Markings are faint
Sylvania made in USA
ac aea
Can't find it anywhere
7 pins?
looks like an el84 type
>>58757710
9 pins
Heater is on 4 and 5
>>58757761
Doesn't look like it
Sylvania 10bq5 maybe?
>>58757881
another name for a el84
>>58757881
Those have a different envelope and longer shielding >>58757934
ask /diy/ there's an electronics general there
Ok
i'll try with 6JE8, 8JE8 or 11JE8
>>58758006
>11JE8
they pretty close