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Are vacuum tubes worth any money?
Any early vacuum tube with a “tip” (the little glass nub on the top) and a brass base has some value to collectors even if it’s just usable for display. Common tubes manufactured in the late 1950s or 1960s used primarily in televisions currently have little or no value.
Are Chinese vacuum tubes any good?
Modern Chinese Vacuum Tube Amps can be very good but are restricted by the cheap mass market valves that are produced purely for consistency and cost restraints. Chinese Tubes such as 6J1, for instance are a direct copy and hence a direct equivalent of Russian 6J1P etc, etc.
Are new vacuum tubes still made?
Three of the most widely available newly produced vacuum tubes are made by JJ Electronics, Valve Art (O&J Enterprises), and Ruby Tubes (Shuguang Electron Group). * High power amplifier and driver tubes for commercial broadcast stations are still produced, as are some cathode ray tubes.
How do you know if a vacuum tube is good?
Any color from grey/silver, to black is healthy. When a vacuum tube develops an air leak (a small crack or bad seal by a pin for example) this getter color will change to pure white. If you see this you know with 100\% certainty that the tube is bad.
How do you test old vacuum tubes?
Put the tube into your guitar amplifier, tester, or other tube-using machine. Turn on the machine to activate the tubes, and look for an orange, red, or purple glow….Plug the tube into an electrical device to check its glow.
- The filament may be hard to see.
- If the tube doesn’t seem to glow at all, try touching it.
What can I do with vacuum tubes?
For example, vacuum tubes are still used in high power RF transmitters, as they can generate more power than modern semiconductor equivalents. For this reason, you’ll find vacuum tubes in particle accelerators, MRI scanners, and even microwave ovens.
What tubes are made in Russia?
Vacuum tubes have been made in Russia for almost 100 years. Some popular brands are Reflektor, SED SPb/J.S.C. Svetlana, Ulyanov, JSC Voskhod, and Novosibirsk. If you are looking for a rare Russian tube for your amplifier we can help.
Where are groove tubes made?
In August, Groove Tube operations moved into Fender facilities in Ontario, Calif., and Scottsdale, Ariz., while production moved to a factory in Mexico. Citing a nondisclosure agreement, Pittman would only say that Groove Tubes sold for 10 times its annual earnings.
Where are Svetlana tubes made?
“JSC Svetlana is a Russian company that owns and operates the Svetlana factory in St. Petersburg, Russia, which has been making vacuum tubes for almost a century and are the original Svetlana produced tubes.”
Are any vacuum tubes still made in USA?
The only remaining U.S. vacuum tube manufacturers who make tubes for amplifiers that I know of are: Western Electric in Rossville, Georgia, who still produces a handful of high end tubes such as the 300B . RCH Labs in Carson City, Nevada produces hand-made 6L6 tubes.
What does a bad tube look like?
Crackling, squeals and feedback, excessive noise and muddiness or low output are all evidence of tube problems. Power tubes. The two main symptoms of a power tube problem are a blown fuse or a tube that begins to glow cherry red. If it happens again, replace the tubes before using the amp again.