Stereo headphone audio amp on AD822AN

The amplifier is designed for use with stereo headphones. This audio amp is economical, can be operated from a single low-voltage power supply and at the same time has good technical characteristics. Total harmonic distortion of output signal span at 300 mV (peak to peak) at a frequency of 1 kHz is 0.079% (-62 dB with noise).

Stereo channels are input via the separating nonpolar capacitors C1 and C2. Voltage divider resistors R1-R2 and R3-R4 at the noninverting input circuits are chosen so that the outputs of op amp present voltage (1.5 V) equal to half the supply. The gain

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UAPO developed a new system DC power supply for the future development of Russian aviation

August 1,AEX.RU— Ufa aggregate production association (UAPO) holding "Aviation" SC Rostekhnadzor has developed an innovative system of DC power for future Russian multipurpose fighter. The press service of the holding. New power supply system based on the double conversion inverter power twice higher than that of the previous generation, produced on the basis of the converter transformer.

  It is planned to rework the system to be installed on a mainline aircraft MS-21. "This year, the holding will test prototypes of the new system DC power supply for the future development of domestic aviation. Series production

Continue reading UAPO developed a new system DC power supply for the future development of Russian aviation

St. Petersburg: Lenenergo commissioned substation Pushkin — South

July 25 in St. Petersburg, "Lenenergo" (part of the group of companies of "Rossetti") after extensive modernization commissioned 110/10-6 kV substation № 185 "Pushkin — South".

The substation will provide a reliable power supply in the south of the city where housing is active. Reconstruction of the substation allowed to give extra power to the network of Pushkin and provide backup power supply of residential and commercial sector as well as consumers such as Arcade, Pushkin House Youth Pushkin Museum of History, Cathedral of St. Catherine and other world famous historical and cultural sites.

At the

Continue reading St. Petersburg: Lenenergo commissioned substation Pushkin — South

External power supply facilities Pipeline System Pur-Pe — Samotlor were pilot tests

 Photo source:cupp.ru

Test voltage supply was drawn from the mainline electrical power grids in Western Siberia on a temporary basis to the substation 110/10 kV NPS "Pur-Pe" and substation 110/10 kV "Interim PS-2." Tests were in normal mode.

Currently at the construction sites of external power supply made for landscaping, completed commissioning activities to ensure the timely commissioning of facilities and electrical power supply to the pipeline system "Pur-Pe — Samotlor."

The pipeline "Pur-Pe — Samotlor" designed to create a bridge between the western and eastern components of the Russian pipeline system. The route will pass through

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Concern Energomera launched a series of storage cupboards

In March 2011, the Group "Energomera" began mass production of 19 "cabinets storage Series ST-EP. Built-in rechargeable ST-EP systems are designed to accommodate input, distribution and conversion of electric power, as well as placing an uninterruptible power supply (UPS) and batteries. Cabinets with established UPS used to provide telecommunications equipment, communication equipment and digital television guaranteed, uninterrupted power supply.

Cabinets have the following characteristics of reliability: degree of cabinet protection IP20, climatic UHL4, average life: not less than 25 years.

Industrial machinery expanding line of power

"Industrial machinery" expand the range of power

 

Group of companies "industrial machinery" expands the range of plants.

New diesel generators are designed for independent power supply facilities, particularly sensitive to the quality of energy.

Power plants based on the Japanese Mitsubishi engines supplemented low-power models — from 8 to 32 kilowatts. The first unit of the extended series ADMiTaifun in production. He will be working at the airport — to ensure continuous operation of the customs post.   The power plant of 30 kW will be part of the system of

Continue reading Industrial machinery expanding line of power

UAPO developed a new system of DC power

for advanced Russian air

August 1,AEX.RU— Ufa aggregate production association (UAPO) holding "Aviation" SC Rostekhnadzor has developed an innovative system of DC power for future Russian multipurpose fighter. The press service of the holding. New power supply system based on the double conversion inverter power twice higher than that of the previous generation, produced on the basis of the converter transformer.

  It is planned to rework the system to be installed on a mainline aircraft MS-21. "This year, the holding will test prototypes of the new system DC power supply for the future development of domestic

Continue reading UAPO developed a new system of DC power

UAPO developed a new system of DC power

for advanced Russian air

August 1,AEX.RU— Ufa aggregate production association (UAPO) holding "Aviation" SC Rostekhnadzor has developed an innovative system of DC power for future Russian multipurpose fighter. The press service of the holding. New power supply system based on the double conversion inverter power twice higher than that of the previous generation, produced on the basis of the converter transformer.

  It is planned to rework the system to be installed on a mainline aircraft MS-21. "This year, the holding will test prototypes of the new system DC power supply for the future development of domestic

Continue reading UAPO developed a new system of DC power

St. Petersburg: Lenenergo commissioned substation Pushkin — South

July 25 in St. Petersburg, "Lenenergo" (part of the group of companies of "Rossetti") after extensive modernization commissioned 110/10-6 kV substation № 185 "Pushkin — South".

The substation will provide a reliable power supply in the south of the city where housing is active. Reconstruction of the substation allowed to give extra power to the network of Pushkin and provide backup power supply of residential and commercial sector as well as consumers such as Arcade, Pushkin House Youth Pushkin Museum of History, Cathedral of St. Catherine and other world famous historical and cultural sites.

At the

Continue reading St. Petersburg: Lenenergo commissioned substation Pushkin — South

The reconstruction of the grid complex sections of the route Lipetsk Don

Energy subsidiary of OAO "Rossetti" — JSC "IDGC of Center" — held a large-scale reconstruction of the complex network that provides the power supply Lipetsk part of the federal highway "Don".

The project involves improving the quality of power supply outdoor lighting, pay terminals and social infrastructure. To implement the required additional capacity 1.8 MW.

Construction and reconstruction of power grid infrastructure to supply the M4 highway "Don" is part of the federal actions to modernize the country’s most important routes. Topic has gained special relevance in connection with the preparation for the 2014 Olympics

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