[Elecraft] KX3 vehicle mount

[Jim Brown]

OK.  In the absence of learning something different, I agree with your 
analysis, Josh.  One of the great things about sticking your neck out 
and saying what you think you know is that when you're wrong, folks will 
tell you about it. :)

Thanks!

73, Jim

On Mon,9/12/2016 7:40 PM, Josh Fiden wrote:
> How I understand it is that the sensor is measuring charge/discharge 
> current of the battery.
>
> The following assumes the radio is connected directly to the battery 
> terminal:
>
> Case 1. If the alternator is running, then current to the radio is 
> passing through the sensor which looks like charging current to the 
> battery.
>
> Case 2. If the alternator is not running, then the current to the 
> radio is discharging the battery, but not being registered by the sensor.
>
> If instead we connect the radio's negative supply to the chassis 
> ground side of the sensor, then the sensor can correctly measure when 
> the radio is discharging the battery.
>
> Caveat: my understanding of this is from the fount of all knowledge, 
> i.e. I read about it on the internet! If I got it wrong, someone 
> please correct.
>
> 73,
> Josh W6XU
>
> On 9/12/2016 5:56 PM, Jim Brown wrote:
>> Thanks Josh.
>>
>> To confuse the sensor, it seems to me that the sensor would need to 
>> be built into the battery lug, so that it was between where we could 
>> connect our 12V minus lead and the battery -- i.e., so that our 
>> current was going through it.  I was assuming it was on the wire side 
>> of the battery lug. I haven't seen one of these things, so I must 
>> plead ignorance.
>>
>> Thanks and 73, Jim
>
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