Jim The KPA500 turns on the fan momentarily when you use the front panel on/off switch. I believe this is to bleed off voltage in the internal power supply. It is a design consideration not a problem
Harlan NC3C Sent from my Verizon Wireless 4G LTE DROID Jim Miller <[email protected]> wrote: >I leave my KPA500 back panel switch in the ON position most of the time and >use the front panel switch to bring it to life. > >However in even when in the "Front panel off/Back panel on" state the >KPA500 will occasionally hum for a few seconds. > >Is this normal? Any suggested causes to worry about? > >Thanks > >jim ab3cv >______________________________________________________________ >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 ______________________________________________________________ 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
