RE: [TCML] C D capacitors

[William Noble <william_b_noble@xxxxxxx>]

from memory, the capacitirs that I was selling cheap were Panasonic ECQ-E, marked 225, 1250VAC - anyway, though that batch is long gone, my point is that I was making profit (actually really good profit) selling them at 5 cents each and later at 25 cents each - there are deals like I stumbled into all the time - as I recall I ended up with 4000 of them - maybe it was 40,000? - filled the back seat and trunk of a 76 Cadillac with bags of capacitors and I think I paid under $100 - so you need to be in the right place at the right time and be on the lookout for deals and flexible.
 
> Date: Tue, 6 Apr 2010 10:29:35 -0700
> Subject: Re: [TCML] C D capacitors
> From: henry@xxxxxxxxxxxxxxxx
> To: tesla@xxxxxxxxxx
> 
> Inductance and resistance of that many solder joints is non-negligible.
> 
> On Mon, Apr 5, 2010 at 11:27 PM, Christopher Karr
> <chriskarr4@xxxxxxxxxxx> wrote:
> >
> > Well, if the capacitors can easily handle one-hundredth the pulse-current and cost five cents apiece at the same voltage and one-hundredth the capacitance, they are cheaper than a single 942C20P15K-F (yes, I have the part-number memorized and know what each portion of it represents...) and have even better characteristics for the same price (this is, of course, assuming that one isn't making a bulk-purchase of the 942's).
> >
> > Now, the labour involved in assembling one-hundred capacitors to make the equivalent of one CDE cap (plus the cost of solder) is another story all-together.
> >
> > If you're like me and enjoy both, saving money and soldering, it's a win on both accounts. The only losing portion of such a situation is the size which this array would require, due to its having a poor volume:capacitance ratio. The majority of it would, likely, be HV insulation which isn't the dielectric.
> >
> > Happy coiling,
> >
> >  - Christopher Karr
> >
> >> Date: Sun, 4 Apr 2010 10:31:44 -0400
> >> Subject: Re: [TCML] C D capacitors
> >> From: glau1024@xxxxxxxxx
> >> To: tesla@xxxxxxxxxx
> >>
> >> I don't think it's correct to suggest that specifying the right
> >> dielectric is all one needs to get a useful cap.  True, the dielectric
> >> should be polypropylene, but eBay is full of HV polypropylene caps
> >> that are not suitable for TC use.  The other critical thing is how the
> >> cap is built - whether the plate terminations will support the very
> >> high pulse currents encountered in a TC.  This is not a point that we
> >> can be flexible on.
> >>
> >> Regards, Gary Lau
> >> MA, USA
> >>
> >> On Sat, Apr 3, 2010 at 5:17 PM, Bill Noble <william_b_noble@xxxxxxx> wrote:
> >> > they are long gone now, but I was selling similar caps for $5 cents each a
> >> > few years ago - I'll bet if you look around you can find them or something
> >> > suitable in quantity pretty cheap - try ford electronics, for example
> >> > (telephone, and ask for scott) - be flexible on what you want - you need
> >> > quantity and the right dielectric - beyond that, everything else can be
> >> > adjusted -
> >> >
> >> > --------------------------------------------------
> >> > From: "robert massa" <massahbob@xxxxxxxxxxxxx>
> >> > Sent: Saturday, April 03, 2010 8:40 AM
> >> > To: <tesla@xxxxxxxxxx>
> >> > Subject: [TCML] C D capacitors
> >> >
> >> >>     Can anyone advise me about where to buy some cornell dubilier 942
> >> >> capacitors that everyone is using for mmc's.  Checked a couple online sites
> >> >> and  $6.50 seems high, but I am new to this and don't know.  The salt water
> >> >> caps work, but...!
> >> >>  The info I,ve gleaned from this site is priceless.
> >> >>
> >> >> Thanks, Bob
> >> >>
> >> >> _______________________________________________
> >> >> Tesla mailing list
> >> >> Tesla@xxxxxxxxxx
> >> >> http://www.pupman.com/mailman/listinfo/tesla
> >> >>
> >> > _______________________________________________
> >> > Tesla mailing list
> >> > Tesla@xxxxxxxxxx
> >> > http://www.pupman.com/mailman/listinfo/tesla
> >> >
> >> _______________________________________________
> >> Tesla mailing list
> >> Tesla@xxxxxxxxxx
> >> http://www.pupman.com/mailman/listinfo/tesla
> >
> > _________________________________________________________________
> > Hotmail is redefining busy with tools for the New Busy. Get more from your inbox.
> > http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_2_______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
> 
> 
> 
> -- 
> Henry Hallam
> 
> Sent from my Laptop
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
 		 	   		  _______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla