Our club group recently bought a number of inexpensive volt/amp digital meters on eBay to use in an APP distribution box project and we found the same problem - the current is sensed in the negative/ground lead. So any other ground connections from the rig end up in parallel with it. I have batteries in my KX3 but always use a gel cell for power when portable camping etc.; I also use a buck/boost regulator that supplies a constant 14VDC to the KX3 from the battery, since both ground and hot leads from the battery are isolated from ground, the Watt's Up works well. Sometimes I add three 10W solar panels and a charge controller to help keep the battery topped up. The Barrie WAX Group website is at: http://barrie-wax-group.dyndns.org/ 73, AL - VE3RRD
-----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Jim Brown Sent: Thursday, January 21, 2016 4:08 PM To: [email protected] Subject: Re: [Elecraft] KX3 feature request: mAh counter On Thu,1/21/2016 5:58 AM, Al Duncan wrote: > There are a number of compact devices available that do that and more. I use > the miniature "Watt's Up" watt meter/power analyzer which displays battery > voltage, current, mAh, watts and Wh. Yes and no. All versions of this product I've seen read current in the NEGATIVE lead. That's fine of the unit is in series with the battery, but it will yield VERY WRONG data if inserted in series with equipment in a station. At the Visalia DX Convention last spring, I found the Hamsource EZ Meter II, which reads current in the POSITIVE lead, and yields good data for individual equipment items in a station. It does NOT read Ah. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
