[Elecraft] K3 Background noise

[Ron D'Eau Claire]

I'm not aware of any config settings that would affect mic noise pickup. The
"RF Gain" has no effect on transmit audio. (It's used only in receive when
you don't want full receiver AGC action.)

You didn't provide any details of your setup or the noise so here's some
general points to consider if you haven't already:

1) Use a close-talking mic. The difference between being 1/2" and 2" from
the mic itself makes a huge difference, but the mic must be designed for
that sort of service. Many "studio" mics on booms or stands designed to pick
up audio from several inches or more away lack pop filters and other
features needed for good audio when talking close. Most "communications"
mics are set up for close talking. 

2) Reduce the mic gain. Don't drive the compressor hard expecting it to
control the audio level with the mic gain high. 

3) Move the noise source away from you. Just doubling the distance will
reduce the noise substantially. 

4) Look at the acoustics of your setup. Are you in a corner in a room with
smooth walls? If so, noises from all over the room will reflect off of the
walls and concentrate near you. Even a single flat wall near the rig will do
that somewhat. If so, you might consider some soft material (carpeting works
FB) on the wall(s) behind the rig. 

5) Use a noise-cancelling microphone. Often the first choice, but good ones
are expensive and even a noise cancelling mic isn't perfect. 

Ron AC7AC



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jay Rodaman
Sent: Sunday, May 24, 2009 6:56 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] K3 Background noise

I have a problem with noise in the shack.
On transmit it is picked up by the mic. Other than lowering the RF gain I
understand that
there is a setting which could reduce or eliminate this
some where in the config.  Any tgoughts would be appreciated.

Thanks 
Jay
Jay Rodaman