[Amps] inexpensive HV fuse

[k7rdx]

Marv...Can you direct me to a roadmap for this type of device?I have always 
used series resistance in the B+ of my YC-156 amps but lightning fast high 
voltage cutoff seems a much better solution for tube&component 
protection..73,Jim..K7RDX..
----- Original Message ----- 
From: "Radio WC6W" <wc6w_amps at yahoo.com>
To: <dezrat1242 at yahoo.com>; <amps at contesting.com>
Sent: Thursday, July 23, 2009 8:41 AM
Subject: Re: [Amps] inexpensive HV fuse



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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>



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