[Elecraft] K3 high pitched tone and noise when keying the mic

[Paul Taenzer]

The 'low battery' issue was the problem.

I tweaked the power supply voltage up to 12.8 or so and no more noise!

Thanks everyone for your assistance.

73s

de Paul VA3LX

Paul Taenzer
ptaenzer at gmail.com
613-385-1226

On Sun, Nov 15, 2015 at 5:38 PM, Paul Taenzer <ptaenzer at gmail.com> wrote:

> One more thing I just noticed.
>
> Sometimes (I can't figure out the pattern) the bottom line on the K3
> display says low battery.
>
> I'm not sure what that could be referring to.
>
> Perhaps it's related to the mic noise??
>
> TNX
>
> Paul
> VA3LX
>
> Paul Taenzer
> ptaenzer at gmail.com
> 613-385-1226
>
> On Sun, Nov 15, 2015 at 5:35 PM, Paul Taenzer <ptaenzer at gmail.com> wrote:
>
>> Thanks for you quick response!
>>
>> Unfortunately that didn't seem to do the trick.
>>
>> The speakers are not on (speakers + phone = no) and I tried turning the
>> monitor gain to zero.
>>
>> Still no joy.
>>
>> Other thoughts?
>>
>> TNX agn,
>>
>> Paul
>> VA3LX
>>
>> Paul Taenzer
>> ptaenzer at gmail.com
>> 613-385-1226
>>
>> On Sun, Nov 15, 2015 at 5:00 PM, Pierfrancesco Caci <pf at tippete.net>
>> wrote:
>>
>>> >>>>> "Paul" == Paul Taenzer <ptaenzer at gmail.com> writes:
>>>
>>>     Paul> I recently developed a high pitched tone and seemingly random
>>>     Paul> noise when
>>>     Paul> keying the mic with either PTT or VOX
>>>
>>>
>>>     Paul> The noise goes away when the mic gain is set to zero. Changing
>>>     Paul> from the
>>>     Paul> Yamaha CM500 to a random computer headset made no difference.
>>>
>>>
>>> how's your monitor level set? I once forgot to turn it down after some
>>> tests, and it was getting back in the mic, causing the typical loop
>>> whistle.
>>>
>>> --
>>> Pierfrancesco Caci, ik5pvx
>>>
>>
>>
>