[Elecraft] Mic Noise

[Buck]

The mics work.  My problem was a burst of noise when the rig went into 
transmit.

It appears re-seating the USB cable in the back of the radio has cured 
the problem.  It did not appear to be lose.  And the noise would appear 
even if I was using the VOX or PTT switch or the internal DVR.  In other 
words, not using the USB to trigger the radio.

There's one to put in the books.  I am sure I won't be the only person 
to run into this and I still can't explain it.

k4ia, Buck
K3# 101
Honor Roll  8B DXCC
EasyWayHamBooks.com

On 3/17/2019 12:22 PM, Don Wilhelm wrote:
> Buck,
> 
> It sounds like that noise is coming from whatever computer software 
> application you are using.  You mentioned N1MM.
> When you unplug the USB cable, whatever software you are using loses 
> communications with the radio.
> When you plug it back in, that program is not attempting to re-establish 
> communications.
> 
> What applications do you have active on your computer?
> 
> I again suggest you get the microphone to work first - unplug everything 
> from the K3 except the microphone, the power and the antenna 
> connection.  There may be something unrelated to the microphone going 
> awry, so eliminate everything except the microphone.  When that works, 
> build things back up one at a time until you discover the culprit.
> 
> 73,
> Don W3FPR
> 
> On 3/16/2019 7:13 PM, Buck wrote:
>> I've tried all the combination of mics and mic bias.  The noise 
>> happens even with the mic gain turned all the way down and the rig in 
>> TEST mode.  It happens when N1MM is not running.  It happens using the 
>> internal DVR card.  It happens with the mic disconnected and using the 
>> XMIT button on the front of the radio.
>> -
>> Here is a clue.  If I turn on the VOX and reduce the either the RF or 
>> AF gain on the receiver, I start getting the noise about once every 
>> half second.  It sounds like it starts with a "ping." Sounds like 
>> something is polling the radio.
>>
>> If I disconnect the USB cable on the back of the radio, no noise. It 
>> seemed to be properly seated.  Now, if I plug the USB cable back into 
>> the radio, no noise.  Have I found the culprit?  A lose USB cable?
>>
>