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Singer / Friden Calculators.

These three calculators use CRT's as the display. All three have power supply problems and are not yet working.

Friden 1162 CRT based calculator. Friden 1166 CRT based calculator. Friden 132 CRT based calculator.
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Sharp Calculators.

Sharp Compet 384P programmable calculator. Close up of the Nixie display. Close up of the printer and card reader/writer.
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Olympia calculator with Nixie tubes.

Olympia calculator, front view. Has 12 display tubes that swaps between two pages (24 digits). Another Olympia ICR 412 calculator, front view. Fuzzy photo ot the Nixie's. Rear data plate.
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Panasonic Model 1200 Calculator with Nixie tubes.

Panasonic calculator, front view. Has 12 display tubes, one was broken. Inside view showing plug-in circuit boards. Boards removed showing backplane. Display board, I removed the broken Nixie (a model CD88 tube if anyone has one to spare).
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First logic board. Note the extensive use of bypass capacitors. Second logic board. Third board, has two round can IC's that mount through the board. Back side of third board.
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Victor 1400 Series Calculator w/CRT display.

This calculator uses a large CRT (5") as the display. It's working just fine. The case was badly broken during shipping but the calculator survived. I hope to make a clear plastic case for it someday.

Victor 1400 CRT based calculator, front view. Power supply board. Logic board is on the bottom, covered. Small CRT board. CRT Display showing characters.
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Tektronix Model 31 Calculator.

This calculator used the Sperry/Beckman type "Panaplex" displays. They are very readable. One display section (two digits) was not working when I received it, but I was able to obtain a replacement from Sphere.

Tektronix Model 31 Calculator. Cover off. Display circuit card. Back panel.
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Burroughs C3200 Nixie Calculator. Canon 121 Nixie Calculator.
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Monroe CR-2 punched / marked card reader.
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Tektronix Model 4051E01 ROM Expander for the 4051 computer. Two ROMs. An RS-232 adapter plug-in module.
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Misc Fun calculator stuff.

  • IME 86 transistor calculator
  • HP 9810 calculator / computer
  • HP 9830 calculator / computer (runs BASIC)

    Tektronix Terminals & Plotters.

  • Tektronix 4010, storage tube based terminal
  • Tektronix 4014, storage tube based terminal
  • Another Tektronix 4014 & DEC terminal
  • Tektronix 4114, storage tube based terminal
  • Tektronix 4662 option 31 plotter
  • Tektronix 4663 "C" size flatbed plotter

    Unknown computer panels.

    Unknown computer's front panels. Believed to come from a telephone company central office. Rear view showing wiring. Another front panel from the same system. Rear view. Connectors, look like IBM?
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    Unknown IBM computer panel. Possibly from an IBM series 700 system? Rear view of panel. From the button labels, it could be a tape controller.
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    Another unknown computer panel. Possibly from an IBM system?
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    IBM System 360 model 30 control panel. Missing a button and switch.
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    Litton Perpheral Device Simulator panel.
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    Allen Bradley 3264 Minicomputer Panel.
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    Autonetics D37 Control and Display Panel.

    Autonetics D37 Panel. Side view. Rear view showing connectors.
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    Singer Librascope Disc Memory.

    Singer Librascope Magnetic Disc Memory. Singer Librascope Magnetic Disc Memory. Cover removed showing the top circuit board. This unit was built in 1986. Another view of the assembly showing it's layered construction.
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    Label says it's 8 blocks of 8376 bits each for a grand total of 8376 bytes per head. With 100 heads (50/side), assuming they are all used for data, that's about 818 KBytes total. Backside of the top board showing cables. It's a two layer board. Bottom board. Most chips on both boards have 1985 date codes but the gold ceramic ones are from 1974. Back side of the bottom board, with blue ECO wires.
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    Both boards removed showing the top of the disk housing. Close up of a fixed head connection board. Head cover removed showing the top disk surface. Here are 25 dual heads arranged as 5x5 with one extra (clock?) They are all messed up because I removed it upside down. It took 2 hours to get them all realigned again.
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    Here's a close-up of the heads. They are attached with very fine wires. Here's the set of 25 dual heads on the bottom of the disk platter, all nicely alligned. The bottom has no extra head. The bottom of the disk platter. The two sided disc is 1/4" thick.
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    Nuclear Data Corporation Processor .

    Nuclear Data Corp. processor using transistors and core memory. Nuclear Data Corp. tape reader/punch control for above.
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    Mnemotron CAT 400B and TMC CAT 400C

    Technical Measurement Corp. CAT 400C "Computer of Average Transients" - uses transistors and core memory. Mnemotron CAT 400B - an eariler version. Mnemotron CAT 400B - rear view. Mnemotron CAT 400B - logic boards. Mnemotron CAT 400B - memory logic boards. Mnemotron CAT 400B - core memory.
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  • close-up of core
  • Memory decoder circuit card
  • back side of card

    Possibly Data I/O's first product:

    Data I/O's first product, a PROM programmer with paper tape. Close up of switches. Rear view of Data I/O.
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    Calcomp (California Computer Products) model 960 Plotter.

    Calcomp 960 Plotter. Close-up of control panel. Base with drivers.
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    Calcomp 907 Plotter Controller. Rear of controller. Inside the controller.
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  • Calcomp 907 operations manual (2.2MB .pdf)

    Sperry Univac Military CV-2342B/UYK Buffer

    If anyone knows what this Univac box was used with and what it does please email me.
    It has a great panel full of lights and switches! Many (100's) of small plug-in cards, some with flat-pack IC's.
    Sperry Univac Military CV-2342B/UYK Buffer. CV-2342B/UYK cover open.
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    Sperry Univac Military CV-2342B/UKY panel. CV-2342B/UYK cards.
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    Sperry Univac Military TS-2940(V)/UYK-7(V)Test Set, Computer Logic Unit

    Here's a test set for the UKY-7(V) computer, another nice panel!.
    Sperry Univac TS-2940(V)/UYK-7(V)Test Set. Cover open.
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    Parabam digital clock

    Parabam digital clock w/Nixies. Insides. Back.
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    Parabam digital clock circuit board. Back of circuit board.
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    Parabam digital clock without a display.

    Parabam digital clock, no display (fuzzy photo). Circuit boards using the same technology as the display version. Power Supply. Switch Panel.
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    Logic Blocks on card. Hand wired relay board. Hand wired transistors, all in nice sockets. Back side.
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    Austron Clock

    Austron 1210D-01 Crystal Clock. Austron Insides.
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    Astrodata Time Code Translator - makes a nice digital clock.

    Astrodata Model 5400. Rear panel. Rear panel I/O jacks. Inside view from top. Counter board - no IC's used here, just transistors.
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    Hewlett Packard 115BR Frequency Divider and Digital Clock

    Front view. Cover removed showing construction. Close-up which shows some capacitors that are leaking (C207, C222 etc.) Another View.
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    Instructions. Close-up of a circuit card. Rear Panel.
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    Hewlett Packard 115CR Frequency Divider and Digital Clock

    Front view. Rear Panel. Cover removed showing construction. Instructions.
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    Some other frequency standards and support products:

    HP 105B Quartz Frequency Standard. HP 103AR Quartz Frequency Standard. HP 101ER Quartz Frequency Standard. Beckman 905R WWV Receiver. HP 5260a Frequency Divider.
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    Dymec / Hewlett Packard 2401C Digital Voltmeter

    Front view, it works!. Rear Panel. Cover removed showing construction. Close-up of a circuit card. Close-up of a display card.
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    Hewlett Packard ET 4382 Diode Tester

    Front view, it works!. Inside view 1. Inside view 2.
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    Schematic of the diode tester.

    Dymec 2801A Quartz Thermometer

    Front view, it's a 6 digit Nixie display. Rear Panel, with computer interface and scale factor switches.
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    Computer Devices Inc. Miniterm terminal. Back of terminal.
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    LSI ADM3A Dumb Terminal, complete with screen rot. Cover open. Display circuit card.
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    TEC Series 400 Data Screen, rack-mount terminal. Another TEC Series 400 Data Screen, terminal. Rear Panel. Keyboard (not so clean).
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    Fabri-Tek Logi-Tran Four, Logic Trainer System. Board with RTL IC's.
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    DIGIAC, Logic Trainer System.
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    Plessey DD11/80 Cartridge Disk Drive.
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    Hewlett Packard 9845A desktop computer.
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    HP 98041A Disk Interface for the 98x5 series calculator/computers. Calculator side of the interface cable. Internal Logic Board. Rear Panel.
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    IBM 5110 Desktop Computer. Another, dirty, IBM 5110 Desktop Computer. IBM 5103 printer, used with the 5110.
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    IBM MAG CARD Selectric Typewriter. MAG CARD Electronics.
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    HP 1351A Graphics Translator. 1351A rear View. HP 1311B X-Y display, used with 1351A.
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    Texas Instruments RS-232 analyzer, breakout box.
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    Analogic AP500 Floating Point Array Processor. Rear Panel. Inside view. Card labels.
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    Tally P-150 High-speed Paper Tape Punch. Rear View. Top View. Nameplate.
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    Data Specialties, Inc (DSI) Model NC2400 Paper Tape Reader/Punch. Front Panel. Rear Panel.
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    Wright Card Punch, model 2611. Inside view. Better inside view.
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    Various bits of stuff I need to play with.

    12 position step switch, I hope to make a clock out of some day. 10 position step switch, also for the clock. RTL based decade counter with Nixie readout. Another IBM 5110 computer, very dirty.
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    Electro-mechanical 7-segment display. Rear view of the electro-mechanical 7-segment display. HP 5375A eyboard for the 5360A computing counter.
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    Honeywell Digital Voltmeter counter unit w/neat construction. Counter modules (transistorized) and Nixie drivers. Another view of the stacked modules showing construction. Nixie's and a "1" indicator bulb.
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    Beckman Frequency Counter.

    This is a nice, older (around 1967) frequency counter that uses RTL logic and Nixie tubes.

    Beckman 6230 EPUT Meter (Events Per Unit Time). Rear View. Counter Board, uses RTL logic. Time Base Board.
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    RCA 6499 Radechron tube. This is a storage tube that was sometimes used to store digital information. Data could be written and read out at different times and rates. RCA 6499 Radechron tube.
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    Old Counter Board with Nixie Displays. RIDL Counter Module with vertical column readout. Six decade counter units. All transistorized logic.
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    Various digital numeric displays.

    Incandescent displays from a military test set. RCA Numitron incandescent displays, should make a nice clock. Back side of Numitron board showing driver chips. Nixie voltmeter display assembly. Individual Nixie module, interesting construction. Uses early TTL.
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    Seven segment display using individual lamps. Rear view showing connections. Bulbs are flange based. TEC LITE Nixie transistorized module. TEC LITE Nixie module.
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