FR688979A - Improvements to thermionic amplifiers for electric phonographs and similar devices - Google Patents

Improvements to thermionic amplifiers for electric phonographs and similar devices

Info

Publication number
FR688979A
FR688979A FR688979DA FR688979A FR 688979 A FR688979 A FR 688979A FR 688979D A FR688979D A FR 688979DA FR 688979 A FR688979 A FR 688979A
Authority
FR
France
Prior art keywords
similar devices
thermionic amplifiers
phonographs
electric
electric phonographs
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
Other languages
French (fr)
Inventor
Norman William Mac Lachlan
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 filed Critical
Application granted granted Critical
Publication of FR688979A publication Critical patent/FR688979A/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
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
FR688979D 1929-01-28 1930-01-27 Improvements to thermionic amplifiers for electric phonographs and similar devices Expired FR688979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB688979X 1929-01-28

Publications (1)

Publication Number Publication Date
FR688979A true FR688979A (en) 1930-09-01

Family

ID=10493022

Family Applications (1)

Application Number Title Priority Date Filing Date
FR688979D Expired FR688979A (en) 1929-01-28 1930-01-27 Improvements to thermionic amplifiers for electric phonographs and similar devices

Country Status (1)

Country Link
FR (1) FR688979A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682037A (en) * 1950-09-08 1954-06-22 Bell Telephone Labor Inc Equalizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682037A (en) * 1950-09-08 1954-06-22 Bell Telephone Labor Inc Equalizer

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