[Elecraft] Polyfuse for KX3 external battery

[Don Wilhelm]

Brent,

I recommend fusing *any* battery cable near the battery (or power 
supply) with a fast-blow fuse whose rating is matched to the size of the 
wire.  #10, 30 or 35 amps, #12, 20 or 25 amps, #14 15 or 20 amps, #16 or 
#18 10 amps.  I like the in-line ATC fuses or use a rigrunner or other 
fused DC distribution box.

If a short at the cable plug occurs the fuse will blow and protect the 
wire from making molten metal and possibly fire.

That fuse is not intended to protect the equipment.  Most equipment (the 
KX3 included) has internal protection for overcurrent.

73,
Don W3FPR

On 8/13/2013 2:43 PM, KD0GLS wrote:
> Wondering if anyone here has made use of a polyfuse between an external SLA battery and a KX3.  I'm interested in your experiences with these devices and in any specific hold and/or trip current values you've tried and had good (or bad) luck with.
>
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