Tondi Elektroonika, formerly known as ('Tallinn Semiconductor Resistor Factory'), ('Tallinn Radiotechnical Factory named after

Hans Pöögelmann Hans Pöögelmann (30 December 1875 Aidu Parish, Viljandi County, Estonia – 27 January 1938, Moscow, Soviet Union) was an Estonian and Soviet Russian socialist, and later communist politician, journalist and poet. In 1917, he was elected member ...

') and ('Hans Pöögelmann Electrotechnical Factory'), as well as Factory A-1381, was a factory for electrotechnical components located in

Tallinn Tallinn () is the most populous and capital city of Estonia. Situated on a bay in north Estonia, on the shore of the Gulf of Finland of the Baltic Sea, Tallinn has a population of 437,811 (as of 2022) and administratively lies in the Harju ' ...

Estonia Estonia, formally the Republic of Estonia, is a country by the Baltic Sea in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the sea across from Sweden, to the south by Latvia, a ...

. It was a significant component of the

Soviet The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...

military-industrial complex. When the centralization of the USSR economy resumed in 1966, the national councils were abolished and the factory was subordinated to

Moscow Moscow ( , US chiefly ; rus, links=no, Москва, r=Moskva, p=mɐskˈva, a=Москва.ogg) is the capital and largest city of Russia. The city stands on the Moskva River in Central Russia, with a population estimated at 13.0 million ...

and renamed Factory A-1381. As the public name of the numeric factory was not allowed to contain location, the factory was named after September 1, 1966, the name of the Hans Pöögelmann electrical engineering factory (the electrical engineering factory (abbreviation ETT)). Under this name, the company operated all its glory to the formation of Tondi electronics in 1991. During this time, the P-N-P-type bipolar transistors and thyristors, the P-channel output transistors and the transistor pair and the outdoor transistor input were produced. In addition, there were some consumer products in production and hearing -proofs about medical electronics.

Production

Components

The factory has manufactured

photoresistor A photoresistor (also known as a photocell, or light-dependent resistor, LDR, or photo-conductive cell) is a passive component that decreases resistance with respect to receiving luminosity (light) on the component's sensitive surface. The elect ...

varistor A varistor is an electronic component with an electrical resistance that varies with the applied voltage. Also known as a voltage-dependent resistor (VDR), it has a nonlinear, non- ohmic current–voltage characteristic that is similar to that ...

transistor upright=1.4, gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink). A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch e ...

thyristors A thyristor () is a solid-state semiconductor device with four layers of alternating P- and N-type materials used for high-power applications. It acts exclusively as a bistable switch (or a latch), conducting when the gate receives a current t ...

and

microchip An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material, usually silicon. Large numbers of tiny M ...

s. From 1959 to 1978, the factory manufactured temperature-sensitive photoresistors 04-AN (in Cyrillic: ) for use in Soviet military rocket

guidance system A guidance system is a virtual or physical device, or a group of devices implementing a controlling the movement of a ship, aircraft, missile, rocket, satellite, or any other moving object. Guidance is the process of calculating the changes in po ...

s. This brought the factory under the official military-industrial complex umbrella, and the factory was assigned a number — A-1381 — and the location reference was removed from the factory's name.

Consumer products

The factory has manufactured consumer-grade battery systems, electric fence systems, car engine diagnostics devices and even

souvenir A souvenir (), memento, keepsake, or token of remembrance is an object a person acquires for the memories the owner associates with it. A souvenir can be any object that can be collected or purchased and transported home by the traveler as a m ...

radio set An antique radio is a radio receiving set that is collectible because of its age and rarity. Types of antique radio Morse receivers The first radio receivers used a coherer and sounding board, and were only able to receive CW continuous wave (C ...

s. Since 1979, an important — and by 2008, the main — line of production has been

hearing aid A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified as medical devices in most countries, and regulated by the respective regulations. Small audio amplifiers su ...

s, peaking in 1989 at 176,500 units manufactured.

Recreational activities

The mixed choir Helitron was initially set up to cater to employees of Tondi Elektroonika.

Current status

Currently, AS Tondi Elektroonika manufactures mainly hearing aids.

References

External links

Official website
{{Authority control Defence companies of the Soviet Union Engineering companies of Estonia Hearing aid manufacturers Economy of Tallinn History of Tallinn 1950s establishments in Estonia Estonian brands Electronics companies of the Soviet Union