[Elecraft] In Line Power Pole Fuses

[Don Wilhelm]

Dave and all,

Placing the fuse near the power supply end is the way to do it.
In the event of a short, the power wire can spew metal and start a fire.
Always fuse near the power supply.  A fuse at the equipment end will 
only protect the equipment, but will expose the wire from the power 
supply to hazards.

73,
Don W3FPR

On 7/21/2021 10:43 PM, Dave wrote:
> Hi,
>
> I am unsure what you are asking...  If you are asking about fuse 
> values, I select values a bit above the max peak current I expect.  
> For my K3 I use a 30 amp fuse.
>
> If you are asking about voltage drop, and want to know what the K3 
> sees, there is a built in volt meter in the K3, (see the manual), 
> which will show you the voltage at the K3, after all your fusing, and 
> wiring.
>
> I always take my voltage readings at full output.  I try and stay 
> within the limits Elecraft sets for voltage.  If I am running low 
> voltage on transmit, I goose the power supply slightly, staying below 
> the max voltage rating Elecraft recommends when not transmitting at 
> full power.
>
> The fuse(s) is/are probably not going to protect my radio-- if 
> something happens, (i.e., current draw in excess of 30 amps), the 
> radio is probably already broken.
>
> I use the fuse to reduce runaway thermal effects, (read that as fire), 
> on my power supply wiring in the event of a short to ground.  I place 
> the fuse(s) as close to the power supply as my wiring will allow.
>