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How To Tell If Your Tube Is Bad - thetubestore Blog
https://blog.thetubestore.com/how-to-tell-if-your-tube-is-bad/
Loss of Power and other Odd Noises. Sometimes you will hear strange sounds, loss of power, or heavily distort sound. These are signs that a tube is failing. Often power loss that seems like the amp is performing at half power or less will be one or more bad power tubes, or even a dying phase inverter tube.
Tube Failure - High-End Audio Discussion Forum | Audiogon ...
https://forum.audiogon.com/discussions/tube-failure
Power tubes in a Mac and VTL 2-5000 hours on power tubes. Signal valves depends on the duty and what it’s being used for, sometimes only half the valve is being used, but you still need good valves to begin with. Same 2-5000 hours. I’ve lost power and signal tubes..Sometimes problems with one can adversely effect the other..
Types and causes of tube failures, what lo expect …
https://worldradiohistory.com/BOOKSHELF-ARH/Sams-Books/Getting%20The%20Most%20Out%20Of%20Vacuum%20Tubes%20-%20Robert%20B.%20Tomer.pdf
A tube that fails to meet any one of several tests may still perform with complete satisfaction in most equip ment. A tube which meets all normal tests may fail to work satisfactorily in some equipment. Most tubes, new or old, contain some measurable defects; yet many tubes which are rejected as unusable will have no measurable defects.
How to Diagnose Your Amps Bad Tube – Tone Topics
https://tonetopics.com/tell-amps-tubes-gone-bad/
Nothing beats the true analog sound of a cranked tube amp! That feeling when the ‘sweet spot’ is unearthed, and the tubes are creating witchcraft, belting out warm saturated tones when all of a sudden… something goes ‘pop’ and things don’t sound quite right anymore!. The problem is, not many of us have the luxury to a tube tester, leaving us in the dark with our amps diagnosis and ...
Simple tests for Tubes with a Multi Meter - YouTube
https://www.youtube.com/watch?v=_M_lCwQgCMA
How to test your tubes with a multimeter. A simple way to ensure there are no shorts or bad heaters in your tubes.-~-~~-~~~-~~-~-Please watch: "Marshall Dua...
Audio Tube Noise Measurements – Tavish Design
https://tavishdesign.com/pages/audio-tube-noise-measurments
Audio Tube Noise Measurements. Table 1 below summarizes noise measurements on a variety of current production audio tubes, some of which are advertised as “low noise”, as well as a few new, old-stock (NOS) tubes. The tubes have been acquired and tested within the last 5 years (in the case of current production tubes).
How to test the output of a mixer, Easy Audio ... - YouTube
https://www.youtube.com/watch?v=vOyirF-GSG4
Technical Info for Musicians. This easy technical lesson will demonstrate How to test the output of an audio mixer. Visit www.avcssguitarworld and check out...
Tube Basics and Frequently Asked Questions – Upscale …
https://upscaleaudio.com/pages/tube-basics-and-frequently-asked-questions
Many European tubes in the 12AU7, 12AT7, and 12AX7 families may flash brightly when you first power up your gear. This flash is normal. It is also normal for the intensity of the flash to vary from tube to tube, and the flash intensity may also vary or even go away as the tubes age. What is NOT normal is a flash from power tubes.
Tube Guitar Amp Troubleshooting - Rob Robinette
https://robrobinette.com/Tube_Guitar_Amp_Troubleshooting.htm
A leaking cap can cause scratchy pots and affect preamp and power tube bias. Measure the DC voltage on tube grids and look for anomalies. Shorted resistor. Measure the resistance across the resistor. A shorted resistor will show very low or even 0 ohms. Open resistor. Applying light pressure to the resistor and hearing noise can sometimes identify a bad resistor.
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