(!!) (1 set of 10 tubes) 404A Western Electric used/good 1963-1967 (set of 10)

1 set of 10 tubes) 404A Western Electric used/good 1963-1967

1 tube) 25.0ma Gm=11,000 (1965)

1 tube) 17.2ma Gm=11,800 (1967)

1 tube) 20.6ma Gm=12,700 (1964)

1 tube) 23ma Gm=15,500 (1963)

1 tube) 19.2ma Gm=12,400 (1965)

1 tube) 20.5ma Gm=14,000 (1967)

1 tube) 20ma Gm=14,000 (1963)

1 tube) 19.4ma Gm=11,000 (1963)

1 tube) 20ma Gm=12,400 (1966)

1 tube) 18ma Gm=11,800 (1967)

Tested on Amplitrex

Vplate=150V

Vscreen=150V

Vgrid=-1.5V

Good used Ma range 12-16ma

Good used Gm range 10,500 – 12,000