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



Original poster: "Daniel McCauley" <dhmccauley@xxxxxxxxxxxxxxxxxxxxxxxxxx>

Just remember, if you lower it, its going to have to be big to dissipate all
that power.

Dan


> Point taken - I'll reconsider lowering the 10k resistor for a faster > discharge. > > Thanks much > > Marc > > > > [Original Message] > > From: Tesla list <tesla@xxxxxxxxxx> > > To: <tesla@xxxxxxxxxx> > > Date: 7/8/2005 9:13:15 PM > > Subject: RE: Dan's DRSSTC II 1st light tips? > > > > 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 > > > > > > > > > > > > > >