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[Amps] Grid fuses (was: Life and gain of 3-500Z)

To: <amps@contesting.com>
Subject: [Amps] Grid fuses (was: Life and gain of 3-500Z)
From: Bill Turner <dezrat@copper.net>
Reply-to: noway@nohow.com
Date: Wed, 19 Jul 2006 08:29:35 -0700
List-post: <mailto:amps@contesting.com>
ORIGINAL MESSAGE:

On Tue, 18 Jul 2006 18:57:55 -0700, you wrote:


>> What is the fusing current rating of the resistor? Why would
>> you fuse a grid?
>
>Because 0.25w carbon-film resistors cost less than 3-500s.

------------ REPLY SEPARATOR ------------

I'm a bit late getting into this discussion, but my curiosity has been
aroused.

Two questions:

1. Why not use a real fuse? There are some micro-miniature fast blow
fuses available which would not add much lead inductance, if that is a
consideration.

2. If the fuse blows, you wouldn't want the grid to be floating I'd
think. Do you parallel the fuse with a high value resistor to maintain
DC continuity?

Bill, W6WRT
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