Which Mullard is 12AX7?
Original Mullard ECC83 (12AX7) pictured on the left and the ‘reissue’ tube on the right. This report compares the gain, inter-stage matching, microphony and electrical noise of both tubes….Gain.
| Manufacturer | Section 1 | Section 2 |
|---|---|---|
| Mullard | 95.0 | 95.4 |
| ‘Reissue’ A | 94.0 | 95.1 |
| ‘Reissue’ B | 93.9 | 93.3 |
| JJ | 106.3 | 103.5 |
How do I identify a Mullard 12AX7?
On the Mullard, if you look at the top mica as you face the plates, there are “skipped” points on the sides, characteristic of British Mullard short plate 12AX7s after late in the first year (1959), but not BELs or other Philips 12ax7s from the 1960s-70s.
Who makes new Mullard tubes?
New production Mullard tubes are assembled by hand in the Reflektor factory in Saratov, Russia and their excellent performance closely mirror’s that of vintage Blackburn construction.
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.
When did Mullard stop making valves?
This photograph from our archives, shows the few staff which were left, when the very last valve came off the production line and the factory closed, in 1982.
Where are Mullard valves made?
This great documentary about the manufacturing of thermionic valves was made by Mullard at the Blackburn factory in Great Britain.
Who makes JJ amp tubes?
JJ Electronic, s.r.o is a Slovak electronic component manufacturer, and one of the world’s remaining producers of vacuum tubes. They are based in Čadca, in the Kysuce region of Slovakia. Most of the products that JJ offers are audio receiving tubes. These vacuum tubes are mainly used for guitar and hi-fi amplifiers.