501-502 SUPREME Vacuum Tube Tester

Review SUPREME Vintage Model Vacuum Tube Tester Untested

The Supreme 501-502 vacuum tube tester is a must-have tool for any electronics enthusiast or professional technician. This versatile and robust tester is designed to accurately test and diagnose a wide range of vacuum tubes, including triodes, tetrodes, pentodes, and beam power tubes.

The Supreme 501-502 tester features a user-friendly analog interface with clear and easy-to-read dials and meters. It allows for the testing of various tube parameters such as plate voltage, grid voltage, grid leakage, plate current, and anode resistance. The tester also includes a built-in high voltage power supply capable of delivering up to 1200V DC, making it suitable for testing high voltage tubes like those used in radio transmitters and power amplifiers.

One of the key features of the Supreme 501-502 tester is its ability to test tubes in both grid-biased and plate-biased modes. This is particularly useful when testing tubes with different types of internal heater resistors or when diagnosing issues related to tube biasing. The tester also includes a built-in test circuit for testing cathode bypass resistors, making it a complete solution for vacuum tube testing.

The Supreme 501-502 vacuum tube tester is built with high-quality components and is designed to withstand the rigors of daily use in a professional workshop or laboratory environment. It is housed in a sturdy steel case with a protective front panel, making it resilient to accidental impacts and bumps. The tester also includes a detachable power cord and a set of test leads, making it easy to set up and use.

In summary, the Supreme 501-502 vacuum tube tester is a high-performance and versatile tool for testing and diagnosing vacuum tubes. Its user-friendly interface, robust construction, and comprehensive testing capabilities make it an essential tool for electronics enthusiasts and professional technicians alike. Whether you are working on vintage audio equipment, restoring old radio sets, or maintaining high-power amplifiers, the Supreme 501-502 vacuum tube tester is the perfect companion for your electronics projects.

Supreme 501-502 vacuum tube tester is a popular choice among electronics enthusiasts and technicians due to its comprehensive testing capabilities for vacuum tubes. Here are some pros and cons to help you decide if this tester is worth your investment:

1. Wide Tube Coverage: The Supreme 501-502 tester can test various types and sizes of vacuum tubes, including triodes, tetrodes, pentodes, and beam power tubes. This makes it a versatile tool for testing a wide range of vacuum tubes used in various electronic applications.

2. Comprehensive Testing: The tester offers a range of testing functions, including DC and AC resistance, grid leakage, heater voltage and current, plate voltage and current, and amplifier tests. This helps in identifying various issues with vacuum tubes, making it an essential tool for repair and maintenance work.

3. Intuitive User Interface: The tester features a clear and easy-to-understand display with simple controls, making it easy for users to navigate and perform tests. Additionally, it comes with a comprehensive instruction manual, making it suitable for both beginners and experienced technicians.

4. Durable Construction: The Supreme 501-502 tester is built with high-quality components and a robust design, ensuring long-lasting use. Its sturdy construction also makes it suitable for use in various environments, including industrial and laboratory settings.

5. Portability: The tester is compact and lightweight, making it easy to transport and use in various locations. This makes it a convenient tool for both hobbyists and professionals who need to test vacuum tubes on-site.

1. Limited Input Voltage: The tester may not be suitable for testing high-voltage vacuum tubes, as its maximum input voltage is limited. This may limit its usefulness for certain applications, such as testing high-power amplifier tubes.

2. Requires Calibration: Like any other testing equipment, the Supreme 501-502 tester requires regular calibration to ensure accurate test results. Calibration can be time-consuming and may require specialized tools and expertise.

3. Price: The tester is relatively expensive compared to other vacuum tube testers on the market. This may make it a less affordable option for hobbyists or those on a tight budget.

The Supreme 501-502 vacuum tube tester offers a wide range of testing capabilities for various types and sizes of vacuum tubes, making it a versatile tool for electronics enthusiasts and technicians. Its comprehensive testing functions, intuitive user interface, and durable construction make it a valuable investment for those who need to test and maintain vacuum tubes regularly. However, its limited input voltage, requirement for regular calibration, and relatively high price may make it a less suitable option for those with limited budgets or who only need to test low-voltage vacuum tubes occasionally.

If you are a hobbyist or technician who works extensively with vacuum tubes and requires comprehensive testing capabilities, the Supreme 501-502 vacuum tube tester is an excellent investment. Its versatility, accuracy, and durability make it a valuable tool for diagnosing and repairing vacuum tube issues. However, if you only need to test low-voltage vacuum tubes occasionally or have a limited budget, there may be more affordable options available on the market that meet your needs. It is recommended to research and compare various vacuum tube testers to find the one that best fits your requirements and budget.

Details:

I take lots of pictures so you can see cosmetics. Please realize when buying antique, vintage or used equipment that they cannot be in an absolute mint perfect condition, might need some service, now later. If fully tested then that is what they are. If not fully tested, then items are tested to the full extent and may have something wrong that I discovered.

So take a good look. I try to resolve any issue both our best interests. Use the zoom function and have a good look. Beautiful vintage Supreme model 501-502 vacuum tube tester untested due to the poor shape of power cord, I thought it best leave alone and not test.

Please have a look at the pictures for cosmetic condition. I make mistakes once in a while. It is impossible to describe every scratch, scuff or mark. That is what they are there for.

I am not a huge retail outlet. Fully working.

specifications vactubetest:

• brand: Supreme
• mpn: 501-502
• part type: Vacuum Tester Tube
• custom bundle: No
• country/region of manufacture: United States

general vactubetest:

• category: Business & Industrial > Test, Measurement Inspection > Calibrators > Tube Testers

returns vactubetest:

• policy: no returns

offer vactubetest:

• best offers: true
• availability: in stock
• started: july 18, 2025
• quantity: 1
• options: ship-to-home
• sold #: 16

seller vactubetest:

• # reviews: 3626
• city: kingman, arizona
• rating: 100.0%

shipping vactubetest:

• class: standard
• type: calculated
• carrier: fedex, usps
• service: fedex ground or fedex home delivery, usps ground advantage
• transit: 4-10 days

payments vactubetest:

• wallet: google-pay
• other
• credit card: discover