🚀 go-pugleaf

On Oct 29, 9:11 pm, Bob I <bire...@yahoo.com> wrote:
> D wrote:
> > On Oct 25, 4:37 pm, Bob I <bire...@yahoo.com> wrote:
>
> >>D wrote:
>
> >>>On Oct 24, 11:01 pm, Bob I <bire...@yahoo.com> wrote:
>
> >>>>D wrote:
>
> >>>>>On Oct 24, 5:13 pm, Bob I <bire...@yahoo.com> wrote:
>
> >>>>>>D wrote:
>
> >>>>>>>On Oct 24, 1:04 am, "Richard Crowley" <rcrow...@xp7rt.net> wrote:
>
> >>>>>>>>"D"  wrote ...
>
> >>>>>>>>>Microphones with a battery do not hum. Why?
>
> >>>>>>>>Because the battery is independent of the mains power.
>
> >>>>>>>>That confirms that the problem is coming from the mains-
> >>>>>>>>derived microphone power coming through the sound card.
>
> >>>>>>>>>How to make microphones without a battery not hum?
>
> >>>>>>>>Replace the sound card with one that works properly.
> >>>>>>>>(Or just continue to use the battery.)
>
> >>>>>>>Thanks Richard Crowley for your answers!
> >>>>>>>I have two cards: SB Live ct4830 and SB 16 PnP. They both hum from a
> >>>>>>>headset microphone.
> >>>>>>>Best regards,
> >>>>>>>Dima
>
> >>>>>>I suspect that it isn't the Microphone that is humming but that a HUM is
> >>>>>>heard in the headphones WHEN the microphone is plugged in? If that is
> >>>>>>the case then perhaps the problem is the filter capacitors on the
> >>>>>>motherboard or powersupply are the problem?- Hide quoted text -
>
> >>>>>>- Show quoted text -
>
> >>>>>Thanks Bob I for your opinion!
> >>>>>A HUM is heard in the headphones WHEN the microphone is plugged in and
> >>>>>not muted. The hum is not heard when the microphone is muted.
> >>>>>How to know which filter capacitors are the problem: on the
> >>>>>motherboard or powersupply?
> >>>>>Best regards,
> >>>>>Dima
>
> >>>>That would be a hardware issue, the powersupply would be the easiest to
> >>>>swap out. You've proved the soundcards don't make a difference.- Hide quoted text -
>
> >>>>- Show quoted text -
>
> >>>Thanks Bob I for your suggestion!
> >>>Could a mainboard BIOS setting be the problem? The same hum was with
> >>>an old power supply. The hum increases if I increase the microphone
> >>>volume.
> >>>Best regards,
> >>>Dima
>
> >>I would doubt that a BIOS setting would have an effect on this. Since
> >>the hum is being picked up in the microphone circuitry and being
> >>amplified, increasing the mike volume increases the sounds. You might
> >>try moving the sound card to a different motherboard slot to see if
> >>there is any reduction in the hum by moving it further away from some
> >>component.- Hide quoted text -
>
> >>- Show quoted text -
>
> > Thanks Bob I for your suggestion!
> > I installed the sound cards to different slots. This did not help.
> > Best regards,
> > Dima
>
> Then it would seem that the motherboard would be the problem. Is there
> perhaps any "swollen" or leaking capacitors on the motherboard.- Hide quoted text -
>
> - Show quoted text -
Thanks Bob I for your help!
There are no any "swollen" or leaking capacitors on the motherboard.
Dima