-40%
2 Hammond Mullard Amperex 7247 tested strong
2 Hammond Mullard Amperex 7247 tested strong
2 Hammond Mullard Amperex 7247 tested strong
2 Hammond Mullard Amperex 7247 tested strong
2 Hammond Mullard Amperex 7247 tested strong
2 Hammond Mullard Amperex 7247 tested strong
2 Hammond Mullard Amperex 7247 tested strong

2 Hammond Mullard Amperex 7247 tested strong

$ 15.83

Availability: 63 in stock
  • Condition: Used
  • Brand: Mullard
  • Type: 12Au7
  • Model: tung sol Leslie 6550

    Description

    Tested strong on my Hickok 539B , no shorts, very strong on life expectancy test as well
    Mullard or Amperex I don't know
    2 different plates to measure and they are very different bias voltages so the readings are not similar like a 12AX7 or something
    Minimum reading on test are well above, almost 2x what is needed for a good tube