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Heathkit
Heathkit is the brand name of kits and other electronic products produced and marketed by the Heath Company. The products over the decades have included electronic test equipment, high fidelity home audio equipment, television receivers, amateur radio equipment, robots, electronic ignition conversion modules for early model cars with point style ignitions, and the influential Heath Heathkit H8, H-8, Zenith Z-89, H-89, and Heathkit H11, H-11 hobbyist computers, which were sold in Electronic kit, kit form for assembly by the purchaser. Heathkit manufactured electronic kits from 1947 until 1992. After closing that business, the Heath Company continued with its products for education, and motion-sensor lighting controls. The lighting control business was sold around 2000. The company announced in 2011 that they were reentering the kit business after a 20-year hiatus but then filed for bankruptcy in 2012,Swindwa, Julie"Disassembly complete: Heathkit is no more" ''The Herald-Palladium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heathkit H8
Heathkit's H8 is an Intel 8080A-based microcomputer sold in kit form starting in 1977. The H8 is similar to the S-100 bus computers of the era, and like those machines is often used with the CP/M operating system on floppy disk. The main difference between the H8 and S-100 machines is the bus; the H8 uses a 50-pin bus design that was smaller, more robust and better engineered electrically. The machine also includes a bootstrap ROM that makes it easier to start up, including code for running basic input/output and allowing input through a front-mounted octal keypad and front panel display, instead of the binary switches and lights used on machines like the Altair 8800. The H8 requires a separate terminal to be truly useful; Heathkit introduced several terminals as well. A successor model, the "All-in-One" Heathkit H89, combines a Z80 processor board and a floppy disk drive into the cabinet of an Heathkit H19 terminal. This model also was sold in fully assembled form as the WH8 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zenith Z-89
The Z-89 is a personal computer introduced in 1979 by Heathkit, but produced primarily by Zenith Data Systems (ZDS) in the early 1980s. It combined an updated version of the Heathkit H8 microcomputer and H19 terminal in a new case that has room for a built-in floppy disk on the right side of the display. Based on the Zilog Z80 microprocessor, it is capable of running CP/M as well as Heathkit's own HDOS. Description The Zenith Z-89 is based on the Zilog Z80 microprocessor running at 2.048 MHz, and supports the HDOS and CP/M operating systems. The US$2295 Z-89 is integrated in a terminal-like enclosure with a non-detachable keyboard, 12-inch monochrome CRT with a 80x25 character screen, 48 KB RAM, and a 5.25" floppy disk drive. The keyboard is of high build quality and has an unusual number of special purpose keys: , , , , , , , , , , , and three with white, red, and blue squares. There are five function keys and a numeric keypad. The video display has reverse video ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heathkit H11
The Heathkit H11 Computer is an early kit-format personal computer introduced in 1978. It is essentially a Digital Equipment PDP-11 in a small-form-factor case, designed by Heathkit. The H11 is one of the first 16-bit personal computers, at a list price of US$1,295, () but it also requires at least a computer terminal and some form of storage to make it useful. It was too expensive for most Heathkit customers, and was discontinued in 1982. Specifications The H11 featured:1977 advertising material from Heathkit of Benton Harbor, Michigan. * Processor — LSI-11 (KD11-HA half-size or "double-height" card) * Speed — 2.5 MHz * ROM — 8 kWords (16 KB) (max) * RAM — 32 kWords (64 KB) (max) * Slots — 7 Q-bus slots * Storage — H27 8-inch floppy drive (2 256 KB 8-inch single sided drives) or paper tape * I/O — serial (RS-232) or parallel ports * Operating system — HT-11 (a simplified version of RT-11) * Instruction set � ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward Bayard Heath
Edward Bayard Heath (November 17, 1888 – November 1, 1931) was an American Aircraft engineer. Biography He was born on November 17, 1888, in Brooklyn, New York, to Clark Heath and Ada M. Johnson.Illinois Death Index Heath designed and built a series of aircraft starting in 1909 with a Louis Blériot, Bleriot-inspired monoplane. His first flight was on 10 October 1909 in Amsterdam, New York, resulting in a broken landing gear. On July 4, 1910, Heath made $500 in appearance fees and $200 in photograph revenues from his aircraft that flew a 3 feet above the ground. In 1911 Heath went to work for Glen Curtiss in Hammondsport, New York, as a motorcycle mechanic, next to the Curtiss aircraft factory where he built a second aircraft with Walter Eales making short aerial runs. After purchasing the Chicago-based Bates Aeroplane Company in 1912, Heath founded the ''E.B. Heath Aerial Vehicle Co.'', later becoming the ''Heath Airplane Company''. His company produced the ''Heath Feat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronic Kit
An electronic kit is a package of electrical components used to build an electronic device. Generally, kits are composed of electronic components, a circuit diagram (schematic), assembly instructions, and often a printed circuit board (PCB) or another type of prototyping board. There are two types of kits. Some build a single device or system. Other types used for education demonstrate a range of circuits. These will include a solderless construction board of some type, such as: * Components mounted in plastic blocks with side contacts, that are held together in a base, e.g. Denshi blocks * Springs on a card board, the springs trap wire leads, or component leads, such as Philips EE electronic experiment kits. These are a cheap and flexible option * Professional type prototyping boards, ( breadboards) into which component leads are inserted, following documentation of the "kit". The first type of kit for constructing a single device normally uses a PCB on which components a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heath Parasol
The Heath Parasol is an American single or two seat, open-cockpit, parasol winged, homebuilt aircraft, homebuilt monoplane. Design and development In 1926, Edward Bayard Heath, a successful American air racer and the owner of an aircraft parts supply business, built the first example of the Heath Parasol, a small, single seat parasol winged airplane using surplus wings from a Thomas-Morse S-4, a World War One fighter trainer, mounted above a steel-tube structure fuselage and powered by a Henderson Motorcycle, Henderson four-cylinder motorcycle engine. This was the prototype for a series of single and two-seat recreational craft that utilized the Clark Y airfoil. In 1929 ''Mechanix Illustrated, Modern Mechanix'' magazine published the plans in a series and the plans were reprinted in their "1930 Flying & Gliding Manual," which in turn has been reprinted periodically by the EAA (Experimental Aircraft Association). Although Heath died in 1931, his Parasol designs remained extremely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oscilloscope
An oscilloscope (formerly known as an oscillograph, informally scope or O-scope) is a type of electronic test instrument that graphically displays varying voltages of one or more signals as a function of time. Their main purpose is capturing information on electrical signals for debugging, analysis, or characterization. The displayed waveform can then be analyzed for properties such as amplitude, frequency, rise time, time interval, distortion, and others. Originally, calculation of these values required manually measuring the waveform against the scales built into the screen of the instrument. Modern digital instruments may calculate and display these properties directly. Oscilloscopes are used in the sciences, engineering, biomedical, automotive and the telecommunications industry. General-purpose instruments are used for maintenance of electronic equipment and laboratory work. Special-purpose oscilloscopes may be used to analyze an automotive ignition system or to display th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niles, Michigan
Niles is a city in Berrien County, Michigan, Berrien and Cass County, Michigan, Cass counties in the U.S. state of Michigan, near the Indiana state line city of South Bend, Indiana, South Bend. The population was 11,988 according to the 2020 United States census, 2020 census. It is the larger, by population, of the two principal cities in the Niles-Benton Harbor, Michigan, Benton Harbor Metropolitan statistical area, metropolitan area, an area with 153,797 people. History Niles lies on the banks of the St. Joseph River (Lake Michigan), St. Joseph River, at the site of the French colonization of the Americas, French Fort St. Joseph (Niles), Fort St. Joseph, which was built in 1697 to protect the Jesuit Mission established in 1691. After 1761, it was held by the British colonization of the Americas, British and was captured on May 25, 1763, by Native Americans in the United States, Native Americans during Pontiac's Rebellion. The British retook the fort but it was not re-garrisoned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARRL
The American Radio Relay League (ARRL) is the largest membership association of amateur radio enthusiasts in the United States. ARRL is a non-profit organization and was co-founded on April 6, 1914, by Hiram Percy Maxim and Clarence D. Tuska of Hartford, Connecticut. The ARRL represents the interests of amateur radio operators before federal regulatory bodies, provides technical advice and assistance to amateur radio enthusiasts, supports a number of educational programs and sponsors emergency communications service throughout the country. The ARRL has approximately 161,000 members. In addition to members in the US, the organization claims over 7,000 members in other countries. The ARRL publishes many books and a monthly membership journal called ''QST''. The ARRL is the primary representative organization of amateur radio operators to the US government. It performs this function by lobbying the United States Congress, US Congress and the Federal Communications Commission. The ARR ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
