[Top] [All Lists]

[AMPS] SB-1000 mods?

To: <>
Subject: [AMPS] SB-1000 mods?
From: Mike" < (Mike)
Date: Sun, 9 Sep 2001 15:14:08 -0700
Looks like the RCD resistors will do the trick (the 20W parts should fit
nicely in the space available inside the L-7 PS). Thanks to Tom, Rich, Todd, 
Ian, Phil et al for the quick education on glitch circuit design.

73 de Mike, W4EF................

----- Original Message ----- 
From: "Tom Rauch" <>
To: <>; "Mike" <>
Sent: Saturday, September 08, 2001 12:35 PM
Subject: Re: [AMPS] SB-1000 mods?

> > glitch resistor? I have some 25 ohm/25 watt Dale RER type metal body
> > resistors, but I am concerned that they might be prone to flash over
> > due to the relatively small gap between the leads and the metal case.
> > Presumeably a ceramic body wire wound resistor is the way to go.
> > Should I be concerned about inductance (L*di/dt kick) - some
> > wirewounds seem to be classified as "non-inductive" whereas some
> > aren't?
> The resistor must be surge rated for the voltage across the resistor 
> and the peak energy.
> RCD makes xxx-P series pulse rated resistors, or you can use a 
> "glow-bar" type. The RCD pulse rated resistor barely costs more 
> than a conventional wire wound resistor.
> It makes no difference at all if it is inductive, because the 
> inductance will be negligible. Many non-inductive wire wound 
> resistors have a lower than normal voltage rating (from lead to 
> lead), because of the winding method.
> The metal case resistor won't work well.
> 73, Tom W8JI

FAQ on WWW:     
Administrative requests:

<Prev in Thread] Current Thread [Next in Thread>