--- In Walter Knapp <>
wrote:
> jyoung1113 wrote:
> > I recieved my new DAT-stereo mic yesterday, boy what a wonderful
mic!
> > I hooked it up to my Portadisc recorder and found a hum. It only
has
> > this hum while it is plugged into ac, not when running on battery
> > only.
> > I tried upgrading my cables, no help. I tried it on other mic's,
> > no hum.
> > Perhaps one of you recognizes my error and can help set me
straight?
> > Thanking you in advance,
>
> The Telinga is intended to be recharged from another battery. If you
are
> using a AC battery charger to charge it, then that's likely the
source.
> I've always used some 9.6volt NIMH batteries to charge it. It's
internal
> battery, like most 9 volt rechargables is actually a 7.2volt
battery. If
> you can locate some of the higher voltage 9 volt rechargables they
will
> work the same as the alkaline 9 volt batteries it was designed for.
>
> If the hum is due to the Portadisc charger, that's not normal. I
never
> get any hum when using it while it's plugged into it's AC power.
>
> Usually hum otherwise is a indication of a grounding problem.
>
> And, last, if you are testing the Telinga inside it's almost
impossible
> to find anywhere you won't pick up hum from something. The mic is
that
> sensitive. Try it all outside on batteries and see.
>
Thank you Walt for your quick response.
Yes the hum comes when I use the Portadisc ac/dc plug in or using the
Portadisc using the "mains".
When I unplug teh Portadisc all is fine, but plug it in and I get this
hum.
I tried different mics and they don't give me this problem, just the
DAT-stereo
You sure are right about the mic being sensitive and strong though,
I have never experienced anything like it.
Well I guess I should have the Portadisc looked at, I just hate to
go with out it for 2 weeks.
Thanks again Walt,
J
> Walt
>
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