GB270734A - Improvements in high frequency signalling systems - Google Patents

Improvements in high frequency signalling systems

Info

Publication number
GB270734A
GB270734A GB12080/27A GB1208027A GB270734A GB 270734 A GB270734 A GB 270734A GB 12080/27 A GB12080/27 A GB 12080/27A GB 1208027 A GB1208027 A GB 1208027A GB 270734 A GB270734 A GB 270734A
Authority
GB
United Kingdom
Prior art keywords
grid
units
thermionic
transmitting circuit
signalling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB12080/27A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB270734A publication Critical patent/GB270734A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/22—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with tubes only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

270,734. British Thomson-Houston Co., Ltd., (Assignees of Baker, TV. R. G.). May 5, 1926, [Convention date]. Thermionic amplifiers and generaotrs ; keying systems.-A high-frequency signalling system has a plurality of amplifying units excited from a source of high-frequency current 2, and an independent coupling between each unit and a transmitting circuit 1, so that if one or more units are removed from the system no change in tuning is necessary. Each amplifying unit consists of a pair of thermionic valves 3, 4 or 5, 6 connected in push-pull relation and having independently tuned output circuits 11, 13, 14 and 12, 15, 16 respectively, independently coupled through coils 17, 18 to the transmitting circuit. Tuned trap circuits 21, 21<1> are provided between a high-tension main 19 and each amplifier unit to prevent reaction between the units. Grid-biasing potentials are obtained by thermionic rectifiers 22, 24 supplied with alternating current by transformers 23, 25. The grid-bias of the oscillating valve 2 is normally of such a value that no oscillations are produced and signalling is effected by a relay 26 closing a shunt circuit round a grid condenser 27 and resistance 28.
GB12080/27A 1926-05-05 1927-05-05 Improvements in high frequency signalling systems Expired GB270734A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US270734XA 1926-05-05 1926-05-05

Publications (1)

Publication Number Publication Date
GB270734A true GB270734A (en) 1927-08-11

Family

ID=21835535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12080/27A Expired GB270734A (en) 1926-05-05 1927-05-05 Improvements in high frequency signalling systems

Country Status (1)

Country Link
GB (1) GB270734A (en)

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