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Re: FEL 3.5 Series Preamps

Subject: Re: FEL 3.5 Series Preamps
From: "Nick Roast" <>
Date: Mon, 01 Sep 2003 08:41:09 -0000
--- In  Dan Dugan <> wrote:
> Nick Roast wrote:
> >we manafacture
> >and market these preamps in the UK. (they are also available in the US
> >from
> >
> >These mic pre's work by boosting the mic signal by 20dB and working
> >into the 3.5mm mic socket of domestic recorders.
> >They draw their power from this socket (plug in power).
> Do they pass on the plug-in-power to the microphone? It would make 
> sense for the XLR version to not do so, and the 3.5 mm version to 
> have PIP.
> -Dan Dugan

Alas the plug-in-power is not passed on to the mic, the preamp soaks
up most of the current available.  It is possible that enough current
could be passed through to polarize an electret, however there are two
problems: PIP has no specification, it varies between recorders and
similarly some mics take more current than others.  Net result the
combined performance could be compromised.  We considered the PIP mics
available and decided to play safe and not pass PIP on.

Nick Roast.

FEL Communications.


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