[Amps] Tokyo High Power HL350VDX fuses / confusion

David Gow 6146guy at gmail.com
Sat Mar 26 23:08:23 EDT 2022


Read the reviews.  All say 300 watts output.  Looks like an error in the
manual.  50 amp fuse seems reasonable.

On Sat, Mar 26, 2022 at 7:22 PM Artek Manuals <Manuals at artekmanuals.com>
wrote:

> A friend of mine recently acquired a Tokyo High Power HL350VDX /2M/ 300W
> amp
>
> Some things in manual  and in practice don't add up
>
> 1) The manual shows two 20 amp fuses, one in the positive line and one
> in the negative line
> 2) the amp is advertised as 300W amp but in the manual it says it will
> need 42A at 250 W out and no mention of what the typical draw at 300W
> would be but I am guessing around 50A. The two 20amp fuses obviously
> wont survive that and indeed somewhere around 150W out the amp does blow
> the 20A fuses.
>
> so I guess my questions are
> 1) IS this really a 300W amp or just 100W?
> 2) If it is a 300W watt amp how big a fuse does it really need 50A?
> 3) is the "42A @ 250W" a typo? and it really only draws say 22A @250W (
> and there is a fault in this particular amp that causes it blow 20A
> fuses) ?
> 4)250W out @42A would be about 44% efficiency of a 13.8 volt supply
> seems reasonable so what size fuses? 50A?
>
> Dave
> NR1DX
>
>
> --
> Dave Manuals at ArtekManuals.com www.ArtekManuals.com
>
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