[Amps] Rectifier equilization?

[peter chadwick]

If they are off the same reel, you should be OK without resistors. 1N5408s are pretty slow, so I don't think you need capacitors, either. But an MOV on the transformer primary and step start are good for minimising  stress on everything.

I did work at a semiconductor company where they made diodes - nothing as small as a 1N5408 though, but diodes rated at 2000 amps and 1500 volts PIV. The guys there told me that devices from the same batch shouldn't need equalising resistors

73

Peter G3RZP


========================================
 Message Received: Sep 13 2013, 05:28 PM
 From: "Hardy Landskov" <n7rt at cox.net>
 To: amps at contesting.com
 Cc: 
 Subject: [Amps] Rectifier equilization?
 
 I have just rejoined the amp list after a few years and am wondering if the diode equalization question was ever resolved.
 I am building a new bridge HV PS and it uses 12 diodes per leg. Rich Measures says using a .01 & 470K across each diode is no longer needed due to improvements in semiconductor manf. processes.
 I have 100 1N5408's that came off the same reel so I feel they should be matched fairly close.
 I would like to hear a few opinions.
 Thanks
 73 Hardy N7RT
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