[Milsurplus] [ARC5] Followup: HV Fuse in BC-375

[arc5 at ix.netcom.com]

I have now opened five fuses in this configuration. All have been uneventful and entirely as expected.  I value my 375 highly and I am comfortable in my results.  it may help to remember that Littlefuse et al are in the business of selling $12 HV fuses....  
D.S.

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------Original Message------
From: J. Forster <jfor at quikus.com>
To: <w7ksg at q.com>,"J. Forster" <jfor at quikus.com>
Cc: <milsurplus at mailman.qth.net>
Date: Saturday, October 8, 2011 2:34:16 PM GMT-7
Subject: Re: [Milsurplus] [ARC5] Followup: HV Fuse in BC-375

I agree. Interrupting HV DC, especially with inductance in the circuit,
causes sustained, destructive arcs.

-John

=============


>
> For all of your hard work you have no protection to your circuits.  You
> might not have had any problems so far but it is going to end up biting
> you in the rear end.  Go to the Littlefuse or any other fuse web site and
> look at their fuse specs.  When you place a 250V fuse in a HV line you
> have absolutely no protection.  The fuse is designed to MELT the fuse
> element.  When the fuse
> is subjected to a HV the fuse element ionizes and that ionized gas is
> conductive which means that whatever you are trying to protect is
> destroyed. You are spending twenty five cents to
> protect a several hundred or more piece of equipment. It just doesn't make
> any sense.
>
> So your anology of
>
> LookFineLassaLongTime
> PaintItGrayandDon'tMessWidIt
>
> might mean
>
> What protected me didn't cost a dime
> Should have listened to them all but didn't have the time.
>
> J
> W7KSG
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