Yes, a transformer helps saving a few mA from the batteries. A disadvantage
is that you can't connect a "raw" simple electret to most transformers,
without a buffer stage. The input impedance is too low.
Klas.
At 10:25 2002-08-08 -0700, you wrote:
>Klas, you wrote,
>
>>(On the other hand I question the use of input transformers, but that is
>>another debate.)
>
>Advantages of input transformers:
>added gain =3D lower noise
>bandwidth limitation, low and high =3D won't pass DC or RF
>no series capacitors on input =3D better balancing (not a problem in field=
)
>
>Disadvantages of input transformers:
>cost
>bandwidth limitation, low and high
>sensitivity to ambient hum fields (not a problem in field)
>
>Do you have other points to add?
>
>-Dan Dugan
>
>
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