We're looking into this. 73, Wayne N6KR
On Aug 1, 2011, at 3:11 PM, Lothar Sack wrote: > The same hum here since I changed to the *RED TAP (211 to 230V).* > I had _no hum with the YELLOW TAP (231 to 250 V)_. But then I had less > than 60V with full power. > The hum is coming out of the KPA500. > What to do? > Lothar, DJ8EW > K3 1300 + KPA500 229 > > Am 01.08.2011 09:33, schrieb Klaus Koppendorfer: >> 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
