Ray Tubes Expands Range with Select 12AU7 and Core 12AU7 Vacuum Tubes

Ray Tubes announced new-production 12AU7 tubes in both its Core and Select Collections. With this addition, Ray Tubes is now supplying the most common vacuum tubes, including the 12AU7, 12AX7, EL34, 6SN7, KT88, and 300B, all available through its network of retail and brand partners. All products from Ray Tubes are designed and tested specifically for audio applications and come with a one-year warranty, which is a great assurance compared to the risks of buying New-Old-Stock items.

In their 30th year as a company, Tube Amp Doctor has expanded its REDBASE tube family with a new exclusive and high-quality premium tube model, the entirely new TAD KT88-STR REDBASE. TAD just announced that they now have stock of the newest addition to the REDBASE-tubeline - the KT88-STR REDBASE. And the best news in these times is that the new tubes are ready to ship worldwide, meeting the strong demand for heavy-duty KT88 tubes!

VANA, Ltd. is now the North American distributor for European Audio Team’s (E.A.T.) line of vacuum tubes made in the Czech Republic. E.A.T. is dedicated to hand making the finest 300B and KT88 tubes tested on custom made instruments to meet the highest standards. E.A.T. Vacuum Tubes are painstakingly handcrafted within a former Tesla factory in the Czech Republic, under the supervision of Jozefina Lichtenegger and using the manufacturing equipment previously in the Tesla Vrsovice factory.

Richard Honeycutt reviews the second and more extensive edition of this electronics classic, Fundamental Amplifier Techniques with Electron Tubes. He gives high marks to this massive tome that provides useful information about electron tube technology, including their power supplies, for the design and DIY construction of these electron tube audio amplifiers.

This simple single-ended amp project by Pete Millett is a great performer and a very well documented project that was immediately adopted by many DIY'er's. The amplifier achieves good power output and low distortion by employing “E-linear” feedback in the output stage. This article was published in audioXpress, April 2005.

Since 1947, when McIntosh introduced its power amplifier design using its patented bifilar-wound dual-primary output transformer, the brand’s power amps have been considered the performance standard. The MC75 in considered one of the best tube classic amps of all times, while the C22 Preamplifier is the perfect “control center”. Now McIntosh decided to bring back those two classic designs.