[Elecraft] Anderson Powerpoll connector

[Wayne Burdick]

Jeff,

I've never seen a drop anywhere near this size across an APP  
connector. The contacts themselves are rated at something like 6  
microohms resistance.

How are you measuring the drop? The K3's supply voltage display is not  
a good way to measure the drop across just the connector, because the  
voltage shown reflects several other components' voltage drops. These  
include the reverse-polarity protection diode, the self-resetting fuse  
for the low-power circuitry, and the current-sense resistor. On  
keydown, even circuit traces will show a drop, as will the cable  
between the rig and the power supply.

73,
Wayne
N6KR



On Mar 24, 2011, at 3:08 PM, Jeff Cochrane - VK4BOF wrote:

> I just cannot relate to the voltage drop across the connectors when  
> drawing 20+A.
> On my rig (with its factory built cable) it approaches 1.2 Volt.  
> (And yes, the connectors do get warm!)
> Even with decent cables that I have made using 4mm wire and 45Amp PP  
> connectors I still see .6 to .8V drop.