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[AMPS] glitch resistors

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Subject: [AMPS] glitch resistors
From: (Tom Rauch)
Date: Sat, 8 Sep 2001 08:48:14 -0400

> Why are the most of you talking of HV resistors   ????  Be  realistic
> and think that this is to avoid the current during arc.
> I Always put those current limiting devices at the LOW voltage
> potential.

That's not a solution I'm afraid.

When you have an arc, the resistor MUST be able to handle the full 
supply voltage across the terminals of the resistor no matter where 
it is located in the path.

That is why you always need a suitable HV resistor, even if you 
place it in the negative rail....which is a terrible place to put it 
anyway because it is bypassed by all the stray C in the power 
supply and requires the negative rail to lift to supply potential in 
order to limit current!

There is no easy way out. You need a HV rated resistor, and it 
must be in the high tension to chassis lead from the supply.
73, Tom W8JI 

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