[Elecraft] K3 100W recommended fusing

Fred Jensen k6dgw at foothill.net
Wed Dec 9 21:56:42 EST 2015


TYPE:  The automotive flat inline-blade type seem to be best [RigRunner 
uses them].  Very large [relative to other designs] contact area, very 
strong wiping-action on insertion and removal.  Not gas-tight, I pull 
and reinsert mine every now and then, when I think about it.

RATING:  Since we're fusing the primary power, I think the old ROT [rule 
of thumb] has been 125-150% of the likely normal maximum load current. 
That of course depends on the configuration of the K3.  My K3/100 has 
been fused at 25A for years.  That's close to 150% of key-down.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

On 12/9/2015 4:00 PM, Chris Kimball wrote:
> I hoping to buy a 100W version of the K3 next year.  I note recommendation
> that the rig be fused on both sides of the 12 V supply line.  What is the
> recommended fuse type and rating for this application?



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