On Thu, Feb 17, 2022 at 05:24 PM, Dave Wise wrote:
My manual scan covers serial numbers from the beginning to at least 10760.
During that time, the 130 used a 6BH6 for V110, Guard Voltage Cathode
Follower. It was always a 6BH6 and nothing else was ever a 6BH6. The V70
Multivibrator has always been a 6U8. The V76 Clamp Tube is ¡°Use 6DJ8¡± so
early instruments were probably 6BQ7, an older dual triode that Tek globally
replaced with 6DJ8 because the latter is more reliable.
Printed on chassis of S/N 8069: "V76 6DJ8/6922 6BQ7A".
Albert
