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History of the radio manufacturer Keithley Instruments Inc.; Cleveland (OH)


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Name: Keithley Instruments Inc.; Cleveland (OH)    (USA)    
Abbreviation: keithley  
Products: others  
Summary: Keithley started building equipment for ultra-low-level voltage and current measurement, known in metrology laboratories worldwide. Today it still produces DMMs in addition to other RF and ATE equipment.

 
Founded: 1946
History: Keithley Instruments Inc. was founded in 1946 by Joseph F. Keithley in Cleveland, Ohio.
1956: First overseas distributor in Japan
1963: First overseas office in Europe
     
This manufacturer was suggested by Emilio Ciardiello.

Some models:
Ctry  Year  Name  1st Tube  Notes
USA  62  DC Tube Voltmeter 610 A     0-100 V, Precision:+/- 2%. 
USA  62  DC Tube Voltmeter 600 A     Multi-purpose electrometer and accessories.0-10 V (7 band)Precision:+/- 2%. 
USA  54  Electrometer 210     Input resistance greater than 10 exp-14 ohms, grid current below 10 exp-13 amps, drift low... 
USA  82  Multimeter 130     Vielfachmegert 130, Innenwiderstand 10 Megohm, Frequenzbereich 45 bis 500 Hz, Anzeigeart L... 
USA  82  Digital Multimeter 129     Pocket-Multimeter mit LCD-Anzeige. 25 Messbereiche - 10 Strombereiche fr Gleich- und Wechs... 
USA  80  Multimeter Autoranging DMM 168     The Keithley 168 is a verstile autoranging digital multimeter useful for measurement of AC... 
USA  84  Multimeter 169 DMM (169DMM)     The Keithley 169 Digital Multimeter has five functions: DCV (200 mV to 1000 V), DCA (200 A... 
USA  68  Differential Voltmeter 660A (6...  7025  The Keithley 660A is a differential voltmeter, which can be used as potentiometer or as VT... 

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Further details for this radio manufacturer by the members (rmfiorg):

tbn_usa_keithle_1980_logo.jpg

 
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