157-0053-00

The 157-0053-00 denotes a matched pair of 12BY7 (154-0047-00) pentodes.

Matching Conditions

• Heater: Nominal ±2%
• Plate voltage: 150 V ±1%
• Screen voltage: 100 V ±1%
• Cathode current: 19 mA ±1%

Selection Requirements

A: Cathode bias of two tubes of a pair shall be within 50 mV.

B: Grid current shall be less than 3 μA.

Selected part use

• 531
• 533 (V504 & V524)
• 535
• 536
• 541
• 543
• 545
• 555