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Sep 14, 2018 Philippe Maliet
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Tektronix 310 A oscilloscope. Very compact oscilloscope for on-site maintenance. Mass: 10. 7 kg 1 channel Release date: 1956; Price $ 735. Still in the 1969 Tektronix catalog Power consumption: 175 W Bandwidth = 3.5 MHz Note a calibrator that is a square wave generator at 1 kHz adjustable between 50 mV and 100 V. Note the high quality cabling on porcelain lugs.
Topics: Tektronix, scope, 3101A
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Sep 14, 2018 Philippe Maliet
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Rack with 2 units of 8-inch floppy drives. 19-inch rack. Maximum capacity: 1.2 MB. Manufacturer: Intel. Date: Circa 1975 Note the very rigid structure in cast aluminum and the quality of the mechanics. Old technology motors: alternating current at 50 Hz  and direct current. Main power supply with big transformer old technology power supply at 50 Hz frequency without switching.
Topics: Floppy, 8 inches, Intel
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Sep 14, 2018 Philippe Maliet
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Mechanical part of an old-generation barcode reader. Polygonal metallic mirror (5 faces) transforming a rotation at constant speed into a scanning. Date: Circa 1980 Light source: neon Helium laser. Note the optical alignment by a reflector placed on a plane and oriented by 3 screws.
Topics: barcode, polygonal mirror, scanning
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Sep 14, 2018 Philippe Maliet
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Old computer memory with principle of propagation of ultrasonic waves in a metallic delay line.  Circulating memory with magneto-strictives transducers. Capacity = 10 kbits. Implemented in first experimental version of electronic public switching exchange E10A of Alcatel / CNET in France. (Brittany) Date : Circa 1975. Constraints : Temperature must be controlled with a better precision than 1°C; if not this circulating memory was unsynchronised. Competing technology : Ferrite core memory.
Topics: magnetostrictive, ultrasonic, delay line, circulating memory
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Sep 3, 2018 Philippe Maliet
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Air Variable capacitor Structure distributed with 2 mechanically coupled cages:  1) Tuning and  2) Preselector Manufacturer: ARENA Date : circa 1960 Precision mechanics on ball bearings anti microphonic Application: radio receiver for BCL : radio Broad Cast Listeners. Commercial leaflet from Arena
Topics: BCL, capacitor, tuning, preselector
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Analog Digital Converter (ADC) printed card for a spectrum analyser. Model 3571A from Hewlett Packard. Manufactured : 1978 in USA. PCB (Printed Card Board) listed as A22. Main components :  -High precision R/2R : Array of thin film of Nickel Chrome resistors on glass, array of thick film resistors,  -Active discrete components such as bipolar transistors, glass diodes,  -Actives Integrated components such as Medium Scale Integrated (MSI) ; Transistor Transistor Logic (TTL) series. PCB made...
Topics: ADC, PCB, FR4, TTL, MSI
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Sep 3, 2018 Philippe Maliet
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Toroids ferrite core memory. Type / model : 4K8A 4200 From main frame : Logabax  Nationality : French  Capacity : 4 kO. Operating system : COBOL Manufacturing date = 1975 Scanner : Agfa SnapScan 1212U 600 dpi.
Topics: Core, ferrite, COBOL, Logabax, memory, 4k, toroid
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Sep 3, 2018 Philippe Maliet
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High resolution colour monitor Hewlett Packard HP A2094. C athode R ay T ube type :  TRINITRON from   SONY (Japan). Format : 19 inches. Resolution : 1280 x 1024 ; refresh rate : 72 Hz VGA connection. 15 pins connector. The front part is a cylinder. Manufacturing date : 1993 Visualisation part of system : Workstation family HP9000 model 712 / 735 with HP-UX. (Ex Apollo) Mind the mass : 32,5 kg : very heavy.
Topics: CRT, trinitritron, workstation, VGA, 19 inches, HP, A2904, Apollo, 712
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Sep 1, 2018 Philippe Maliet
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Computer room from Brown Boveri Corporation. BBC review october 1987 Volume 74. Digital Equipment Mainframes   DEC VAX 11/780 , Hard disk Units RMB0. Computation performances : 1,1 Mflops ; 32 bits words Hardware : TTL logic cards on a large back panel Memory : MOS chips ; 4 MO maximum Power supply : Required 3 phases ; 6 kVA Use : General purpose Main Frame during the eighties.
Topics: Computer, Main Frame, DEC, VAX 11/780, Brown Boveri