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Audio Tube Noise Measurements – Tavish Design
https://tavishdesign.com/pages/audio-tube-noise-measurments
Tube Basics and Frequently Asked Questions – Upscale …
https://upscaleaudio.com/pages/tube-basics-and-frequently-asked-questions
Resolving Tube Amp Hum, Buzz, or Hiss | Sweetwater
https://www.sweetwater.com/sweetcare/articles/tube-amp-noise-and-sound-solutions/
Noise ad microphonics in vacuum tubes
http://www.audiotubes.com/tubetap.htm
Very microphonic tubes can make loud clunking noises when controls are turned on the tube equipment, and also pick up music and other sounds from the hi-fi system loudspeakers. This acoustic energy is converted to electrical energy. In the case of a microphonic tube picking up the same music it is amplifying, it causes a problem known as "sonic image smear".
Tubes test OK, but noisy? — Polk Audio Forum
https://forum.polkaudio.com/discussion/171933/tubes-test-ok-but-noisy
They are noisy tubes. Try cleaning the pins gently and clean the tube sockets with DeoxIT stuff. It may not help if the tubes are really microphonics / noisy in nature. About 80% of all vintage tubes out there are microphonics to some extent. The newer tubes may be less noisy since they are plenty and the factory rejected the noisy ones.
JAN-Philips 6922 Low Noise Audio Tubes - www.thetubestore.com
https://www.thetubestore.com/jan-philips-6922-low-noise
This 6922 tubes is specially selected and has to meet our tough standards (less than 50% pass) for low noise levels, which guarantees the best performance for preamplifiers. Special note for owners of the Audible Illusions Modulus 3 Pre-amp: this tube will not work in this pre-amp. We haven't seen any other pre-amps that experience the same problem (extreme sensitivity to …
Preamp Tubes - Tube Audio Store
http://www.tubeaudiostore.com/tubes.html
Super Low Noise (SLN): Quite simply the industry’s quietest tube, suitable for the finest phono stages as well as any other critical application. Our SLN tubes are within 1dB of the theoretical noise limit for that tube. Low Noise (LN): A superior tube especially tested for today’s quality line stages. Our LN tubes are within 4dB of the theoretical noise limit for that tube.
How to get rid of hum and other noises from your audio ...
https://www.techhive.com/article/582313/how-to-get-rid-of-hum-and-eliminate-other-noises-from-your-audio-and-video-systems.html
The number-one cause of unusual audio noise and weird video is the ground loop, simply because it’s so darned easy to create. The most common manifestations are a loud buzz or hum coming through ...
How To Tell If Your Tube Is Bad - thetubestore Blog
https://blog.thetubestore.com/how-to-tell-if-your-tube-is-bad/
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