Jay, When you turn the KPA500 off the fan should run until it drains the high voltage from the power supply capacitors, which takes about ten seconds on my KPA500 #119. It should not run for 15 minutes. I would send an email to the support address listed on the Elecraft web site regarding that behavior.
It is normal for the fan the be off when the amp is turned on. The default setting on the fan is for the fan to stay off until the RF devices begin to warm up. The fan will change speeds as the temperature of the devices rise. Since the fan is a major part of the KPA500's protection I would not operate the KPA500 until that behavior has been corrected. 73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Sat, 16 Jul 2011 13:31:30 -0700, Jay <livn2g...@q.com> wrote: >Just did the first voltage test on #153. Basically I turned it on to >check that the tap is the right one, then turned it off. The fan ran >for over 15 min before I turned it on again (which shuts the fan >down).... How long should it go before shutting down? Repeated the >procedure and tapped "temp" and it showed 23.5 C and the fan does not >run while in "Standby", but it comes on again when I tap the power >button. Still running as I type. Is this adjustable? Jay, W6JDB >______________________________________________________________ [snip] ______________________________________________________________ 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
