Hi Hector
Just checking, you have turned the phantom power off
have you on the FR2 LE? As that could cause problems.
Wiring the earth / screened to both pins 1 and 3
should not cause problems, unless the input is not
transformer balanced but electronically balanced. But
I would have thought that the FR2 LE had transformers
on its input.
I wire my unbalanced microphones the way I outlined
and I have not had any problems.
If I am wiring up the balanced output of an
electronically balanced unit to work into an
unbalanced device then you only use pins 2 and 1
leaving pin 3 floating.
Phil
--- Hector Centeno <> wrote:
> Hello,
>
> Thank you for your responses. Yes, I'm aware that
> the 1/4 inputs in
> the FR-2LE are line level so the first thing I did
> was to use a 1/4
> inch to XLR adapter to plug the AT-822 1/4 outputs
> (which basically
> does what Phil suggested: hot to pin 2, ground to
> pin 1 and 3) but to
> my surprise I got a loud noise interference
> (buzzings that seem to
> come from the electronic circuits) mixed with the
> audio signal. So
> following this advice
> http://www.dplay.com/dv/balance/balance.html#cross I
> built a
> 1/4-female to XLR-male cable soldering the hot (red)
> wire to pin 2 and
> the ground (white) to pin 3 leaving pin 1
> disconnected. Now there is
> no noise! But if I touch the connector on the 1/4
> end (which is
> metallic) I get a soft ground hum. Any suggestions?
>
> Cheers,
>
> Hector
>
>
> On Feb 11, 2008 1:19 PM, oryoki2000
> <> wrote:
> >
> >
> >
> >
> >
> >
> > Hector,
> >
> > I think you'll have to convert your mic cables to
> XLR, and not because
> > of the balanced vs unbalanced signal issue.
> >
> > Page 42 of the FR-2LE manual describes the analog
> inputs
> >
> > "These connectors are "combo" type (both 1/4" and
> XLR) and can connect
> > an external microphone via the XLR connector or
> an external line level
> > source via the 1/4" connector."
> >
> > On page 50, the manual says
> >
> > "The XLR connection accepts an analog signal
> between -50 dBu and -10
> > dBu...the phone plug accepts a -10 dBV analog
> audio signal."
> >
> > -10 dBV is equivalent to -7.78 dBu
> >
> > This says to me that the 1/4" inputs won't work
> well with a microphone
> > unless the audio source is extremely loud (rock
> band, plane taking
> > off, huge crashing waves, etc.)
> >
> > To test this idea, I found an inexpensive Radio
> Shack mic with 1/4"
> > output in a drawer. I plugged it into my FR-2LE
> and started
> > recording. I had to talk in a very loud voice, a
> shout almost, to
> > register a signal.
> >
> > So the 1/4" input is probably not the right
> choice if you're trying to
> > capture a natural ambience. It might be just
> right to record steam
> > locomotives, however!
> >
> > --oryoki
> >
> >
>
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