[Amps] Spike Caps

[Will Matney]

Rich,

Your correct! I figured the diodes you were using were series strings as most use. You would need to use something similar to what you have. Good practice is to use a capacitor with a voltage rating of at least 1-1/2 to 2 times the operating voltage if possible.

Best,

Will

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On 9/3/05 at 9:35 PM Rich wrote:
 
Hi Will,
I did not make my self clear, I only have 4 diodes in the set up , in a bridge and that way there is full PIV voltage across each rectifier. I do not know it they would help but a 
1.5-2Kv would not work with up to 4200v ac being able to be sent to the bridge.
 
From: "Will Matney" <craxd1 at verizon.net>
Subject: Re: [Amps] Spike Caps
To: amps at contesting.com
Message-ID: <200509031414110800.00B4505D at outgoing.verizon.net>
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Rich,
 
You wouldn't need 10 kV capacitors there as the HV is divided equally across the rectifiers. If there's say 1 kV across each, you can use a 1.5-2 kV ceramic disc capacitor say at .01 uF (10,000 pF). You dont need any so-called "balancing resistors" as they can cause more harm than good to the rectifiers. Hope this helps.
 
Best,
 
Will
 
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On 9/3/05 at 12:25 PM Rich wrote:
 
>My power supply is about complete, did a test run to 3200v DC, and no
>problem. It should be good for 4500+ @1amp.
>My question is that I have HV diodes blocks, ECG-548's and would it do
>any good (or harm) to put a 10Kv .001 disk ceramic on each one for spike
>suppression? I already have the caps.
> 
>            Rich, kd0zz