GB297507A - Improvements in or relating to radio receiving arrangements - Google Patents

Improvements in or relating to radio receiving arrangements

Info

Publication number
GB297507A
GB297507A GB1689227A GB1689227A GB297507A GB 297507 A GB297507 A GB 297507A GB 1689227 A GB1689227 A GB 1689227A GB 1689227 A GB1689227 A GB 1689227A GB 297507 A GB297507 A GB 297507A
Authority
GB
United Kingdom
Prior art keywords
oscillator
condenser
relating
radio receiving
heterodyne
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
GB1689227A
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.)
WILLIAM LINDSAY MCPHERSON
STC PLC
Original Assignee
WILLIAM LINDSAY MCPHERSON
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
Application filed by WILLIAM LINDSAY MCPHERSON, Standard Telephone and Cables PLC filed Critical WILLIAM LINDSAY MCPHERSON
Priority to GB1689227A priority Critical patent/GB297507A/en
Publication of GB297507A publication Critical patent/GB297507A/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
    • H03D7/08—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 the same two electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

297,507. Standard Telephones & Cables, Ltd., and McPherson, W. L. June 24, 1927. Thermionic heterodyne receivers.-The local oscillator 0 of a heterodyne or superheterodyne receiving system is provided with a grid leak resistance 14 and condenser 15 having such values as to maintain the voltage induced by the oscillator into the coupling coil 2 constant over the whole frequency range of the oscillator. The separate valve D which is used to detect the resulting beat note is thus enabled to operate at maximum efficiency throughout that range. The frequency of the oscillator output is determined by the circuit 4, 8, 11, the plate coil being divided into two parts by a condenser 7. When the condenser 15 has a value of 0.005 mfds., the resistance 14 is approximately 12000 ohms.
GB1689227A 1927-06-24 1927-06-24 Improvements in or relating to radio receiving arrangements Expired GB297507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1689227A GB297507A (en) 1927-06-24 1927-06-24 Improvements in or relating to radio receiving arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1689227A GB297507A (en) 1927-06-24 1927-06-24 Improvements in or relating to radio receiving arrangements

Publications (1)

Publication Number Publication Date
GB297507A true GB297507A (en) 1928-09-24

Family

ID=10085563

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1689227A Expired GB297507A (en) 1927-06-24 1927-06-24 Improvements in or relating to radio receiving arrangements

Country Status (1)

Country Link
GB (1) GB297507A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740371C (en) * 1936-05-14 1943-10-19 Telefunken Gmbh Short wave superposition receiver with self-oscillating mixing tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740371C (en) * 1936-05-14 1943-10-19 Telefunken Gmbh Short wave superposition receiver with self-oscillating mixing tube

Similar Documents

Publication Publication Date Title
US2333990A (en) Tuning indication system
GB297507A (en) Improvements in or relating to radio receiving arrangements
GB540999A (en) Improvements relating to the measurements of distance by the comparison of transmitted and reflected radio waves
GB415464A (en) Improvements in thermionic valve oscillation generators
US2520419A (en) Frequency-modulation demodulator
GB435417A (en) Detector arrangement for wireless receivers, more particularly for television purposes
GB557083A (en) Improvements in and relating to means for reducing noise in radio receivers
GB648925A (en) Improvements in or relating to discharge-tube oscillator circuits
GB433924A (en) Improvements in or relating to electron tube generators
GB285157A (en) Improvements in or relating to thermionic valve circuits
GB238003A (en) Improvements in and relating to thermionic valve circuits
GB488566A (en) Improvements in superheterodyne receivers
GB394178A (en) Radio receiving arrangement
GB431599A (en) Improvements in short-wave valve oscillators
GB415078A (en) Improvements in radio receiving apparatus
GB405175A (en) An improved method of introducing a local oscillator voltage in the grid circuit of the frequency changer of a super-heterodyne radio receiver
GB366094A (en) Improvements in or relating to vacuum tube electrical oscillation generators
GB414836A (en) Improvements in or relating to thermionic oscillation-generators and the like
GB456074A (en) Improvements in detecting circuits for radio receiving systems
GB607027A (en) Improvements in or relating to superheterodyne receiving arrangements
GB461983A (en) Improvements in or relating to radio receivers
GB494979A (en) Improvements in and relating to radio frequency receiving systems
GB676716A (en) Improvements in or relating to thermionic valve oscillations
GB412693A (en) Improvements in and relating to thermionic valves
GB262083A (en) Improved arrangement for the composition of two variable electric currents of any wave form and frequency