  I just used a 
screwdriver, but I don't think that is politically correct now ;-))  But 
they were very effective...

I put discharge resistors on "every" dangerous cap.  No reason at all not 
too...  Base the discharge time on how long it take to go grabbing it...  I 
have a buss switch that either charges the caps up hard, or discharges them 
hard, with a 50 ohm resistor.  Either you are running the coil, or you are 
running away ;-))  No in between...

http://drsstc.com/~terrell/schematics/Chassis.gif

Cheers,

        Terry


At 05:04 PM 7/8/2005, you wrote:
> Hi Dan,
>
> I chose 10k because that was the value in the book!
> I'm not really concerned about discharging "as fast as possible".
> I just don't want to go back to the coil after dinner or whatever and
> forget the H-bridge is still sitting at 200 volts or so!
>
> Thanks!
>
> Marc
>
>
> > [Original Message]
> > From: Tesla list <tesla@xxxxxxxxxx>
> > To: <tesla@xxxxxxxxxx>
> > Date: 7/8/2005 12:34:54 PM
> > Subject: RE: Dan's DRSSTC II 1st light tips?
> >
> > Original poster: "Mccauley, Daniel H" <daniel.h.mccauley@xxxxxxxx>
> >
> > Just saw this.
> > Anyways, the 10k resistor isn't going to discharge fast enough to be of
> > real use.
> > Its better to use a relay (or similar) and a smaller resistance resistor
> > to
> > really discharge as fast as possible.
> >
> > Dan
> >
> >