Vintage Electronic Calculators:

Overview of Brands


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AKA: micro Compet, AKA (Label): MODEL QT-8D, Product number (P/N): QT8D (QT-8D),
Keywords/Tags: QT8D (QT-8D) | micro Compet
Date of intro: nov-1969, Origin: Japan (List), Dimensions: 241x133x72mm, Weight: 1400g,
Power: AC,
Display: Type = Display (Itron/Digitron) (List), Brand = ISEDEN: DG10B {8x}, Digits = 8+1, Extra Display features: Type = Display (VFD tube) (List), Brand = ISEDEN: SP10, Quantity = 1,
Keyboard: Reed-switch, Number of keys: 15,
Classification: / Desktop with Display,
Featuring: Logic-technology: LSI (Large Scale Integration), calculator-chipset,
Related with: SHARP_docu: (Instr.) QT8D; SHARP_docu: (Ad.) QT8D: Breakthrough!, An electronic calculator that...; SHARP_docu: (Ad.) QT8D: Breakthrough!, Now an electronic calc. (version-1); SHARP_docu: (Ad.) QT8D: SHARP hat bestimmt jeden Rechner...; SHARP_docu: (Ad.) QT8D: The smallest, The quietest, The lightest...; SHARP_docu: (Ad.) QT8D: You need a SHARP brain for decimals! ...; SHARP_docu: (Broch.) QT8D: World's smallest electronic calculator; ROCKWELL_docu: (Ad.) When North American Rockwell shrinks a calculator...; SHARP: ELBN691; SHARP_parts: (Misc.) Measuring Tape (QT8D); SHARP_docu: (Ad.) QT8D: Ask a Micro Compet; SHARP_docu: (Ad.) *: Ask any Compet (CS661,CS662,QT8D); SHARP_docu: (Ad.) *: Ask any Compet (CS661,QT8D); SHARP_docu: (Ad.) *: Ask any Compet (QT8B,QT8D); SHARP_parts: (Box) QT8D,
Main Components: ROCKWELL: AC2261; ROCKWELL: AU2271; ROCKWELL: DC2266; ROCKWELL: NRD2256,
Other components: HITACHI: HD3103,
Resemblance with: ADDO-X: 9354; ELEKTRONIKA: 24-71; FACIT: 1115,
Serie-members: SHARP: QT8B (Version with batteries),
Known Serial-numbers: 0001031 | 0003288 | 0005575 | 0006787 | 0007324 | 0018351 | 0031213 | 0036117 | 0071283 | 0071839 (List of all S/Ns from SHARP)
Initial Cost Price: USD495.00, Collector value: 8.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Info: First LSI (Large Scale Integration) portable calculator
Internet: Link-1: CALCUSEUM, Link-2: CURTAMANIA, Link-3: THE OLD CALCULATOR MUSEUM, Link-4: SCHLEPPTOPS Rechnerwiki, Link-5: KIRCHOF Thomas
Intro-Sequence #: 14, Predecessor: SHARP: CS12A, Successor: SHARP: CS361


Display / Display (Itron/Digitron)


Display / Display (Itron/Digitron) / Internals (PCB)


Accessories / Multiple, group

Internals (keyboard)

Internals (power supply)

Internals (PCB)

Catalogue (fragment)

Label, name plate / Rear

Label, name plate
S/N: 0007324

Label, name plate
Assembled using ISO metric screws, bolts & nuts

Label (inspection)
F.H. M.U.

Switch (voltage selection)

Created: 20-oct-2015, Manual-update: 19-jul-2020, Batch-update: 16-sep-2022             

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15 Pic(s),


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