From: jl@glen--canyon.com   
      
   On Thu, 15 Jan 2026 15:18:31 +0000, liz@poppyrecords.invalid.invalid   
   (Liz Tuddenham) wrote:   
      
   >john larkin  wrote:   
   >   
   >> I need something like 1.5K resistance across a 750 volt pulse. Pulse   
   >> widths will be below 1 us.   
   >>   
   >> Three 1206's in series, 499r each, would work. Peak power dissipation   
   >> per resistor will be 125 watts at 250 volts. I think that's OK but I   
   >> want to test it.   
   >>   
   >> Here's the tester. The DUT (device under torture) will go across the   
   >> gap on the left.   
   >f   
   >> I have both regular thickfilm resistors and some thinfilms to test. I   
   >> theorize that the thinfilms will hold up better.   
   >   
   >Would a non-inductively-wound wirewound resistor work well enough?  You   
   >would have plenty of mass to average-out the pulse energy.   
      
   WWs are great for pulse overload, not so great for PCB density. The   
   best would be to use three (or two, or one) surface-mount 1206   
   thickfilm that we have in stock.   
      
   I could stand a micohenry or so parasitic inductance. The 1.5K will in   
   fact be in series with a small inductor.   
      
   I think testing parts is the only way to understand this.   
      
      
   John Larkin   
   Highland Tech Glen Canyon Design Center   
   Lunatic Fringe Electronics   
      
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