The NT1A components do not get warm enough to prevent condensation. I made =
a thermal/FLIR image of the mic some time ago and found about 2.2C differen=
ce over the board. The 4 resistors near the HOT/COLD/Ground wires from the=
3 pin XLR connector (4.7K,4.7K,1K,1K) were the hotest followed by a transi=
stor at 2 oclock from the bias voltage generating IC. Rest of the board was=
at ambient temp.
-Mike.
--- In "natureguyusa" <> =
wrote:
>
> Hi Arnthor,
>
> I use the Rode NT1-A microphones and have similar issues when the microph=
ones are exposed to high humidity. The moisture condenses on the large elem=
ent and essentially the mics either stop working, make a popping sound, or =
just make noise. The only thing you can do is to keep the mics as dry as po=
ssible. I use some resistive heaters (some resistors powered by a 12 volt b=
attery)on the back side of the microphone's screen, and under my windscreen=
to heat the mic up some to stop condensation. The issues usually occur in =
the early mornings, especially if foggy. Sometimes, I just have to wait for=
the heaters to do their work before recording. Try not to leave them outsi=
de overnight. Once dried out, the microphones return to normal operation.
>
> Hope this helps,
> Bruce Rutkoski
> Owner
> www.natureguystudio.com
>
> --- In Arn=FE=F3r Helgason <arnthor.hel=
gason@> wrote:
> >
> > Der listers.
> >
> > I am a new member to this list. I have run a blogpage
> > http://hljod.blog.is =96 Icelandic Soundblog. There are recordings of v=
arious
> > natural sounds. They are devided into several categories. See:
> > fuglar (birds), vatni=F0 (water), sj=F3rinn (the sea) umhverfishlj=F3=
=F0 (sounds of
> > the environment) and recently vindurinn (the wind). More categories wil=
l be
> > set up with English names.
> >
> > For some time I have used R=F8de microphones for my recordings: NT-2A +=
NT-55
> > in a MS-setup and NT-1A in NOS or AB setup. The results have been somet=
imes
> > outstanding.
> > Recently the following problem occurred:
> >
> > Last week I was in a summerhouse and left the microphones outside for w=
hole
> > night on two occasions. I noticed that as the temperature lowered and =
the
> > dew fell on, something happened. A strange noise appeared. The first ni=
ght I
> > had the microphones NT-2A and NT-55 in an MS-setup. Then the NT-2A was
> > affected and the second night both the NT-1A seemed to fail. Strangely =
the
> > microphones seemed to start working as the sun started to shine and war=
m up
> > the microphones which were covered with a dead cat. The temperature may=
have
> > been around 4-5=A8=B0 C and the dew had fallen. The microphones seem to=
have
> > started to fail after around 90 minutes.
> > I have created a soundfile with the noise from one of the NT-1A.
> >
> > Has anyone on this list had any experience with this? My friend, Magn=
=FAs
> > Bergsson, thinks something might be wrong with the cables I used. Some =
test
> > shows that they seem to be in order.
> >
> > The head of the Technical Department of The Icelandic State Radio, Geor=
g
> > Magn=FAsson, thought the failure might be caused by the moisture and t=
he low
> > temperature.
> >
> > This makes me to think what to do. I have Senheiser ME-62 and 64 which =
I
> > have sometimes used in very harsh conditions, but I think they are a li=
ttle
> > too noisy. Until 1 year ago I used a battery pack together with the 62 =
and
> > 64, but now I have invested in two packs without batteries and the
> > microphones semm not as noisy as usually. They can however never be com=
pared
> > with the NT-2A and NT-1A.
> >
> > Natural sounds, as of birds, here in Iceland are very low and sometimes
> > distant.
> >
> > With very best regards,
> > Arnthor Helgason
> >
> > Arnthor Helgason
> > http://hljod.blog.is
> > Email:
> > arnthor.helgason@
> > arnthor.helgason@
> >
> >
> >
> >
> >
>
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