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New Arrivals |
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| Western Electric 1859 Transistor | ||||||||
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Western Electric 1859 grown junction transistor, new in original packaging with minor shelf wear. The 1859 is the production version of the Western Electric 1752 development prototype, which was the world's first grown junction transistor. First manufactured in 1953, the 1859 was used in the construction of the first transistorized telephone switching system, in Americus Georgia. The example for sale here was manufactured in 1954.
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| AMI 7550IC LSIC Integrated Circuit | |||||||
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AMI ceramic LSIC gate array, used socket pull, unknown working condition. This chip was used in Burroughs B series computer systems, and several gate array chips would be combined to form the CPU of the unit. The example shown here was pulled from a dismantled system, and has surface wear and other signs of active use. Though pretty to look at, these chips are largely undocumented.
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| Pinlite MD-640 | |||||||
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Pinlite MD-640 minitron display, used condition, tested and working. This is a 4 volt display, and will produce decent brightness in 3.3 volt and 3.6 volt logic circuits. These tiny tube-based displays were used in 70's era military equipment and are very hard to find nowadays. Each display contains seven filaments which have been sealed into a single glass bathtub package. These are used displays, but very segment has been tested and confirmed good and the edges have no chips other than normal factory wear.
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| Pinlite Alphanumeric Minitron Display | ||||||||
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Rare Pinlite alphanumeric 'Minitron'-style incandescent display, used, tested and working condition. Commonly, used in military equipment, these displays use an array of heated lightbulb filaments to display numbers and letters, which have been shoehorned into a tiny cubical envelope. This is a 4 volt display, and should be paired with two diodes per segment when run from a 5 volt TTL source. Digit height is .300 inches and the display is .468 inches high. These displays are used, but all segments test good; alphanumeric Pinlite displays are practically impossible to find, and these would be a good addition to a tube or display collection or for construction of a "four letter word" clock or other display project.
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| TMI STB 134 Time Lock | ||||||||
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TMI STB 134 electronic timelock movement, minor wear, tested and running condition. The STB 134 is a complicated hybrid time lock that incorporates both a mainspring and electronic elements. The winding arbor of this time lock is connected to an internal rotary encoder, which can be used to program a 7 day schedule into the lock for releasing the boltwork. Includes battery door cover.
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| Siemens PD 2435 | ||||||||
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Siemens PD 2435 LED display, clean socket pulls, tested and working. The 2435 is a four digit bitmapped LED display with integrated drivers and character generator ROM. This display can accept 7 bit ASCII data and has numerous secondary features including cursor selection, 4 programmable brightness levels, and various settings to blink and highlight various characters.
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| Master Specialties Incandescent Fiber Optic Display | ||||||||
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Master Specialties incandescent fiber optic display, used condition, tested and working. This display is held together with screws and can be easily opened to install new bulbs or replace them with LEDs. Connection is provided by a printed circuit board edge connector located on the back of the display.
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| 12 Die Epoxy Green LED | ||||||||
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Large green epoxy LED, unknown manufacturer, new old stock. These LEDs contain twelve green dies, which have been mounted to a printed header and doused in pale green epoxy. Specifications are unknown, but we suspect that these are 12 volt devices.
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| Stirling Engine Graphite Piston | ||||||||
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Precision graphite power piston for use in low temperature Stirling engine projects, new old stock, good clean condition. This lightweight graphite piston assembly is ideal for Stirling engine construction and has a sealed drop time of 40 seconds. A threaded plug on the bottom of the glass tube allows for easy attachment to the rest of the engine. This piston assembly has an outside diameter of 18mm and a height of 20mm.
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| Ceramic Body 4 Die Green LED | ||||||||
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5mm ceramic body green LED, unknown manufacturer, new old stock. These look like a long lost relative of the FLV102; each is constructed on a white ceramic header with gold leads. These LEDs contain for green LED dies, and light output is very good for a LED of this era.
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| Hewlett Packard 1818 'Zebra' Integrated Circuit | |||||||
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Hewlett Packard 1818-2xxx series integrated circuit, clean condition with minor shelf wear. This chip is packaged in a bizarre square leadless carrier, with a ceramic gray trace base and ceramic cavity lid. As with many of Hewlett Packard's undocumented chips, the function of this device is unknown.
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| Siemens DL3416 | |||||||
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Siemens DL-3416 LED displays, used condition with clean leads, tested and working. The DL-3416 is a larger version of the well known DL2416 smart LED, and contains an entire seven-bit ASCII decoder, character generator, and four-digit alphanumeric display in a single package. This display has its own memory registers, and will remember character data without processor intervention. The 3416 has a package size of 34mm x 21mm.
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| Unidentified Fiber Optic Component | ||||||||
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Unidentified fiber optic component, new old stock, unknown working condition. We are not sure if this is a LED, laser, or a photodiode... the device only passes current in one direction, but does not emit any visible light when power is applied. The top of the device has an unusual water-clear glass rod as it's lens, which strongly suggests that this part is intended for use with fiber optics.
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| Texas Instruments Flatpack Integrated Circuit Carrier | |||||||
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Gold clad metal chip carrier, 1960s era, salvaged from a semiconductor factory. This carrier still has it's leadframe attached, and would be used to produce a Texas Instruments 'Semiconductor Network" series 14 pin flatpack IC.
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