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With their beautifully crafted designs and quality workmanship, vintage radios and television sets are works of art in their own right, and the RCA 12B4A tube and tube socket set brings them back to life. This tube is ideal for anyone who appreciates nostalgia and wants to restore their classic radios, ham radios, amplifiers, and televisions back to working order. Musicians are familiar with the superior audio output and sound quality that is achieved by using the RCA 12B4A vintage tube and tube socket in their amplifiers and preamps. The RCA 12B4A vintage tube and tube socket was made in the United States in the 1960s and features black plates, double mica spacers, copper rods, yellow silkscreen, and a top-mounted round halo getter. History buffs are delighted that they can restore their treasured heirlooms or fully enjoy that rare classic find that rounds out their collection. Vacuum tubes are a key component in powering up audio units and supplying the current necessary to send pleasing melodies through your speakers. Tubes such as the RCA 12B4A vintage tube and tube socket are devices that control electric current between electrodes in a vacuum container. These types of tubes, or valves, work by making use of thermionic emissions created by a hot filament or cathode. Not all electronic valves are vacuum tubes however; some are gas-filled devices that work at low pressure and make use of the phenomena created by electric discharge in gases. The earliest tubes were diodes that contained only a heater, a plate, and a heated electron-emitting cathode. Current in these units was able to flow in only one direction as electrons traveling through the tube were collected by the anode. Adding one more control grid turns the diode vacuum tube into a triode. Triodes allow the current between the anode and cathode to be controlled by the grid’s voltage. When further grids are added to vacuum tubes, they become known as tetrodes and pentodes. When triodes were first used in radio receivers and transmitters, it was found there was a certain amount of oscillation in tuned amplification stages unless the gain was very limited. Eventually, a neutralization technique was developed using a small capacitor to connect the winding back to the grid, and when adjusted properly, it canceled the undesirable oscillation effect to provide better audio output and sound. Tubes like the RCA 12B4A vintage tube and tube socket come under a variety of classification models determined by their capacities, such as their frequency range and power rating as well as the applications they are used for: transmitting, receiving, amplifying, switching, mixing, or rectification. Individual tubes may have multiple classifications; for example, dual triodes can be used as flip-flops in computers as well as for audio preamplification. Tubes were gradually replaced in the 1950s by solid-state devices such as transistors, but they are still preferred for use in microwave ovens and some high-frequency amplifiers. The RCA 12B4A tube and tube socket is highly prized among audiophiles and musicians for its quality craftsmanship and the superb audio quality it brings to their vintage equipment.

Product Identifiers

Brand
RCA
eBay Product ID (ePID)
141056870

Additional Product Features

Type
12b4a
Country/Region of Manufacture
United States

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RCA 12B4A Vintage Tube & Tube Socket

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Additional Product Features