A set of four tubes all 12FQ8 by RCA for Wurlitzer date code 1961 43rd week. These are all reading 88-90% on my BK 667 tube tester where the highest reading for this tube is 90%. Both sides are matching within 1%.
A set of four tubes all 12FQ8 by RCA for Wurlitzer date code 1961 43rd week. These are all reading 88-90% on my BK 667 tube tester where the highest reading for this tube is 90%. Both sides are matching within 1%.