Hi Rob,
Yes, the SONY Hi-MD recorders (and the KORG MR-1000 with its high noise flo=
or despite of the eight AA batteries) are exceptions.
Supply voltage converters could be used to address this issue, but they wou=
ld unfortunately also reduce the battery life, which seems to be the reason=
why this option is not being used in the smaller pocket recorders.
Regards,
Raimund
Rob wrote:
> Interesting rule of thumb. An exception would be the Hi-MD units
> that operate on one AA, 1.5 volt battery. Can a voltage upverter be
> used? And the phantom circuits can cause fits too. Rob D.
>
> =3D =3D =3D =3D =3D
>
>
> At 3:15 PM +0000 4/8/10, Raimund wrote:
> >Yep,
> >
> >These findings support the general rule of thumb that the preamp
> >noise performance of a recorder is primarily determined by its
> >supply voltage or the size of its batteries (assuming that the
> >designers did not made a major mistake). Once the supply voltage is
> >at least about 6 volts, it is relatively easy for the designers to
> >select suited low-noise op amps.
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