605A-500 HICKOK Tube Roll

Review HICKOK Vintage Series 600 Tube Test Roll Chart

The Hickok 605A-500, 533-A, 533-DM, 605A-800, and 600 tubes are valued components in vintage electronic equipment and continue to be sought after by collectors, hobbyists, and engineers for their unique characteristics and historical significance. These tubes, produced by the Hickok electro-mechanical measuring instrument corporation, were initially manufactured between 1951 and 1959. These tubes were a part of Hickok's Type 600A series that catered to the needs of test and measurement applications.

The Hickok 605A-500 is a Pentode semiconductor vacuum tube, dedicated to use as an indicator tube. It operates at a plate voltage of 225 volts, and its heating voltage requirement is 5.4 volts DC. Despite its age, this tube is known for its excellent sensitivity and fast recovery properties, which made it an ideal choice for cathode ray oscilloscopes and other testing equipment during its time.

The 533-A and 533-DM triode tubes in the 600 series were versatile components designed for use as both amplifier and oscillator tubes. The 533-A has a plate voltage of 175 volts and a heating voltage of 6.3 volts, allowing it to output powerful signals with high efficiency. The 533-DM variation of this tube requires a 200-volt plate voltage and 6.3 volts heating voltage. Both of these tubes demonstrated excellent performance in amplifier circuits, providing suitable gain and power handling capabilities.

The Hickok 605A-800 and 600 tubes share similar specifications, with the 605A-800 being a pentode and the 600 being a UTC (ultra-long-life triode). The 605A-800 operates at a plate voltage of 225 volts, while its heating voltage requirement is 5.4 volts and its maximum power output is 0.9 watts. The 600 tube operates at a plate voltage of 250 volts and, just like its companion, requires a heating voltage of 6.3 volts. These tubes were particularly used in continuous-wave radar and radio applications due to their high gain and low distortion characteristics.

These innovative and historically significant tubes played a vital role in advancing technology and applications during their era, paving the way for new electronic designs and technologies. Vintage electronic enthusiasts can recycle these tubes in modern projects, preserving the rich history of electronics and engineering. Although these tubes might not be the standard choice in today's tech-driven world, they represent a time when electronics were developing at a remarkable pace and shall endure as precious components worthy of respect and appreciation.

The Hickok 605A-500, 533-A, 533-DM, 605A-800, and 600 tubes are vacuum tubes commonly used in various electronic applications. While each tube has its unique characteristics, here are some pros and cons of investing in a set of these tubes:

**Hickok 605A-500**: This tube is a Pentode and is widely used as a power tube in various radio applications, such as radio transmitters and power amplifiers. It provides high power output with low plate current, enabling good power efficiency.

- High power output (up to 6.3W)

- Low plate current (80mA)

- Good power efficiency

- Higher voltage requirements (450V)

- Limited availability compared to other tubes

**533-A**: The 533-A tube is an octal base Audio Frequency Amplifier Tube or amplifier valve. It is commonly used to provide gain in audio applications, like radio receivers and amplifiers. It delivers high quality sound and is known for its low noise.

- Widely used for audio applications

- High gain (120dB)

- Low noise

- Limited power output (1.2W)

- Higher plate voltage (375V) and plate current (45mA)

**533-DM**: The 533-DM tube is a dual-triode and can be used as both an amplifier and a voltage regulator. Its wide application range, good volume regulation, and consistency make it a popular choice in various vacuum tube equipment.

- Dual triode configuration

- Versatile - can be used as an amplifier and a voltage regulator

- Wide application range

- Requires a bias supply

**605A-800**: The 605A-800 tube is a power pentode that is commonly used in television receivers and power amplifier applications due to its high power output, low plate resistance, and inferior plate dissipation.

- High power output (up to 8W)

- Wide bandwidth (30MHz)

- Low plate resistance (42 Ohms)

- Higher voltage requirements (500V)

- Limited availability

**600**: The 600 tube is a power triode widely used in audio applications as an output tube in power amplifiers due to its efficiency, high current provision, and low plate dissipation.

- High current provision (up to 900mA)

- Low plate dissipation (45W)

- Efficient and suitable for audio power applications

- Higher voltage requirements (375V)

In conclusion, buying a set of Hickok 605A-500, 533-A, 533-DM, 605A-800, and 600 tubes results in a versatile collection that covers a wide range of applications, from power amplifiers and power supplies to audio and radio applications.

However, these tubes may require separate high voltages and have varying power outputs, amplification factors, and gain. Additionally, availability may vary, and you should consider the cost, power requirements, and availability for each specific tube depending on your application.

My recommendation would be to carefully evaluate your project requirements, such as the power supply, amplification levels, and frequency range, before committing to purchasing a complete set or individual tubes.If you need the tubes for specific applications of high power audio amplifiers and radio applications, consider buying the 533-A, 605A-800, and 600 tubes, while the Hickok 533-DM may be suitable for applications like power supplies and amplifier designs with additional voltage regulation needs.

Details:

specifications vactubetest:

• brand: Hickok
• mpn: 605a-500
• model: Hickok 533-a 533-dm 605a-500 Series 600
• part type: Tube

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• started: january 6, 2025
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