[Amps] inexpensive HV fuse

[Radio WC6W]

Hi Bill,
  The device I've proposed is located in the plate supply line between the PS filter caps and the tube.

  It is NOT on the primary side of the supply.

73 & Good morning,
  Marv WC6W 

http://wc6w.50webs.com/

--- On Thu, 7/23/09, Bill, W6WRT <dezrat1242 at yahoo.com> wrote:

> From: Bill, W6WRT <dezrat1242 at yahoo.com>
> Subject: Re: [Amps] inexpensive HV fuse
> To: amps at contesting.com
> Date: Thursday, July 23, 2009, 8:37 AM
> ORIGINAL MESSAGE:
> 
> On Thu, 23 Jul 2009 08:24:24 -0700 (PDT), Radio WC6W <wc6w_amps at yahoo.com>
> wrote:
> 
> >
> >  Damage is avoided by shutting off the power,
> veryyyy quickly, rather than by shunting it.
> >
> 
> REPLY:
> 
> Nothing wrong with shutting off the PS quickly, but if you
> leave the filter caps
> charged, any damage from the B+ arc will involve much more
> energy than if the B+
> line were opened by a fuse and/or limited by a glitch
> resistor and/or crowbarred
> to ground. 
> 
> In other words, the quick shut-off should not be the only
> protection device. 
> 
> 73, Bill W6WRT
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