Re: Diode current discharges anyone want to measure?

Chop, chop, hack, hack....as was pointed out, there is a residual charge
stored in the diodes, and this charge when shorted to ground is what has
the potential to destroy the diodes, it's all over in a nanosecond
anyways...it does not really seem to be an issue with colour sets, but the
older B&W seem to loose a lot of diodes and this is the best explanation I
have heard to account for it, and a simple, easy cure. So why not take the
brief bit time and protect the diodes, unless you have an endless supply of
them...

John :-#)#

At 07:42 AM 4/25/2000 , James Nelson wrote:
>There is something I hadn't considered: Most of the capacitance is in the
>tube, not the "power supply".
>When we discharge a tube, we are discharging just that the tube, not through
>the diode. Now, the power supply may have a little tiny bit of capacitance
>on the output which is in series with a diode. Someone should measure this.
>The discharge current through the diode is therefore much, much less than
>the total discharge current. This is most likely why the diodes don't blow
>out all the time when we discharge our monitors.
>
>Using a resistor is still probably a good idea, but we probably don't need
>to be paranoid about it.
>Feel free to hachet my statements if need be.
>
>:-) James
>
>---------------------------------------------------------------------------
>** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
>** message body to vectorlist-request@synthcom.com. Please direct other
>** questions, comments, or problems to neil@synthcom.com.

  John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
  Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
  http://www.flippers.com
         "Old pinballers never die, they just flip out."

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.
Received on Tue Apr 25 13:23:08 2000