Klaus, Are you sure it is the KPA500?
My computer speakers in the shack will hum when using any of my HF amplifiers on CW. 73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Mon, 1 Aug 2011 07:33:05 +0000, Klaus Koppendorfer <[email protected]> wrote: > >Last week i assembled the kpa500 of oe6rdd >when we transmit we hear a realy loud hum (50hz) in the rythm of the cw signals > >i have compared this with my own kpa-500 and there is no hum >i have tried to loosen the big srew which holds the tranformer with no result > >any ideas ?? > >73 >Klaus >OE6KYG >KX1 244 >K2 1331 >K3 115 > >______________________________________________________________ >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
