Thread: Today's Mystery Guest (RCA CTC-4)
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  #370  
Old 08-08-2015, 08:56 PM
old_coot88 old_coot88 is offline
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Yup, the whole family of 12V twin triodes (12AT7, 'AU7 'AX7, 'AY7, 'AZ7 etc) have the centertap for 6V heater operation.
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