[Elecraft] KX3 Audio Power

[Richard Patrick]

Regarding the message below...

I too have adjusted my KX3s RXEQ to enhance the audio frequency spectrum
that is for voice (and CW)
communications.  Using my KX3 (and other radios like my collection of Heath
QRP radios) in my
ham shack I use West Mountain Radios Comm Speakers.  They are advertised as
RF proof...
and I think they are right.  Operating 200 watts doesn't interfere with the
WMR speakers or I have no
RFI in my shack- how likely is that?  Oh yah, they sound pretty well with
my KX3, HW7, HW8, HW9.
See: http://www.westmountainradio.com/product_info.php?products_id=com_spkr
I got mine at HRO.
FWIW,
Rich KR7W

Message: 15
Date: Thu, 27 Mar 2014 22:47:18 -0700
From: Jim Brown <jim at audiosystemsgroup.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KX3 Audio Power
Message-ID: <53350CE6.6060202 at audiosystemsgroup.com>
Content-Type: text/plain; charset=windows-1252; format=flowed

On 3/27/2014 6:02 PM, Ross Primrose N4RP wrote:
> Just use a pair of small amplified computer speakers

Be careful about that -- most amplified loudspeakers have RFI problems.

Remember that the KX3 is specifically designed to be a backpacking rig,
so everything, including the audio amp, is designed to be stingy about
using battery power.

One simple thing we can do to maximize the audio output level is to use
RXEQ to roll off the lower three bands. The sound in these lower bands
makes no contribution to communications, but it does use power, so when
we get rid of it, we can use the power for the sound that matters.

73, Jim K9YC