
( Brand: United Electronics ), ( Manufacturer Part Number: FV-20 ), ( Type: Transmitting Triode Vacuum Tube ), ( Country/region Of Manufacture: United States )
The FV-20 United Transmitting Triode Vacuum Tube is a remarkable piece of vintage electronic equipment that harks back to the golden age of radio broadcasting. This tube, manufactured by United Vacuum Tube Company, is a testament to the engineering prowess of the past.
The FV-20 is a triode vacuum tube, which means it has three elements: a cathode, a grid, and a plate. The cathode emits electrons, which are controlled by the grid and then accelerated towards the plate, causing it to conduct electricity and produce an output signal. This triode configuration allows for a wide range of applications, from audio amplification to radio frequency (RF) oscillation.
The FV-20 is a medium-mu triode, meaning it has a moderate gain, making it ideal for a variety of uses. Its plate current is rated at 150 milliamperes (mA), and it can handle a plate voltage of up to 350 volts (V). The tube's frequency response is quite broad, with a range of 500 Hz to 15 MHz, making it suitable for both low-frequency audio applications and high-frequency RF use.
Physically, the FV-20 is a compact tube, measuring 6.5 inches in length and 1.25 inches in diameter. It is enclosed in a glass cylinder, with metal base and plate elements. The tube's filament is rated at 6.3 volts and 75 milliamperes, and it requires a warm-up period of several minutes before reaching optimal operating temperature.
In summary, the FV-20 United Transmitting Triode Vacuum Tube is a versatile and powerful piece of electronic equipment with a rich history. Its medium-mu triode configuration, broad frequency response, and compact size make it a valuable asset in a variety of applications, from vintage radio restoration to amateur radio projects. Whether you're a hobbyist, a collector, or a professional restorer, the FV-20 is a tube that is sure to capture your interest and inspire your imagination.
Pros of buying FV-20 United Transmitting Triode Vacuum Tube:1. Authenticity and History: The FV-20 is a vintage tube that has been in production since the early 20th century. It is a part of audio history, and owning one can be a collector's item.
2. Sound Quality: Many audiophiles believe that vacuum tubes provide a warmer, more natural sound compared to solid-state components. The FV-20 is no exception, and it is known for its smooth and rich sound.
3. Durability: Vacuum tubes are made of glass and metal, which makes them more durable than electronic components made of plastic. They are less likely to be damaged by electrical surges or other power issues.
4. Sustainability: Vacuum tubes are made of materials that can be recycled, making them more sustainable than other electronic components.
Cons of buying FV-20 United Transmitting Triode Vacuum Tube:1. Expense: Vacuum tubes, especially vintage models like the FV-20, can be expensive. They may cost more than modern electronic components, and they may require additional maintenance and replacement costs.
2. Technical Difficulties: Vintage tubes can be more difficult to use and maintain compared to modern electronic components. They may require specialized equipment and knowledge to test, repair, and replace.
3. Limited Availability: Vintage tubes can be hard to find, and once they are out of production, they may become increasingly rare and expensive.
4. Energy Consumption: Vacuum tubes consume more electricity than modern electronic components. They may not be the best choice for those looking to reduce their energy consumption.
Conclusion:The FV-20 United Transmitting Triode Vacuum Tube is a vintage tube that offers a unique sound quality and a sense of history. However, it comes with its own set of drawbacks, including expense, technical difficulties, limited availability, and energy consumption. If you are an audiophile looking for a warmer sound and are willing to invest in maintenance and replacement costs, then the FV-20 may be a good choice for you. However, if you are looking for a more cost-effective and energy-efficient solution, then you may want to consider modern electronic components.
Recommendation:If you are interested in the FV-20 United Transmitting Triode Vacuum Tube, it is recommended to research its specifications and compare its sound quality to other vintage and modern tubes. You may also want to consider the cost of maintenance and replacement, and whether it is worth the investment for you. Additionally, it is recommended to purchase the tube from a reputable dealer to ensure its authenticity and quality.
Up for offer is a vintage transmitting triode vacuum tube FV-20 by United Electronics. This tube has good continuity with tight base no rattles,sold as found please see pictures.