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Re: [TCML] Kick back voltage

I actually got this running just fine using the new supply and there is no flashing or arcing inside during a discharge. I ran it for 15 minutes without any issue.

there is one problem - it just isnt very powerful. In triboelectric mode it easily outperforms the pumped mode by double.

im running at only 5VDC but there is a nice hiss and corona from the lower brush and no arc overs. It just doesnt reach the voltage and power output at all :(


----- Reply message -----
From: "David Speck" <Dave@xxxxxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Subject: [TCML] Kick back voltage
Date: Mon, Oct 5, 2015 6:13 PM

No, Matt,

You want an ordinary 1N4007 silicon diode reversed biased across the 
output.  The forward voltage across MWO diodes is in the range of 35 to 
50 volts, which wouldn't give the power supply much protection.

However, such a diode won't protect against transients relative to 
ground.  Some combination of resistors and capacitors might give a bit 
of protection, but in the long run, lead acid batteries are your best bet.

Switch mode supplies are delicate creatures, unsuited to the sort of 
application you are proposing.  You need a good old vacuum tube supply.  
That would tolerate massive transients better than anything made of silicon.


On 10/5/2015 6:29 PM, msweeney23@xxxxxxxxx wrote:
> I got a new 5V DC 20amp switching supply. If i put a 12KV (or 2) oven diode backwards across the +/- will that give me some spike protection?
> I went to my local ax man today someone sold them a tesla coil but they wouldnt sell it to me :(
> Thanks for any suggestions.
> Matt

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