Re: [TCML] Let's try this again... - was: [TCML] MMC pics

[piranha <piranha@xxxxxxxxxx>]

I have "only" recommended this exact part:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=10MH-ND

Long tested and proven...  I fear that 1/4W resistors will either burn 
up or arc over...

I used to send them totally free to any and all that asked...  But I 
don't even know if I have any here these days ?:)

But Bart's advise to put two in series per cap works very well!!!

Terry


bartb wrote:
> Henry may be right here. Are those 1/4W resistors? They may have a 
> problem if they are. Expect about 1000V across each resistor if a 9kV 
> NST. Their probably right on the edge where they may work for a while, 
> but don't be surprised if they do burn at some point. You may want to 
> series 2 resistors per cap to be safe if you have them around.
>
> Take care,
> Bart
>
> Henry Hallam wrote:
> > Capacitors look okay.  Resistors are going to catch fire.
> >
> > On Sun, Jul 13, 2008 at 4:01 PM, Troy Peterson 
> > <troypeterson@xxxxxxxxxx> wrote:
> >  
> > > Last time I looked Electronics Goldmine (www.goldmine-elec.com) had 
> > > some
> > > high voltage resistors available. I picked up some 18meg, 4kv 
> > > resistors, but
> > > I haven't used them yet. Actual high voltage resistors may not 
> > > really offer
> > > much in this application other than a physically larger distance 
> > > between
> > > leads for voltage standoff... Not sure if that's worth the expense.
> > >
> > > Troy.
> > >
> > > Antonio Carlos M. de Queiroz wrote:
> > >    
> > > > Nicholas J. Goble wrote:
> > > >      
> > > > > Today I made a new MMC.  I took apart the old one and straightened 
> > > > > all
> > > > > the leads the best I could.  I then found an unused cutting board 
> > > > > (it's
> > > > > blue, I hope that doesn't matter) in my kitchen and used it to 
> > > > > mount the
> > > > > caps.  I drilled holes in the board and cut it lengthwise to make 
> > > > > two long,
> > > > > narrow boards (it's tough to cut the plastic with a jigsaw; it 
> > > > > melts behind
> > > > > the blade).  I used too much solder than I wanted to, the leads 
> > > > > weren't
> > > > > clean.
> > > > >
> > > > > I made two boards of six caps.  The caps are in series with the 
> > > > > resistors
> > > > > parallel.  Pictures submitted for approval.
> > > > >
> > > > > http://www.flickr.com/photos/28523883@N06/2662861930/in/photostream/
> > > > > http://www.flickr.com/photos/28523883@N06/2662862400/
> > > > >
> > > > > What do you think?  Are they Tesla worthy??
> > > > >         
> > > > Now they look ok. I would prefer physically larger resistors, or 
> > > > several
> > > > in series, but these probably will work.
> > > > To cut plastic with a jigsaw, apply some oil to the blade. Cuts like
> > > > butter then.
> > > >
> > > > Antonio Carlos M. de Queiroz

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