🚀 go-pugleaf

D wrote:

> On Oct 17, 10:13 pm, Bob I <bire...@yahoo.com> wrote:
> 
>>The problem is likely caused by the combination of "speakers" being
>>disconnected by the insertion of the head phones AND the volume knob of
>>the speakers being cranked up rather high. Now the speakers are
>>amplifying the hum of the little power wart.
>>
>>
>>
>>D wrote:
>>
>>>On Oct 17, 1:44 am, "Richard Crowley" <rcrow...@xp7rt.net> wrote:
>>
>>>>"D"  wrote ...
>>
>>>>>It does not hum when no headset is plugged in.
>>
>>>>Then you can eliminate any problem with the computer,
>>>>the sound card, or any software including drivers, etc.
>>
>>>>>One of the headsets is brand new and checked.
>>
>>>>What does "checked" mean?  Do either of the headsets work
>>>>OK on another computer?
>>
>>>>>Yes, the hum changes when I move the headset around the room: the
>>>>>further from the computer case the louder.
>>
>>>>I would take a wild guess that it has a shielding or grounding problem.
>>
>>>>>Yes, it hums when I try using a differen computer mic: both headsets.
>>
>>>>The problem may be with the basic design if both headsets
>>>>show the same symptoms.
>>
>>>Thanks Richard Crowley for your suggestions!
>>>The hum is from speakers, not from the case.
>>>Yes, either of the headsets work OK on another computer.- Hide quoted text -
>>
>>- Show quoted text -
> 
> Thanks Bob I for your explanation!
> How can the speakers amplify the hum of the little power wart if they
> are disconnected by the insertion of the head phones?
> A Sony ECM-T6 microphone and another desk-top microphone don't hum! A
> new Koss sb/45 headset and Philips SBC HM300 headset hum from their
> microphones.
> How to make Koss sb/45 headset microphone work?
> Best regards,
> Dima

The speakers are only disconnected from the audio source, the "wall 
wart" is still powering the speakers amplifier. Try turning the volume 
knob down or unplug the speakers little power supply.
>