[Elecraft] K3S Audio buzz on transmit, especially AM

[W2xj]

EQ should have nothing to do with solving the problem. EQ just masks it. 

Sent from my iPad

> On Apr 26, 2019, at 6:56 PM, Bob McGraw K4TAX <rmcgraw at blomand.net> wrote:
> 
> I recall commenting earlier.  What TX EQ values are being used for AM. ?
> 
> Bob, K4TAX
> 
> 
> Sent from my iPhone
> 
>> On Apr 26, 2019, at 5:48 PM, Nicklas Johnson <nick at n6ol.us> wrote:
>> 
>> My desk in this case sits adjacent a wall, and there's only a shower on the
>> other side of that wall.  I did turn off everything in the vicinity of the
>> desk and all the lights in the room (I've in fact heard a very similar hum
>> from the switching power supply for my mixer, and my first thought was it
>> was this that was being picked up), but I didn't turn off the computer on
>> the other side of the room.  In this case it will be easier to move the rig
>> outdoors with a battery than it will be to turn that computer off for the
>> moment.  It would have to be an impressively/obnoxiously strong magnetic
>> field from that side of the room to influence the transformers inside the
>> rig 8 feet away, but it's worth trying and simple enough to rule it out.
>> 
>>  Nick
>> 
>>> On Fri, 26 Apr 2019 at 14:51, Don Wilhelm <donwilh at embarqmail.com> wrote:
>>> 
>>> In addition to operating from a battery isolated from the solar system,
>>> I would recommend that you do a quick test - remove all cables from the
>>> K3S except the power cable and a coax to a dummy load.  Power down all
>>> power supplies in your station, including any desk lamps.
>>> Go into Transmit by tapping the XMIT button.
>>> Is the hum still present?  If not, then start connecting things to your
>>> K3S one at a time, doing the same test after each thing connected.
>>> 
>>> Of course, if the hum is present with nothing connected, contact
>>> support at elecraft.com - but I cannot imagine a hum with harmonics of 60
>>> Hz being induced if you take away all the 60 Hz operated sources in the
>>> area.
>>> 
>>> 73,
>>> Don W3FPR
>>> 
>>> --
>> *N6OL*
>> Saying something doesn't make it true.  Belief in something doesn't make it
>> real. And if you have to lie to support a position, that position is not
>> worth supporting.
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> 
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