Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hplabs!hpfcso!hpldola!hp-lsd!dag
From: dag@hp-lsd.COS.HP.COM (David Geiser)
Newsgroups: sci.electronics
Subject: Re: Lightning protection
Message-ID: <7600025@hp-lsd.COS.HP.COM>
Date: 27 Sep 89 18:20:35 GMT
References: <11561@burdvax.PRC.Unisys.COM>
Organization: HP Logic Systems Division - ColoSpgs, CO
Lines: 24

In hp-lsd:sci.electronics, bam@PRC.Unisys.COM writes:
b>
b>The first time it got nailed, the pulse also took out the surge
b>protector.  I discovered (too late) that surge protectors can only
b>deal with the first 200-300 volts of a spike. I didn't bother
b>buying another one.

   Cheap ones, yes.  I've seen used better ones.

b>Could I rig up something with BIG caps to absorb the energy
b>before it does damage (assuming BIG caps are cheaper than preamps)

  I would guess you're talking about using a cap to filter HF noise
  on the power line to ground?  
  Use small caps.  Ten in parallel are more effective than
  one ten times as big.

You might consider a ferro-resonant power conditioner such as is
sold for computer equipment.


dag
"You pay for what you get.  
Sometimes, you get what you pay for."