FR661978A - Improvements to heterodynes and combined high frequency transformers for large and small waves - Google Patents

Improvements to heterodynes and combined high frequency transformers for large and small waves

Info

Publication number
FR661978A
FR661978A FR661978DA FR661978A FR 661978 A FR661978 A FR 661978A FR 661978D A FR661978D A FR 661978DA FR 661978 A FR661978 A FR 661978A
Authority
FR
France
Prior art keywords
heterodynes
high frequency
combined high
frequency transformers
small waves
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)
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.)
RADIOELECTRIQUE DE MONTROUGE A
Original Assignee
RADIOELECTRIQUE DE MONTROUGE A
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 RADIOELECTRIQUE DE MONTROUGE A filed Critical RADIOELECTRIQUE DE MONTROUGE A
Application granted granted Critical
Publication of FR661978A publication Critical patent/FR661978A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03JTUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
FR661978D 1928-10-10 1928-10-10 Improvements to heterodynes and combined high frequency transformers for large and small waves Expired FR661978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR661978T 1928-10-10

Publications (1)

Publication Number Publication Date
FR661978A true FR661978A (en) 1929-08-01

Family

ID=9011225

Family Applications (1)

Application Number Title Priority Date Filing Date
FR661978D Expired FR661978A (en) 1928-10-10 1928-10-10 Improvements to heterodynes and combined high frequency transformers for large and small waves

Country Status (1)

Country Link
FR (1) FR661978A (en)

Similar Documents

Publication Publication Date Title
FR719837A (en) Improvements to directional shortwave antennas
FR661978A (en) Improvements to heterodynes and combined high frequency transformers for large and small waves
FR37621E (en) Improvements to heterodynes and combined high frequency transformers for large and small waves
FR625776A (en) Improvements to capacitors for high voltage
FR669152A (en) Improvements to installations producing and using electromagnetic waves
FR673695A (en) Equipment for radio broadcasting of documents
FR630204A (en) Improvements to high frequency current transformers
FR670147A (en) Improvements to high frequency currents
FR693570A (en) Improvements to the tuning circuits used for the reception of radio waves
FR702076A (en) Improvements to high frequency amplifiers
FR692556A (en) Improvements to antennas for electro-magnetic waves
FR718493A (en) Improvements to high frequency amplifiers
FR658295A (en) Improvements to frequency modifying devices for electric waves
FR679254A (en) Improvements to high frequency amplifiers
FR717490A (en) Improvements to receiving devices for electromagnetic waves
FR670820A (en) Improvements to high frequency amplifiers
FR728253A (en) Frequency meter for high frequencies
FR36826E (en) Improvements to high frequency amplifiers
FR696977A (en) Improvements to low frequency transformers
FR673877A (en) Improvements to coils interposed in high frequency conductors
FR715965A (en) High frequency synchroscopes improvements
FR625307A (en) Improvements to antennas specially designed for shortwave
FR706457A (en) Method and arrangement for frequency multiplication
FR724861A (en) New method of receiving modulated waves
FR693305A (en) Improvements to high frequency telephony and telegraphy installations