[Elecraft] [K3] K3 and noise with external speakers

[Dwayne Rohmer]

Thomas,

You might want to consider using a macro to adjust the monitor level? At the
same time, you can change the EQ and other settings to suit your needs. 

I use two macros to control microphones, speakers and TX EQ. They are
assigned to PF1 for the hand mike and PF2 for the headset/boom mike. The
last line in these macros changes the monitor level, OFF for speakers, and
ON for headphones. Adding code to change RX EQ might also help you reach
your goal of getting the volume where you want it.

To use these macros, press and hold PF1 to use the hand mike; press and hold
PF2 to use the headset/boom mike. Pressing either PF button a again toggles
the speakers ON and OFF.

select Front mike -  Toggle Speakers ON/OFF - TX EQ set for MH-2	
MN053;DN;DN;MN097;UP;MN255;MG002;CP025;TE+00+14+08+06+08+10+12+00;ML000;

	Select Front Mike
	Toggle Speakers On/Off
	Exit Menu
	Mike Gain 3
	Mike Compression 18
	Transmit EQ +00+14+08+06+08+10+12+00
	Monitor Level 0
	
Select Rear Mike With Headset - Toggle Speakers ON/OFF - TX EQ set for
Acousticom Boom Mike	
MN053;DN;DN;UP;MN097;UP;MN255;MG013;CP024;TE+00+00+00+00+00+00+00+00;ML020;

	Select Rear Mike
	Toggle Speakers On/Off
	Exit Menu
	Mike Gain 11
	Mike Compression 20
	Transmit EQ +00+00+00+00+00+00+00+00
	Monitor Level 25

73,
Dwayne WV5I

> On Tue, May 15, 2012 at 5:08 PM, Thomas Horsten <thomas at horsten.com>wrote:
>
>> Hi,
>>
>> I like to alternate between operating with headset and speakers and 
>> find the K3's built-in speaker inadequate (plus I want stereo). So I 
>> purchased a pair of Audioengine A2 speakers (black, and with the 
>> corresponding desk stands, wonderful little speakers I must say and 
>> they look GREAT next to the K3 - judge for yourself: 
>> http://goo.gl/KErTo)
>>
>> Now the problem is that I have been running with AGC=LOW since it 
>> gives me a comfortable range in the headset. The speakers have a 
>> volume control on the back, so I thought I could adjust that to get a 
>> volume that was similar in the headset. The problem is that with a 
>> low enough AF volume setting on the K3 that the headset isn't 
>> blasting my ears out, and the speakers volume set to give a similar 
>> level to that of the headphones (about 66% of their max), the 
>> speakers give a very noticable very low frequency bassy "click"
>> once a second anytime the K3 is turned on.
>>
>> It's like "thump, thump, thump" at one second intervals. This is loud 
>> enough to be noticeable when the speakers and the headphones are at 
>> about the same level for the real audio. If I turn the speakers' gain 
>> down and turn the K3's AF knob up, I get FB loud enough audio without 
>> hearing this problem, but with a low enough volume in the headset for 
>> it to be comfortable, I have to turn the speakers up where the 
>> "thump" gets noticable to get rid of it again.
>>
>> I'm powering my K3 from a car battery that is in turn hooked up to a 
>> smart charger. This has never caused me any problems in the past, but 
>> it would seem that this artifact comes from the smart charger 
>> somehow, as soon as I disconnect it the problem goes away and I can 
>> have the speaker volume all the way up to max without hearing it.
>>
>> As I said I've never had any audio (or other) problems before from 
>> having that battery charger connected. Any suggestions for what to 
>> try next would be appreciated.
>>
>> 73, Thomas M0TRN
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