On 1/7/2011 7:02 PM, Jim Thomson wrote:
> Date: Fri, 7 Jan 2011 10:45:07 -0500
> From: "Carl"<km1h@jeremy.mv.com>
> Subject: Re: [Amps] Fuses
>
> Just dont over fuse. The usual 1200W out amp uses 10-12A; 15A for
> 1500-2200W, etc at 240VAC.
I thought that was how we were supposed to find the fault. Increase the
fuse size step by step until the problem either blows up of catches
fire. Of course it may take something expensive along with it. <:-)) Do
I need to add a disclaimer even after the smiley?
73
Roger (K8RI)
> Carl
> KM1H
>
> ## why didn't they just get off the..'get cheap program' and use a fast
> breaker ??
> Ideally, a 2 x pole, 15A , controlled magnetic hydraulic breaker would be
> the 1st choice,
> one with an..."instant trip" . The instant trip types are the fastest.
> They just remove the oil
> from the reservoir, so it's super fast. The normal, slow, and motor start
> types just use different grades
> of viscosity for the oil used. I use em all the time for my various HB
> projects. Any HB B+ supply
> always gets a super fast magnetic hydraulic breaker..for the primary of the
> plate xfmr. [they are also NOT
> affected by ambient temp either].
>
> ## My Drake L4PS power supplies use 2 x 15A breakers, spaced a few inch's
> apart. One per hot leg.
> These are the simple push button type. [ push to re-set]. The advantage
> of the 2 x pole type noted above is..
> the trip bar between em ensures both sides of the 240 line open up.
>
> ## You would think for the megabuck that alpha charges for their amps, that
> they would not cheap out..and use
> simple fuses !
>
> Later... Jim VE7RF
>
>
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