[Elecraft] KX3 Audio Power

[Doug Person]

This has been a significant problem for the powered speakers I have 
tried.  Even the West Mountain Radio speakers that are supposed to be RF 
proof are not RF proof.

I'm going to try a few of the single-ic audio chips to see I can produce 
enough clean audio while avoiding the RF feedback problem.

Doug -- K0DXV

On 3/27/2014 11:47 PM, Jim Brown wrote:
> 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
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