Thanks Ron. I'll open it up and measure it with a torque wrench. Then wait for Elecraft tech support to call back. Sometimes it's a drag living on the East Coast :-( -Kevin (KK4YEL)
No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced ! > On Dec 19, 2016, at 22:53, Ron D'Eau Claire <[email protected]> wrote: > > Joe might be right but contact Tech Support first. The transformer is held in > place with a single large bolt through the center (it is a torodial > transformer). If that bolt is not tightened properly the magnetic field will > produce a huge vibration. Even if you did not build the amp from the kit, > it's a pretty simple job to tighten that bolt. Tech Support can lead you > through the process. It is also described in the kit assembly manual > available on the Elecraft web site here; > http://www.elecraft.com/manual/E740149%20KPA500%20Kit%20Assembly%20Manual%20Rev%20F6.pdf > > See pages 36 and 37. > > 73, Ron AC7AC > > -----Original Message----- > From: Elecraft [mailto:[email protected]] On Behalf Of W1GO > (Joe) > Sent: Monday, December 19, 2016 6:19 PM > To: kevino z > Cc: Elecraft Reflector > Subject: Re: [Elecraft] [KPA500] incredible hum from PA > > Kevin, > > Yes. had the problem. Crazy loud hum / buzz. Bad transformer I was told. > All quiet on the eastern front now. If it is a bad transformer it can be > fixed but you’ll have to eat the shipping charge. > > Joe > W1GO > >> On Dec 19, 2016, at 9:10 PM, kevino z <[email protected]> wrote: >> >> Just got my KPA500 and KAT500. I hooked the PA up to 240v (well, my Mains >> are 248v), so I made sure the assembled PA has the yellow transformer tap, >> from the factory. >> When I engage the amp, there is a crazy buzz. I use a KPA500 at work, but it >> is on 120v and I never hear this buzz. Before I swap fuses, and switch over >> to 120v to test, does anyone else have this issue? >> The KPA500 is hooked up to a KX3/KXPA100 combo, just in case someone would >> ask. >> Thanks >> -Kevin (KK4YEL) >> >> >> No trees were killed in the sending of this message. However, a large number >> of electrons were terribly inconvenienced ! >> ______________________________________________________________ >> 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 Message delivered to >> [email protected] > > ______________________________________________________________ > 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 Message > delivered to [email protected] > ______________________________________________________________ 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 Message delivered to [email protected]
