[Elecraft] new owner looking for fuses.

[john at kk9a.com]

I did not state the fuse current rating is dependent on the voltage, only that you will need much higher amperage fuses (according to Georg Ohm) if you changed the wiring of a 240v amp to 120v.

 

John KK9A

 

From: Vic Rosenthal [mailto:k2vco.vic at gmail.com] 
Sent: Sunday, July 15, 2018 12:58 AM
To: john at kk9a.com
Cc: Elecraft Reflector
Subject: Re: [Elecraft] new owner looking for fuses.

 

This is incorrect!

The current rating of a fuse is independent of the voltage.

The fuse blows as a result of heat, which is proportional to I squared times R. 

The voltage rating is just a guarantee that if it does blow, it won’t stay conductive due to an arc.

 

Victor 4X6GP 


On 15 Jul 2018, at 5:21, <john at kk9a.com> <john at kk9a.com> wrote:

Correction: I believe that there are conditions where you would have 240
volts on the fuse in a standard single phase 240v circuit so it's best to
use the standard 250v fuses. Of course 250v fuses are also fine with 120v
amp wiring but the amperage will double.

GL

John KK9A