GB711114A - Improvements in or relating to thermionic valves - Google Patents

Improvements in or relating to thermionic valves

Info

Publication number
GB711114A
GB711114A GB20026/52A GB2002652A GB711114A GB 711114 A GB711114 A GB 711114A GB 20026/52 A GB20026/52 A GB 20026/52A GB 2002652 A GB2002652 A GB 2002652A GB 711114 A GB711114 A GB 711114A
Authority
GB
United Kingdom
Prior art keywords
grid
grids
screen
heptode
cathode
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
GB20026/52A
Inventor
Walter William Wright
Peter Welch
Dennis Arthur Day
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Priority to BE521975D priority Critical patent/BE521975A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB20026/52A priority patent/GB711114A/en
Priority to US372011A priority patent/US2815464A/en
Publication of GB711114A publication Critical patent/GB711114A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
    • H03D7/10—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between different pairs of electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/20—Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/003—Tubes with plural electrode systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

711,114. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. Aug. 8, 1952, No. 20026/52. Drawings to Specification. Class 39(1) [Also in Group XL(c)] A frequency-changer thermionic heptode valve comprises a cathode, an anode, and grids arranged between the cathode and anode in the following order: a signal grid adjacent the cathode,. a first screen grid, a local oscillator injection grid, and a second and a third screen grid, the grids being positioned and dimensioned so that with the three screen grids joined together the valve has hexode characteristics with high conversion conductance and high conversion impedance. Preferably the heptode is combined with a triode in the same envelope, the grid of the triode being connected internally to the local oscillator injection grid; the three screen grids may be connected together inside the valve. As compared with a known heptode, the pitch of the first grid and the pitch and minor axis of the third grid may be altered so that the grids may be used in the desired manner. The conversion impedance may be 1.55 megohms and the conversion conductance 865 ÁA/V.
GB20026/52A 1952-08-08 1952-08-08 Improvements in or relating to thermionic valves Expired GB711114A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE521975D BE521975A (en) 1952-08-08
GB20026/52A GB711114A (en) 1952-08-08 1952-08-08 Improvements in or relating to thermionic valves
US372011A US2815464A (en) 1952-08-08 1953-08-03 Electron discharge device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20026/52A GB711114A (en) 1952-08-08 1952-08-08 Improvements in or relating to thermionic valves

Publications (1)

Publication Number Publication Date
GB711114A true GB711114A (en) 1954-06-23

Family

ID=10139130

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20026/52A Expired GB711114A (en) 1952-08-08 1952-08-08 Improvements in or relating to thermionic valves

Country Status (3)

Country Link
US (1) US2815464A (en)
BE (1) BE521975A (en)
GB (1) GB711114A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263108A (en) * 1963-09-25 1966-07-26 Rca Corp Electron discharge tube having a diode built therein
US3541241A (en) * 1968-09-11 1970-11-17 Rca Corp Circuit for eliminating spurious modulation of the subcarrier frequency oscillator in a color television receiver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE409171A (en) * 1934-05-15
US2125003A (en) * 1934-08-24 1938-07-26 Harries John Henry Owen Electron discharge tube circuits
GB487627A (en) * 1937-05-04 1938-06-23 M O Valve Co Ltd Improvements in thermionic multi-grid valves
US2383345A (en) * 1942-09-15 1945-08-21 Rca Corp Reflex converter circuit

Also Published As

Publication number Publication date
US2815464A (en) 1957-12-03
BE521975A (en)

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