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Re: Telinga Pro6 /Fostex FR2 Problem

Subject: Re: Telinga Pro6 /Fostex FR2 Problem
From: "Lindsay Cargill" loxiaguitarista
Date: Sun Dec 17, 2006 1:32 pm ((PST))
Hi Klas,

Many thanks for all you are doing to help. I am baffled too, but can
only go by my ears, my technical knowledge being somewaht limited.

One, thing though, and I might be mistaken, could it be a Phantom
Power issue/conflict between recorder and mic ? Capicitors in the
recorder not blocking the voltage ( whatever that means ! )?

I say this because when I used your 9V Power box ( with 2 XLR's )
that I was sent by mistake ( not needing it), I could swear that
this noise was not apparent, or certainly not as bad. With this the
Phantom power on the FR2 was obviously switched off. It also works
fine (I think) with a Mini Disc recorder and your 3.5mm 9V power
box, again no PP. This all suggests something to do with Phantom
power to me, but I have no idea what.

I am getting a loan of a Tascam Digital 8 track recorder and will
check it with this (it has 48v Phantom Power).

Might need to get one of your Pro6 Power Boxes with output to two
XLR jacks ?



Lindsay



--- In  Klas Strandberg
<> wrote:
>
> Hi Lindsay!
>
> I guess this is not a topic for the group, but as it started here
> (surely by mistake) I can as well answer it here.
>
> I can't explain it. I tested it with the bench mic amp, with my
old
> Tascam, with Zoom H4 and with another home-built amp with phantom
power.
> What I could hear was a too high self noise, which disappeared
when I
> replaced a leaking capacitor. I thereby hoped that I also
fixed "your" problem.
>
> There is nothing more I can do without also having your FR2, but
it
> is quite a lot of paper work to get such a thing through the
customs
> without extensive costs.
>
> Dan? What do you say? Can you help Lindsay?
>
> Klas.
>
>
>
> At 17:41 2006-12-17, you wrote:
> >Hi Klas,
> >
> >I am afraid the problem is still there and has not been fixed. I
> >received the mic back from you the other day and in field use
today
> >the same excessive noise was there on startup of the Fostex FR2
> >and "disappeared" after about 10-15 minutes with an audible click,
> >whereby the self noise was tolerable, and I would presumme normal
> >for a Telinga.
> >
> >It is exactly as before, and as per the sound sample I sent you in
> >Nov. The noise really is quite bad and is certainly evident on the
> >recordings unfortunately.
> >
> >Help !
> >
> >Lindsay
> >
> >--- In  Klas Strandberg
> ><telinga@> wrote:
> > >
> > > Hi!
> > >
> > > Reminded by Richard Kemp that you had to wait a long time for
your
> > > Telinga, I had a look at it tonight.
> > >
> > > I couldn't hear any "rumble on top of the self noise", as you
> > > describe it, but I could hear a too high self noise.
> > > This was caused by a condensor (in the voltage regulator) that
> >didn't
> > > polarize as it should.
> > > I replaced it, and all I can do for now is to hope that I have
> >fixed it!
> > > I'll send it tomorrow.
> > >
> > > Best wishes,
> > >
> > > Klas.
> > >
> > >
> > >
> > > At 12:35 2006-11-08, you wrote:
> > > >Many thanks for your help Klas. Do you need the mic as well
as the
> > > >handle ?
> > > >
> > > >Best wishes,
> > > >
> > > >Lindsay
> > > >
> > > >
> > > >--- In  Klas Strandberg
> > > ><telinga@> wrote:
> > > > >
> > > > > I think it sounds like a delayed (!!!) base filter
function,
> >but
> > > >I'm
> > > > > not sure. The base filters are independent, but the error
is in
> > > >both
> > > > > mic's. That makes we wonder.
> > > > >
> > > > > Dan's suggestion about a self-healing condensor is also
> >plausible,
> > > > > but both base filters are obviously affected and I don't
> > > >understand
> > > > > how that happens.
> > > > >
> > > > > I don't think it is an interaction between the handle and
> > > >recorder.
> > > > > Send the handle here and I can have a look at it asap.
> > > > >
> > > > > Klas.
> > > > >
> > > > >
> > > > >
> > > > > SomethingAt 18:40 2006-11-04, you wrote:
> > > > > >I have been using a Telinga Pro 6 for a few months with a
> >Fostex
> > > >FR2
> > > > > >and am experiencing a really strange phenomena.
> > > > > >
> > > > > >On starting the FR2 from cold and going into standby
recording
> > > >there
> > > > > >is a rumbling noise on top of the self hiss that can be
heard
> > > > > >through the headphones. After 2-5 minutes this noise cuts
out
> >(
> > > >with
> > > > > >a click ) and the self noise is acceptable(?). This
rumbling
> >noise
> > > > > >is recorded on to audio tracks which is not great.
> > > > > >
> > > > > >The first time I was aware of this noise I actually
thought it
> > > >was a
> > > > > >generator running in the background at one of my regular
> >sites -
> > > > > >that's how bad it is.
> > > > > >
> > > > > >I use the FR2 on stereo, 44.1, 16 bit and use phantom
power
> >to run
> > > > > >the Pro6, which is set in the middle position. I use a
> >Tekkeon "My
> > > > > >Power Lithium" rechargeable set on 12 volts in to the DC
of
> >the
> > > >FR2,
> > > > > >but it also makes this noise with x8 AA rechargables in
the
> > > >machine
> > > > > >itself.
> > > > > >
> > > > > >I also have a ME67 and this doesn't create or induce this
> >noise
> > > > > >which is making me suspect the Pro6 mic / recorder
> >combination.
> > > > > >
> > > > > >However, once the noise cuts, the FR2 can be switched on
and
> >off
> > > > > >with no problems. Seems ridiculous to say it but it is
like
> >the
> > > >mic
> > > > > >needs to warm up ?!
> > > > > >
> > > > > >Has anyone else experienced this and solved it ? Is there
a
> > > >problem
> > > > > >with my mic or my recorder ? What do you think Klas ?
> > > > > >
> > > > > >Cheers,
> > > > > >
> > > > > >Lindsay
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >"Microphones are not ears,
> > > > > >Loudspeakers are not birds,
> > > > > >A listening room is not nature."
> > > > > >Klas Strandberg
> > > > > >Yahoo! Groups Links
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > > Telinga Microphones, Botarbo,
> > > > > S-748 96 Tobo, Sweden.
> > > > > Phone & fax int + 295 310 01
> > > > > email: telinga@
> > > > > website: www.telinga.com
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >"Microphones are not ears,
> > > >Loudspeakers are not birds,
> > > >A listening room is not nature."
> > > >Klas Strandberg
> > > >Yahoo! Groups Links
> > > >
> > > >
> > > >
> > >
> > > Telinga Microphones, Botarbo,
> > > S-748 96 Tobo, Sweden.
> > > Phone & fax int + 295 310 01
> > > email: telinga@
> > > website: www.telinga.com
> > >
> >
> >
> >
> >
> >"Microphones are not ears,
> >Loudspeakers are not birds,
> >A listening room is not nature."
> >Klas Strandberg
> >Yahoo! Groups Links
> >
> >
> >
>
> Telinga Microphones, Botarbo,
> S-748 96 Tobo, Sweden.
> Phone & fax int + 295 310 01
> email: 
> website: www.telinga.com
>






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