Battery eliminator

Battery eliminator

A battery eliminator is a device powered by an electrical source "other" than a battery, which then converts the source to a suitable DC voltage that may be used by a second device designed to be powered by batteries.

A battery eliminator does away with the need to replace batteries but may remove the advantage of portability. A battery eliminator is also effective in replacing obsolete battery designs.

Some examples of battery eliminators:
* 9v mains power supply, size and shape of a PP9 battery, intended to replace the battery in portable radios. 1960s
* Solar panel providing power for a portable appliance

History

Early commercial battery eliminators were produced by Edward S. Rogers, Sr.' company in 1925, as a complement to his line of "batteryless" radio receivers. Another early producer of battery eliminators was the Galvin Manufacturing Corporation (later known as Motorola) which was opened on September 25,1928 by Paul Galvin and his brother Joseph E. Galvin, to build battery eliminators for radio receivers installed in automobiles.

While it might seem surprising to need such a device in a car to power a radio, the first car radio receivers were based on vacuum-tube technology. Vacuum tubes in the 1920s required two or three different voltages to function correctly.
* LT, typically 4 or 6.3 volts at high current to power the valve filaments
* HT, typically 100 to 300 volts at low current to power the anode circuitry
* Additional voltages were sometimes also required for grid bias.

Batteries designed for these portable vacuum tube receivers were a combination of several different battery types and sizes, combined in a single package and intended to slowly wear out at about the same rate. The battery typically connected to the radio via a specially shaped four- or five-pin connector, keyed so that the plug must be inserted correctly.

A battery eliminator would take the typical 6-volt or 12-volt DC power from a car battery and transform it into the required LT and HT needed to power the vacuum tubes in a car radio.

Without a battery eliminator, it was necessary to occasionally replace the battery pack in the vacuum-tube car radio.

ee also

*Batteryless radio
*Batteryless switch

* [http://www.articleworld.org/index.php/Battery_eliminator Battery eliminator needs and drawbacks]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • battery eliminator — eliminator (def. 2). * * * …   Universalium

  • Battery eliminator circuit — A battery eliminator circuit (BEC) is an electronic circuit designed to deliver electrical power to other circuitry without the need for a battery. Historically the expression was sometimes used to describe devices used to power battery driven… …   Wikipedia

  • Battery Eliminator Circuit — Ein Battery Eliminator Circuit, abgekürzt BEC, ist eine oft im RC Modellbau verwendete elektronische Spannungsregelung und ersetzt ( eliminiert ) eine zweite Batterie. Ziel ist es, die Stromversorgung des Antriebes und der Steuerung unabhängig… …   Deutsch Wikipedia

  • battery eliminator — noun : a device to supply voltage to electron tubes from electric power supply mains compare a power supply, b power supply, c power supply * * * eliminator (def. 2) …   Useful english dictionary

  • battery eliminator —   n.    an electric device designed to provide energy to equipment normally requiring batteries for operation …   Locksmith dictionary

  • Battery charger — This unit charges the batteries until they reach a specific voltage and then it trickle charges the batteries until it is disconnected …   Wikipedia

  • eliminator — eliminatory /i lim euh neuh tawr ee, tohr ee/, adj. /i lim euh nay teuhr/, n. 1. a person or thing that eliminates. 2. Also called battery eliminator. a device that operates from a power line to supply current and voltage to a circuit designed to …   Universalium

  • Car audio — Car audio/video (car AV), auto radio, mobile audio, 12 volt and other terms are used to describe the sound or video system fitted in an automobile. While 12 volt audio and video systems are also used, marketed, or manufactured for marine,… …   Wikipedia

  • Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …   Wikipedia

  • Motorola — This article is about the original company which split in 2011. For the mobile phone manufacturer, see Motorola Mobility. For the equipment provider, see Motorola Solutions. Motorola, Inc. Former type Public company Industry …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”