The EF86 is a high gain pentode designed to amplify low-level audio signals. It is typically used as a preamp in audio equipment and instrument amplifiers. Because of its design, the EF86 is much more…
Read More »
Atma-Sphere is world renown for fantastic their OTL amplifiers. In this video they use stop-motion animation to provide us with a look into how the award-winning Atma-Sphere M-60 power tube amp is hand assembled. If…
Read More »
During a recent visit to China we dropped by the Shuguang tube factory located in the city of Changsha, Province of Hunan. On every visit to the factory we ask to take photos and video…
Read More »
A number of years ago we started to see more and more about cryo “treatment” of vacuum tubes. We read through all the marketing and tried to figure out how this could improve a vacuum…
Read More »
A re-post from Phil Taylor of Effectrode.com I’m not a metallurgist nor a physicist but as an audio electronics engineer I’ve a vested interest in anything that might help improve the sound quality and reliability of…
Read More »
If you’re a serious audiophile with tube gear chances are you know the names Balanced Audio Technology or Lamm Industries. Unlike so many other tube amplifier manufacturers, you won’t find KT88, 6550, or 300B output…
Read More »
When shopping for tubes, there are a number of issues to consider such as price, longevity, testing, and tone. Some amps such as the Vox AC-30 can be tough on power tubes, and when power…
Read More »
Vacuum tubes, amplifier tubes, or thermionic valves, are the heart of guitar amplification. Even solid state amps are usually designed to emulate the sound of tube amps. But the vacuum tube was actually critical for…
Read More »
History fans will enjoy this nostalgic film advertisement from the the tube (valve) manufacturer Mullard in England. They use English actor Jon Pertwee (Dr Who and The Navy Lark) in this piece about the impact…
Read More »
X-rays of vacuum tubes? Nick Veasey is a photographer that likes to do things a little differently. Rather than using a camera, he X-rays everything. Mentioned in an article published by Wired, Veasey has taken…
Read More »
