SIST HD 145 S1:2004

Numbering of electrodes and designation of units in electronic tubes and valves

Applies to multi-electrode tubes, with the exception of cathode-ray tubes. Describes the system used for numbering the electrodes of the same type multi-electrode tubes and for assigning designations to the units of multiple-unit tubes.

Numerierung der Elektroden und Bezeichnung der Systeme an Elektronenröhren

Numérotation des électrodes et désignation des sections des tubes électroniques

Applicable aux tubes à plusieurs électrodes à l'exception des tubes à rayons cathodiques. Donne la méthode utilisée pour numéroter les électrodes de même type des tubes à plusieurs électrodes et pour désigner les sections des tubes à plusieurs sections.

Numbering of electrodes and designation of units in electronic tubes and valves

General Information

• Status: Published
• Publication Date: 30-Jun-2004
• ICS: 31.100 - Electronic tubes
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2004
• Due Date: 01-Jul-2004
• Completion Date: 01-Jul-2004
• Ref Project: HD 145 S1:1977 - Numbering of electrodes and designation of units in electronic tubes and valves

Overview

HD 145 S1:1977 (CLC) - Numbering of electrodes and designation of units in electronic tubes and valves - defines a consistent system for identifying electrodes and units in multi‑electrode and multi‑unit electronic tubes (excluding cathode‑ray tubes). The recommendation describes how to number electrodes of the same type within a tube and how to assign unit designations in multiple‑unit tubes, with rules tied to the basing (pin) arrangement and proximity to the cathode.

Key topics and requirements

• Scope: Applies to multi‑electrode tubes and valves except cathode‑ray tubes; also applies to related elements such as heaters and shields.
• Electrode numbering (single‑unit tubes):
  • Multiple electrodes of the same type are numbered consecutively starting from the electrode closest to the cathode (e.g., grid 1 is nearest the cathode, grid 2 is next outward).
  • Co‑planar or same‑distance electrodes acting on the same electron stream are distinguished by suffixes A, B (e.g., grid 1A, grid 1B).
• Electrode numbering (multiple‑unit tubes):
  • For similar units each containing multiple electrodes, apply the single‑unit numbering method to each unit.
• Unit designation in multiple‑unit tubes:
  • If units are different, name each unit by the type it would have as a single unit (e.g., diode, triode, pentode).
  • When numbering similar units (e.g., twin diodes), assign the highest unit number to the unit whose independent electrode connects to the lowest‑numbered base pin, then proceed by increasing pin numbers.
  • If units share electrode(s), use the independent electrode connected to the lowest‑numbered pin to determine unit numbering.
  • Unit numbers, once assigned, apply to all independent electrodes of that unit.
• Designation format: Unit designations may be associated with electrode designations by words or symbols in any convenient manner.

Applications and users

• Practical for:
  • Tube designers and manufacturers (pinout documentation, basing decisions)
  • Test laboratories and quality assurance (consistent identification for test reports)
  • Repair technicians and restoration specialists (schematics, wiring, replacement)
  • Technical authors, datasheet publishers, and standards committees
• Benefits:
  • Ensures unambiguous tube pinouts and electrode references
  • Simplifies interchangeability, documentation and international collaboration

Related standards

• Originates from IEC Technical Committee work on electronic tubes (referenced in the original IEC recommendation). The document header also references IEC numbering used in related recommendations (see IEC publications on electronic tubes and valves for complementary guidance).

Keywords: HD 145 S1:1977, electrode numbering, designation of units, multi‑electrode tubes, electronic tubes, valves, tube pin numbering, multi‑unit tubes.

Standards Content (Sample)

SLOVENSKI SIST HD 145 S1:2004
STANDARD
julij 2004
Numbering of electrodes and designation of units in electronic tubes and valves
ICS 31.100 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
Première édition
STAN
DARD
First edition
1961-01
Numérotation
des électrodes et désignation
des sections des tubes
électroniques
Numbering of electrodes and designation
of units in electronic tubes and valves
© IEC 1961 Droits de reproduction
réservés — Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit
et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris
la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de
l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
E
PRICE CODE
International Electrotechnical Commission
IEC MeeayHapoimaa
3neKTpoTexHHVecnaa KoMHCCHc
Pour prix, voir catalogue en vigueur
•
For price, see current catalogue

CONTENTS
Page
FOREWORD 5
PREFACE 5
Clause
1. Scope and object 7
2. Numbering of electrodes in single-unit tubes and valves 7
3. Numbering of electrodes in multiple-unit tubes and valves 7
4. Designation of units in multiple-unit tubes and valves 7

INTERNATIONAL ELECTROTECHNICAL COMMISSION
NUMBERING OF ELECTRODES AND DESIGNATION OF UNITS IN
ELECTRONIC TUBES AND VALVES
FOREWORD
1) The formal decisions or agreements of the I.E.C. on technical matters, prepared by Technical Committees on which
all the National Committees having a special interest therein are represented, express, as nearly as possible, an inter-
national consensus of opinion on the subjects dealt with.
2) They have the form of recommendations for international use and they are accepted by the National Committees in
that sense.
3) In order to promote this international unification, the I.E.C. expresses the wish that all National Committees having
as yet no national rules, when preparing such rules, should use the I.E.C. recommendations as the fundamental basis
for these rules in so far as national conditions will permit.
4) The desirability is recognized of extending international agreement on these matters through an endeavour to harmonize
national standardization rules with these recommendations in so far as national conditions will permit. The National
Committees pledge their influence towards that end.
PREFACE
This recommendation has been prepared by Technical Committee No. 39. Electronic tubes and valves.
Following a discussion of documents on the subject of the numbering of the electrodes and the
designation of the units in electronic tubes and valves at a meeting held in Madrid in July 1959. a draft
was submitted to the National Committees for approval under the Six Months' Rule in May 1960.
The following countries voted explicitly in favour of publication:
Austria Netherlands
Belgium Portugal
Canada Romania
Czechoslovakia Sweden
Denmark Switzerland
France Union of Socialist Soviet Republics
Germany United Kingdom
Israel United States of America
Italy
NUMBERING OF ELECTRODES AND DESIGNATION OF UNITS IN
ELECTRONIC TUBES AND VALVES
Scope and object
1.
This recommendation applies to multi-electrodes tubes and valves, with the exception of cathode-ray
tubes.
...