157-0053-00: Difference between revisions
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The '''157-0053-00''' denotes a matched pair of [[12BY7]](A) ([[154-0047-00]]) pentodes. | The '''157-0053-00''' denotes a matched pair of [[12BY7]](A) ([[154-0047-00]]) pentodes. The matched pair is found in the vertical input stage of many early [[500-series scopes]]. | ||
==Matching Conditions== | ==Matching Conditions== | ||
Latest revision as of 06:17, 25 June 2024
The 157-0053-00 denotes a matched pair of 12BY7(A) (154-0047-00) pentodes. The matched pair is found in the vertical input stage of many early 500-series scopes.
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.