[Elecraft] K3 Current Drain When Off

[Stephen Prior]

Ron,

I'm not sure if your posting was directed at me or not, but I didn't
mentally move the decimal point :-)  It was a fundamental limitation of the
(good, I thought) DMM I was using.
It just goes to show that you can't always believe what your measuring
instrument is telling you, as I tell my students frequently!

73, Stephen G4SJP


On 19 October 2013 18:24, Ron D'Eau Claire <ron at cobi.biz> wrote:

> Yes, that was my mistake (mentally moving the decimal point!)
>
> However, several others including me have measured a real parasitic drain
> of
> almost 40 mA (38 mA in my case) that is produced by the KPA3. I
> disconnected
> the power to the KPA3 at the circuit breaker and the drain dropped to
> virtually zero.
>
> The measurement was made by placing an ammeter in the positive lead from
> the
> power supply. Nothing at all connected to the K3 except for the power
> cable.
>
>
> It's not an issue to me because I switch off the dc supply when leaving the
> shack, but there are a significant number of Hams who run from batteries
> and
> solar panels even at home. 40 mA can be very significant to them if the rig
> is left connected to the battery.
>
> 73 Ron AC7AC
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jim Brown
> Sent: Friday, October 18, 2013 4:52 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 Current Drain When Off
>
> On 10/18/2013 2:57 PM, Ron D'Eau Claire wrote:
> > That only explains the apparent drain of several amperes Jim noticed.
>
> If you're talking about me, the false readings I was getting from the Watts
> Up meter were in the range of 40 mA, and a Fluke measured 4 mA in the
> positive lead. There may, however, be something happening on  the negative
> lead that is causing the false readings. I don't have a fixture yet to put
> a
> Fluke there. I should do that.
>
> 73, Jim K9YC
>
>
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