TWO Valvo 12AU7 ECC82 Tubes. k62 D6F code =. Tested on Amplitrex AT-1000 tube tester (fixed bias mode). Valvo, Hamburg Germany 1956 JUNE. D Getter / square angle getter. Tubes test at 1850, 2130 and 1900, 1800 where 1430 micromhos is pass/fail grade.
Item Tag: Preamp Tubes 12AU7
TWO Valvo ECC82 12AU7 Tubes / k62 / 45 deg. D Getter – 1956 /Amplitrex👍 Amperex
TWO Valvo 12AU7 ECC82 Tubes. k62 D6F code =. Tested on Amplitrex AT-1000 tube tester (fixed bias mode). Valvo, Hamburg Germany 1956 JUNE. D Getter / square angle getter. Tubes test at 1850, 2130 and 1900, 1800 where 1430 micromhos is pass/fail grade.