157-0053-00: Difference between revisions

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#redirect[[12BY7A]]
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.
 
==Selected part use==
*[[531]]
*[[533]] (V504 & V524)
*[[535]]
*[[536]]
*[[541]]
*[[543]]
*[[545]]
*[[555]]
 
[[Category:Pentodes]]
[[Category:Selected Tubes]]

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.

Selected part use