Most power supplies lose a lot of their filtering under very light loads. If he's hearing a buzz, it's likely from amplitude modulation of the signal from what for an extremely light load would be a noisy power supply.
The way to tell is to see if it goes away running it from a 9 volt battery. 73, Guy On Thu, Apr 21, 2011 at 11:15 AM, Ron D'Eau Claire <[email protected]> wrote: > As soon as you filter out the harmonics - which the receiver does very well > - you have a sine wave. > > Ron AC7AC > > -----Original Message----- > Wayne, > Wouldn't you hear it on a radio in CW mode? The tone is added in receiver, > so hearing tone means hearing "pure carrier". Last I knew CW is the "pure > carrier". > 73, > Igor, N1YX > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Wayne Burdick > Sent: Wednesday, April 20, 2011 8:31 PM > To: Edward R. Cole > Cc: [email protected] > Subject: Re: [Elecraft] XG3 Arrived > > Ed, > > You should not hear a hum or buzz when listening to the XG3 on a > receiver. The fact that's it's not a sinewave doesn't mean that it has > audio-frequency modulation; it is a pure carrier. You might be hearing > 60-Hz pickup due to the lack of a common ground, etc. > > Wayne > N6KR > > > On Apr 20, 2011, at 5:20 PM, Edward R. Cole wrote: > > ______________________________________________________________ > 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
