**RCA Receiving Vacuum Tube RC-30**

**An Overview of the RCA Receiving Vacuum Tube RC-30**

The RCA Receiving Vacuum Tube RC-30 is a variable-mu triode vacuum tube that was designed and manufactured by the Radio Corporation of America (RCA) in the early 20th century. It was primarily intended for use in radio receivers and, later on, in television receivers. It is characterized by its rugged construction, high gain, and low distortion.

**Design and Construction**

The RC-30 vacuum tube features a cylindrical glass envelope with a metal base. It has a directly heated cathode, an indirectly heated control grid, and a plate electrode. The cathode is made of thoriated tungsten, and the plate is made of nickel. The control grid is made of a molybdenum wire wound around a nickel support. The tube is designed to operate at high voltages, with a maximum plate voltage of 300 volts. It can also handle high currents, with a maximum plate current of 100 milliamperes.

**Electrical Characteristics**

The RC-30 is a variable-mu triode, which means that its amplification factor (mu) can be controlled by varying the voltage of the control grid. This provides the tube with a wide range of gain, making it suitable for use in various applications. The tube has a typical amplification factor of 35, but this can be adjusted to as high as 70 by increasing the control grid voltage.

**Applications**

The RC-30 vacuum tube was widely used in radio receivers, particularly in the early days of radio broadcasting. It was also used in television receivers, where it was employed as a video amplifier. The tube was also used in a variety of other electronic devices, including audio amplifiers, oscillators, and modulators.

**Legacy**

The RCA Receiving Vacuum Tube RC-30 is a classic example of early vacuum tube technology. It was a highly versatile and reliable tube that played a significant role in the development of radio and television broadcasting. The RC-30 is still used today in some vintage radio and television receivers, and it remains a popular collector's item among enthusiasts of early electronics.

RCA Receiving Vacuum Tube Catalog(1975 RC-30) in PDF FORMAT
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1975 RCA Receiving Tube Manual (Technical Series RC-30). Includes tubes not found in RC-19, for example: 6CA7/EL34, 5AR4/GZ34, 6DJ8, 6DN7, 6LF6, 6KG6A/EL509, 6550, 7189, 7591 and the 7868 to name a few. Also includes pictures and industrial receiving tubes.

WAY MORE THAN JUST A TUBE MANUAL
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