GB245829A - Improvements in wireless transmitters - Google Patents

Improvements in wireless transmitters

Info

Publication number
GB245829A
GB245829A GB24262/24A GB2426224A GB245829A GB 245829 A GB245829 A GB 245829A GB 24262/24 A GB24262/24 A GB 24262/24A GB 2426224 A GB2426224 A GB 2426224A GB 245829 A GB245829 A GB 245829A
Authority
GB
United Kingdom
Prior art keywords
valve
anode
absorption
voltage
master oscillator
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
GB24262/24A
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.)
Individual
Original Assignee
Individual
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 NL17655D priority Critical patent/NL17655C/xx
Application filed by Individual filed Critical Individual
Priority to GB24262/24A priority patent/GB245829A/en
Priority to FR599942D priority patent/FR599942A/en
Priority to US61556A priority patent/US1819596A/en
Publication of GB245829A publication Critical patent/GB245829A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/04—Modulator circuits; Transmitter circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Domestic Plumbing Installations (AREA)
  • Amplifiers (AREA)
  • Particle Accelerators (AREA)

Abstract

245,829. Davis, N. E., and Ditcham, W. T. Oct. 13, 1924. Thermionic modulating systems.-In a transmitting system comprising intermediate and power amplifiers energized by a master oscillator, wherein the anode voltage is derived from a common source, modulation is effected by controlling the voltage drop across a resistance inserted in such a position that the anode current of the independent-drive valve, or the intermediate amplifier, passes through it, though the anode supply to the power amplifier does not. As shown in the Figure, a master oscillator circuit D supplies intermediate and power amplifiers VI, V2. A resistance R1 in the plate circuit of the valve VI is shunted by one or more absorption valves V3, the grid potential of which is varied by means of a key F, and batteries B1, B2. When the absorption valve is made conductive the potential drop across R1 reduces the anode voltage of the valve V1 to such an extent as to stop oscillations in the aerial A. Meanwhile the load across the generator G is taken up by the absorption valve V3, thus preventing voltage surges during signalling. The valve V3 may be replaced by a suitable switch having a sufficiently high current-carrying capacity.
GB24262/24A 1924-10-13 1924-10-13 Improvements in wireless transmitters Expired GB245829A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL17655D NL17655C (en) 1924-10-13
GB24262/24A GB245829A (en) 1924-10-13 1924-10-13 Improvements in wireless transmitters
FR599942D FR599942A (en) 1924-10-13 1925-06-12 Improvements to wireless transmitters
US61556A US1819596A (en) 1924-10-13 1925-10-09 Wireless transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24262/24A GB245829A (en) 1924-10-13 1924-10-13 Improvements in wireless transmitters

Publications (1)

Publication Number Publication Date
GB245829A true GB245829A (en) 1926-01-13

Family

ID=10208951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24262/24A Expired GB245829A (en) 1924-10-13 1924-10-13 Improvements in wireless transmitters

Country Status (4)

Country Link
US (1) US1819596A (en)
FR (1) FR599942A (en)
GB (1) GB245829A (en)
NL (1) NL17655C (en)

Also Published As

Publication number Publication date
US1819596A (en) 1931-08-18
NL17655C (en)
FR599942A (en) 1926-01-25

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