On 6/1/2017 8:11 AM, Ray W2RS via Elecraft wrote: > > With no load, my AC line voltage is 121 and my power supply voltage > is 73. With full load, the readings are 111 and 53, respectively. > That is with the yellow transformer tap in place. Should I switch to > another tap? As Josh said earlier, be very concerned about the10 volt drop in the AC voltage measured at the load. Depending on the "amp-feet" of the circuity feeding the load, the drop for a 1 KW AC load should be no more than the industry standard of 2 volts.
If you have the opportunity, put the amplifier on a dummy load and measure (CAREFULLY) the AC voltage at the entrance panel, the socket if it's a duplex one, and the load taps. This will tell you where the drop is occurring. I can't emphasize it more - BE CAREFUL. As an EE you know that. (Among other things my company designs comm station AC and DC power installations - if you need help, just ask.) Ray - contact me directly. Our paths have crossed way back when...... 73 de K2ASP - Phil Kane (since 1952) Elecraft K2/100 s/n 5402 VP - General Counsel & Engineering Manager CSI Telecommunications, Inc. - Consulting Engineers San Francisco, CA - Beaverton, OR ______________________________________________________________ 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
