05-22-2018, 09:17 PM
The 7xx series tubs were actually 6.3v, same as their 6xx octal brethren... Same for 14 volt actually 12.6... For awhile Sylvania did list the 7xx as 7v but that idea was shelved in either late 40s or early 50s...
Except for 7A8, the 7xx tubes should have same basing as 14xx so that schematic should be useable...
Except for 7A8, the 7xx tubes should have same basing as 14xx so that schematic should be useable...
Tom
