Re: The MMC debate continues . . . . . .

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "M G" <gt4awd@xxxxxxxxx>


The resistors do more than discharge the capacitors after use. 
Resistors across the capacitors help to evenly distrubute the 
electricity across each capacitor. In a MMC setup where the 
capacitors are rated below the voltage that is used the resistors 
would help to prevent any capacitor failures from overvoltage. A MMC 
setup using capacitors rated above the used voltage would see no 
benefit other than safe discharging after use.



Matt G.
---------[ Received Mail Content ]----------
Subject : Re: The MMC debate continues . . . . . .
Date : Mon, 19 Feb 2007 17:12:47 -0700
From : "Tesla list" <tesla@xxxxxxxxxx>
To : tesla@xxxxxxxxxx

Original poster: "Barton B. Anderson"

Well, I just had to weigh in on this one.

AC or DC, bad experience or not, it doesn't matter. In the event the
load is disconnected due to a failure or whatever at the wrong time,
it is possible to sustain a substantial charge on the cap or cap bank
(MMC included). I did have a situation and got a nasty bite! It
hurts! I remember how angry I was with myself because I knew I should
have installed bleeders. But, I had previously run so long without
even a sneeze that I simply didn't bother myself with it. After the
incident, I do. Funny how one can change their views so quickly.

Bleeders (or other discharge schemes) are no different than green
wire safety ground. It's there to prevent injury in the event
something unforeseen occurs. People will choose to do cap discharging
a number of ways; I prefer bleeders and I also doublecheck with a
shorting bar (all coils, little or big).

Take care,
Bart

Tesla list wrote:

>Original poster: Edward Wingate
>
>DC,
>
>No bad experiences. The caps just need to be discharged after a run.
>
>Ed Wingate
>
>>Original poster: "resonance"
>>
>>
>>
>>I have played with AC powered TCs for nearly 45 years now and I
>>have never ever had a shock from a small, medium, or large TC that
>>runs on AC. I recall Ed Wingate has issued warnings where he has
>>had bad experiences with dual cap "equi-drive" systems, but I have
>>not used this type of drive so really can't comment on it.
>>
>>
>>
>>Best to error on the side of caution if you have any doubts.
>>
>>I would suggest using a small ground probe with an NE-2 neon bult
>>to "test" the caps and check them after use in your particular coil
>>design. If after dozens of operations, and no stored charge found,
>>I think it would be safe to discontinue such tests.
>>
>>Be safe!
>>
>>Dr. Resonance
>>
>>>Dr. R- as I recall you told me once that you don't use bleeders on
>>>MMC banks and they aren't necessary. Have you changed your view
>>>or does this just apply to VTTC coils?
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
>
>
>







----------
<http://cinema.lycos.com/?if_Event=mail>Free Movies 100's of Free 
Feature Length Films - Meet Friends, Watch Movies & Win!