ECC81/12AT7 (1344) - TELEFUNKEN DIAMOND BASE
GM = 4.78 & 5.02 mA/V
Mu = 62.5 & 58.8
HEALTHY EMISSION
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12AT7/ECC81 DATASHEET NOMINAL @ 250V/-2V IS 10mA PLATE CURRENT & ~ 5.5mA/V GM AND 60 Mu