Re: XG3 Arrived

Posted by Guy, K2AV on Apr 21, 2011; 6:16pm
URL: http://elecraft.85.s1.nabble.com/XG3-Arrived-tp6292867p6295107.html

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 <[hidden email]> 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: [hidden email]
> [mailto:[hidden email]] On Behalf Of Wayne Burdick
> Sent: Wednesday, April 20, 2011 8:31 PM
> To: Edward R. Cole
> Cc: [hidden email]
> 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:
>
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