On Tue,2/16/2016 10:07 AM, Guy Olinger K2AV wrote:
I heard of a problem something like this, not a KPA500, that turned out to be a defective wall outlet.
Or a long run of relatively small wire to the outlet from the panel. Or a bad splice at another outlet between your outlet and the breaker panel. Or perhaps you're not plugged directly into the wall, but into some other device or multi-outlet box. A good way to check this is to hang a voltmeter across another outlet wired directly in parallel with the power amp (most wall outlets are duplexes, two outlets in a single enclosure) and watch the AC voltage as you key the amp. Start with fairly low power (100-200W) and gradually increase it until the amp shuts down. As I recall, the KPA500 pulls about 10A at 120V for full power.
There's a very useful device to measure voltage, current, power, VA, power factor, and even kWh. It's called Kill A Watt. You plug it into the outlet, then plug the device you want to test into it. There are several version of it. Here's one, which is what I have.
http://www.p3international.com/products/p4400.html 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
