[Elecraft] Experience with KXPA100

[Carl Clawson]

Really depends on the gauge and length of wire you're using. Find your wire
data, for instance at http://www.powerstream.com/Wire_Size.htm. You'll be
shocked at how much voltage you can drop at 100 watts using a few feet of
what you thought was heavy gauge wire. Example: 12 gauge wire is 1.6
milli-ohm per foot. Two conductors -> 3.2 milli ohms per foot. Six feet of
wire = 19 milli ohms. 19 milli ohms x 20 amps = 0.4 volts. So yeah, it's
easy to lose more then 0.2 volts.

73, Carl WS7L


On Tue, Jun 24, 2014 at 5:37 PM, K8JHR <jrichards at k8jhr.com> wrote:

> Er...  um...  is such a large voltage drop typical?   We don't see that
> happening on Brand X amps using good power supplies.  I understand the
> voltage drop when going from, say, 10 to 100 watts should be minimal, like
> no more than .2 volts.