Re: K3S Audio buzz on transmit, especially AM

Posted by Nicklas Johnson on Apr 26, 2019; 3:43pm
URL: http://elecraft.85.s1.nabble.com/K3S-Audio-buzz-on-transmit-especially-AM-tp7651148p7651161.html

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 <[hidden email]> 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 <[hidden email]>
> 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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