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[AMPS] Diodes

To: <amps@contesting.com>
Subject: [AMPS] Diodes
From: W8JI@contesting.com (Tom Rauch)
Date: Thu, 29 Jul 1999 11:53:16 -0400
I think my message bounced. 

Marv says that recovery time isn't important, based on the slow 
slew rate of powerline frequencies.

What then makes sure the diodes all share equal voltages while 
turing off? If it is junction capacitance, you are in trouble. The 
capacitance is not only not matched, it changes with reverse 
voltage. The lowest capacitance diode will turn off quickest, and 
that will lower capacitance even more in that diode compared to 
higher capacitance (slower) diodes.

Reverse leakage current, unless you take the diode to the 
threshold, is extremely low. Are people claiming one diode goes to 
threshold and then the others start being forced to threshold as 
that single diode avalanches? Is that the mechanism that causes 
voltages to be "shared"?


73, Tom W8JI
w8ji@contesting.com

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