Check the schematic.  The aux 12V is really "close" to the 12V input,
being dropped by one diode and a FET junction.  There's no shunt in
that leg.  No way to measure I to the 12V output.

matt W6NIA

On Mon, 30 May 2011 18:18:44 +0100, you wrote:

>Well, it's in the title really, but I was surprised to find that
>turning the P3 off does not reduce the current reading on the K3
>display (the P3 is powered by the 12v acc skt).  That's a pity as it
>would be useful to see the load on that socket without using an
>external ammeter.  Yes, I do have other 12V supplies etc etc..... :-)
>
>I guess that's a hardware rather than a firmware issue?
>
>73 Stephen G4SJP
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