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Old 04-09-2012, 11:55 PM
Ron Chase Ron Chase is offline
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Join Date: Aug 2010
Posts: 57
Quote:
Originally Posted by minoly View Post
When I hook up my K08A's that way, they just cascade over - no build up then dump - only energy over like a waterfall Of course I did it both ways right out of the box, even tried it on the input - no go for mine.
I'm glad yours work.
Patrick
Patrick, it sounds like your K08A is working just not the way you think it should. Here is part of an email I Brent:

"Brent,

Here it is. Because of all the talk over the years about large spikes hitting the negative pole of the battery, Iíve been thinking that if I donít see a big spike or voltage change at the capacitor then itís not working. In reality there are big spikes going into the cap but they are absorbed by the cap and then transferred to the battery through the SSR and only show up as pulses of current flow through the analog meter. The charging is there but if you look at the cap dump voltage you will only see very small increments of change at each trigger. Just tweak your machine to get as high a current pulse at the meter and it will charge fine."

Patrick, what I found with my NE2 cap dump circuit was that the circuit was dumping at 70-75V down to about 60V and disappating lots of heat through the FETS. But it only charged slightly better than the simple SSR circuit, just wasted a lot of energy as heat. Your analogy of the water cascading is good but apparently thats all it takes with the larger Ferris Wheels. JB did say to build big!

I know its not what we expected but nevertheless it works. Maybe it just works better on the big wheels.

Ron
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