What Is a Vacuum Tube Tester

Posted on Dec 18, 2020

Vacuum Tube Tester

The biggest stopping factor for buying a vacuum tube tester would be the price you are prepared to pay. There is a great deal of knowledge, objective truth, correct misinformation, and non-technical viewpoints, biases, or opinion, all of which are rarely based on facts or honesty in engineering.

What is the key explanation for the tester? Questions that you need to ask yourself first about every vacuum tube tester? And what kind of device are you checking for a tube, usually audio, power amplifiers, receivers, high-end power amplifiers, or guitar amplifiers? Do you just need a limited collection of lamps, or do you require a large variety of lamps to be covered? Is it likely that you will be conducting more lamp experiments in the future than you are now doing and on a larger range of lamps? How important is the tester's precision to you and your needs? Is the issue with the physical tester's size? What test features are you looking for or needing? Lastly, how much would you like to spend? For the most part, these questions will assess the precision, durability, and versatility of the tester you finish with!

When they were new to their time, most of these testers only cost between $150 and around $500. They're selling for doubles, triples, and more today! This price truth, combined with the fact that they are frequently sold is very frustrating after being poorly treated and configured as each would need to expend additional funds to make it useful, durable, and precise/calibrated. They no longer manufacture testers (few are produced and others are not, as in the past, full-service testers), but the price is determined by the consumer.
 

Initial Steps for a Vacuum Tube Tester

The biggest stopping factor for buying a vacuum tube tester would be the price you are prepared to pay. There is a great deal of knowledge, objective truth, correct misinformation, and non-technical viewpoints, biases, or opinion, all of which are rarely based on facts or honesty in engineering. Just scientific and engineering facts are dealt with here! Here is some general knowledge without knowing the answers to the above questions: At this stage, it will solve the problems of Gm or transconductance (also called transconductance), the basic unit of measurement is conductance, or the modern term is Siemens.

Do not purchase any tester that can only act as a pollution tester. Only look for a transconductance (Gm) tester if accuracy is necessary. Not all Gm testers are however made equal. As for the emission model, technical details on tube emissions were not given by the original tube manufacturer. Therefore the official statistics on the output of pipes should not be correlated with the test findings in the pollution model. Emissions of their own do not tell a full tale of the state of a tube. Each manufacturer of research equipment has set its own test standards.


For old radio/TV and repair careers, these testers are quite appropriate. They are designed not to determine the accuracy of the tubes, purchase costly tubes or sell tubes, but to locate bad or damaged tubes! If you need repeatable and precise test outcomes or want them, then these are not the versions you want!
 

What's the Perfect Vacuum Tube Tester?

We’re suggesting the best features for the vacuum tube tester. You might, however, need numerous test features, which may impact the available choices. The additional function of two power transformers is given to all these modules. All heater (filament) current is given by one and all test and calculation voltage/current is provided by the other. Therefore the heater and the test transformer share the load of the tube under test (TUT), which also increases the measurement performance and decreases the load of the test circuit and the power transformer. Another benefit is that there is a different AC line voltmeter. 

This helps reduce the effect of the sagging of the line (accuracy issues). Sorry, there is a need for those technical bubbles! Furthermore, these models often have more than one stage of test signal that can obtain more detailed test data on a larger variety of tubes. They have roles like short testing and noise testing. Often these testers are not too pricey but can be hard to locate. The downside though is the Gm meter and its technological requirements. If there is damage to the meter, a new Gm meter must be mounted, which includes a separate extra circuit. The original meter cannot be fixed. These models are fine, stable, and precise testers, and some new technology can be improved to have greater durability and precision!
 

:: Read More: How to Choose the Right Tube Checker for Tube Testing?

Supplementary Data about Vacuum Tube Tester

Through the years, the design and capability of pipe testers also changed, but all testers were service testers except for the lab ones, and most service testers were proportional testers. That is, at operating voltages below the lamp specification, they measure the tube, but the chosen operating values were proportionally similar to the test result value to the values ​​provided in the datasheet, so they were valid. A new Gm meter must be mounted, which includes a separate extra circuit. The original meter cannot be fixed. These models are fine, stable, and precise testers, and some new technology can be improved to have greater durability and precision!

It's time-consuming and a little complex to set up. Both materials are military-grade, meant for war, so the testers are strong. If you do not mind the configuration process, it's a really successful tester. The gauge shows a percentage quality that is not a clear Gm value, but a map or simple arithmetic should be used to obtain the real Gm value. Both testers are instruments for monitoring, and from time to time they require repair and configuration. If this does not happen, it is pointless to be accurate and believe the test results. The radios in which you buy them, take them home, and use them before they stop working, testers are not like that. So, unless it is sold, repaired, and calibrated, be able to fix and calibrate any tester you purchase

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