[EADGBE]

I picked up an Ariston Q Deck turntable at a thrift shop recently, but
it did not come with its 12v wall AC adaptor.

The back of the unit simply says "12V DC 350mA" but gives no
indication of the polarity of the AC adaptor. I can find a 12V DC
adaptor that can supply the recommended mA output, but I want to be
sure about the polarity.

The socket for the adaptor is the standard type round hole with a male
connector in the middle.

MY QUESTION: To properly power this turntable, what polarity should I
look for in the AC adaptor's female connector---in other words, what
part of the female connector should be positive (+) and what part
should be negative (-) ?

Inside hole positive and outside sleeve negative, or the other way
round?

Many thanks in advance.........