[Elecraft] K3S Audio buzz on transmit, especially AM

[W2xj]

Sounds like some internal RF feedback.

Sent from my iPad

> On Apr 26, 2019, at 11:43 AM, Nicklas Johnson <nick at n6ol.us> wrote:
> 
> This morning just for yuks, I also temporarily disconnected the ground from
> the rig entirely while also connecting only to a dummy load, so there could
> be no path to ground at all, let alone multiple paths.  No change.
> 
> I guess the next things I'll probably try are a full factory reset, and
> then perhaps popping it open to make sure nothing has come unseated.  But
> first I'll drop a line to Elecraft support too.  I've seen a number of
> people post about similar problems that either magically resolved
> themselves or ended up being a fault on the audio board.
> 
>   Nick
> 
> 
>> On Thu, 25 Apr 2019 at 23:27, Nicklas Johnson <nick at n6ol.us> wrote:
>> 
>> Again, the problem persists with all inputs completely disconnected and
>> the mic gain set at 0. And running solely on a battery into a dummy load.
>> 
>>   Nick
>> 
>> On Thu, Apr 25, 2019, 10:10 PM Jim Brown <jim at audiosystemsgroup.com>
>> wrote:
>> 
>>>> On 4/25/2019 8:15 PM, Nicklas Johnson wrote:
>>>> Physically touching the case or grabbing the barrel of the front panel
>>> mic
>>>> connector actually does cause the buzz to get just a little softer.
>>> 
>>> I suspect either a bonding problem or a problem with the wiring of the
>>> mic.
>>> 
>>>> I generally use solar/battery power, though my ground is bonded to my
>>>> utility ground.
>>> 
>>> I suggest that you carefully study either N0AX's recent ARRL book on
>>> grounding and bonding, or the slides for talks I've given at Visalia and
>>> Pacifion.
>>> 
>>> 73, Jim K9YC
>>> 
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>> 
> 
> -- 
> *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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