[sdiy] MN30XX, MN32XX differences (was CA3080 deal on Ebay)

[scottnoanh at peoplepc.com]

> MN3207's are from the low-voltage family.
>
> MN3007's are the equivalent high-voltage part number.

It should be noted that the MN32XX is not only the low voltage equivalent of
the MN30XX, but it is also powered by opposite Vdd polarity.  MN32XX is
N-channel, MN30XX is P-channel, if I'm not mistaken.  I'm  assuming Bob
modified the circuit to accommodate this.  If he didn't, I'm surprised the
smoke fairy didn't show up.

I've used Visual Sound and Panasonic MN3207/MN3102 interchangeably.  I've
not noticed a difference between the two.  I'm assuming Visual sound devices
are custom labeled Shanghai Belling stock.