JPS5620398A - Electronic control tone arm - Google Patents

Electronic control tone arm

Info

Publication number
JPS5620398A
JPS5620398A JP9502179A JP9502179A JPS5620398A JP S5620398 A JPS5620398 A JP S5620398A JP 9502179 A JP9502179 A JP 9502179A JP 9502179 A JP9502179 A JP 9502179A JP S5620398 A JPS5620398 A JP S5620398A
Authority
JP
Japan
Prior art keywords
cartridge
gain
low
frequency resonance
sensitivity
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.)
Pending
Application number
JP9502179A
Other languages
Japanese (ja)
Inventor
Harushige Nakagaki
Shigeki Inoue
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9502179A priority Critical patent/JPS5620398A/en
Publication of JPS5620398A publication Critical patent/JPS5620398A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02—Arrangements of heads
    • G11B3/10—Arranging, supporting, or driving of heads or of transducers relatively to record carriers
    • G11B3/12—Supporting in balanced, counterbalanced or loaded operative position during transducing, e.g. loading in direction of traverse
    • G11B3/125—Supporting in balanced, counterbalanced or loaded operative position during transducing, e.g. loading in direction of traverse by using electric or magnetic means

Abstract

PURPOSE:To suppress the low-frequency resonance of any cartridge equally by controlling the gain of a feedback system in accordance with the sensitivity of the cartridge. CONSTITUTION:A low-frequency resonance frequency accompanying the turning of record 8 is detected by cartridge 12 and this detection output is amplified by AC amplifier 4 by way of LPF3; and the output of amplifier 4 is supplied to driver 5 through gain change-over unit 14 to drive electromagnet 10, and consequently suction force and repulsive force are generated between the electromagnet and permanent magnet 9 to damp tone arm 1, thereby suppressing low-frequency resonance. Here, a rotary switch is used for unit 14 and this rotary switch changes contacts of electromagnet 10 with several contacts so as to control the gain of driver 5. For an MM cartridge high in sensitivity, the contact of switch 14 is connected to 1 to lower the gain of drivers 5 and for an MC cartridge low in sensitivity, the contact is connected to 4 to increase the gain of driver 5, so that both the cartridges can have the same suppression effect for low-frequency resonance.
JP9502179A 1979-07-27 1979-07-27 Electronic control tone arm Pending JPS5620398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9502179A JPS5620398A (en) 1979-07-27 1979-07-27 Electronic control tone arm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9502179A JPS5620398A (en) 1979-07-27 1979-07-27 Electronic control tone arm

Publications (1)

Publication Number Publication Date
JPS5620398A true JPS5620398A (en) 1981-02-25

Family

ID=14126397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9502179A Pending JPS5620398A (en) 1979-07-27 1979-07-27 Electronic control tone arm

Country Status (1)

Country Link
JP (1) JPS5620398A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57147101A (en) * 1981-03-06 1982-09-10 Hitachi Ltd Tone arm system for player
WO2012011799A2 (en) 2010-07-19 2012-01-26 Rl Finance B.V. System and method for thermal cracking of a hydrocarbons comprising mass
JPWO2021229841A1 (en) * 2020-05-11 2021-11-18

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57147101A (en) * 1981-03-06 1982-09-10 Hitachi Ltd Tone arm system for player
WO2012011799A2 (en) 2010-07-19 2012-01-26 Rl Finance B.V. System and method for thermal cracking of a hydrocarbons comprising mass
JPWO2021229841A1 (en) * 2020-05-11 2021-11-18
WO2021229841A1 (en) * 2020-05-11 2021-11-18 パナソニックＩｐマネジメント株式会社 Measurement device, measurement method, program, and phonograph record

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