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[Amps] L-7 Failure, HV fuses

Subject: [Amps] L-7 Failure, HV fuses
From: "Pat Barthelow" <>
Date: Sun, 16 Nov 2003 14:55:06 -0800
List-post: <>
Re HV fuses:

I have seen in the literature descriptions of a HV fuse made by inserting into the B+ line, a 30 guage Cu wire approx 2" long. suspended between two ceramic standoffs in the amp. Would that function as a near instantaneous HV fuse. protecting the tube in the event of a heavy current HV fault?
73, de Pat

From: "Jeffrey Madore" <K1LE@ARRL.NET>

Said: Snip... (except in the case of "current limiting fuses" which open and
quench the arc very fast, but are quite expensive.)
It would seem to me that a high voltage fuse located after the filter C, and
in series with an appropriate glitch R, would provide increased protection,
even more so if the filter C is large in capacity.   Is this reasonable /

Jeff - K1LE - CT ><>

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