
( Brand: Electronic Enterprises ), ( Manufacturer Part Number: WL-812 ), ( Type: Vacuum Tube ), ( Unit Type: Unit )
The WL-812 Tube, specifically the 812A Radiotron, is a high-performance vacuum tube component designed for enterprise-level radio frequency (RF) applications. This tube is a legacy component with a rich history, originally manufactured by RCA and Raytheon, and is now available for modern-day use.
The 812A Radiotron is a pentode vacuum tube, known for its robust construction and excellent electrical characteristics. It operates at a plate voltage of 450V and a plate current of approximately 400mA, making it suitable for high-power applications. The tube features a built-in grid structure designed to ensure stability and consistent performance, even under heavy load conditions.
The WL-812 Tube offers a high gain of around 60db, making it ideal for power amplifier applications in radio transmitters, particularly in the medium wave (AM) band. Its frequency range extends from 500kHz to 1700kHz, providing a wide coverage for broadcasting purposes.
The tube's filament is rated at 6.3V, 500mA, which is relatively low compared to other high-power tubes, making it more energy-efficient and easier to integrate into systems. The tube's overall dimensions are approximately 12.25 inches long and 3.4 inches in diameter, making it suitable for most standard tube sockets.
In terms of reliability, the WL-812 Tube is known for its longevity and durability. It can withstand high temperatures and can operate for extended periods without failure, making it a preferred choice for mission-critical applications.
In conclusion, the WL-812 Tube (812A Radiotron) is a versatile and reliable vacuum tube component suitable for enterprise-level RF applications. Its high gain, wide frequency range, and energy efficiency make it an excellent choice for power amplifier applications in radio transmitters. With its robust construction and excellent electrical characteristics, this tube offers consistent performance and long-term reliability, making it a valuable asset for any enterprise looking to enhance their RF systems.
The WL-812 tube (812A radiotron, also known as the RCA 811A or Raytheon 5881) is a popular choice for audio enthusiasts and tube amp builders due to its high power handling and warm, rich sound. Here are some pros and cons to consider:
Pros:1. High power handling: The WL-812 tube is capable of delivering a high amount of power, making it suitable for driving high-impedance speakers.
2. Warm, rich sound: The WL-812 is known for its warm, full-bodied sound, which is highly valued by audiophiles.
3. Long lifespan: When properly cared for, these tubes can last for many years.
4. Availability: These tubes are still in production and are widely available from various manufacturers.
5. Versatility: The WL-812 can be used in a variety of applications, including audio amplifiers, RF power amplifiers, and vacuum tube oscillators.
Cons:1. Cost: Compared to lower-powered tubes, the WL-812 can be more expensive.
2. Size: The WL-812 is a larger tube, which can make it more difficult to fit into some amplifier designs.
3. Heat: Due to its high power handling, the WL-812 can produce a significant amount of heat, which may require additional cooling measures.
4. Break-in period: New WL-812 tubes may require a break-in period to sound their best.
In conclusion, the WL-812 tube is a high-quality, versatile tube that is suitable for a wide range of applications. Its rich, warm sound and high power handling make it a popular choice among audiophiles. However, its cost, size, heat production, and break-in period are important factors to consider. If you are looking for a high-quality tube amplifier and are willing to invest in a more expensive, larger tube, the WL-812 may be a good choice for you. If you are on a budget or have space constraints, you may want to consider a lower-powered tube.
I did purchase from a local operator. Please look at all pictures closely before purchasing. Not saying it won't need adjustments but, looks like a nice clean unit. Items may need a more in depth cleaning.
I am not an operator and don't have the knowledge to fully test myself. I do a lot of business with them and they always have well cared for gear. Everything you see in the pictures is what included this lot. Photos are the best.