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331C and 331 power supply differences

The 331C have a different AC power supply than the older 331's, they cannot be mixed.

The 331C uses a 12VDC adapter and the 331 uses a 5VDC adapter.

The pins of the adapters are polarized differently.
 331C uses the SE30-277 power supply only

earlier 331 used the SE30-45 only

***Use of the wrong AC Adapter will damage an instrument.

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