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Westinghouse 12ax7 Long Gray Plates
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Category Archives: 12ax7/ECC83
Sylvania 5751 – Quest for a gem
For those familiar with high-fidelity vacuum tubes, the Sylvania 5751 JHS and Gold Brand (GB) triple-mica variants are often regarded as the industry standard for audio performance. While collectors frequently prioritize the JHS black-plate or GB gray-plate versions for their aesthetic appeal—notably the gold pins and lettering—audiophiles seeking superior sound quality can achieve the same results at a significantly lower price point. By looking beyond the premium branding, it is possible to acquire these tubes for approximately $20 to $25, compared to the $100 market rate for “Gold” labeled versions.
Continue readingMullard 12ax7 Long Plates
BEL 12ax7 Short Plates India
Mullard 12ax7 Sort Plates (Canada)
GE 5751 5 Stars Gray Plates
“…replaced the Tellies with the 5751’s and the screen was removed, I was able to stick my head out of the window and clearly see to the left and right. ” Read
Siemens 12ax7 Long Plates
The three Mullards – 12ax7
It is a common myth in the audiophile world that tubes manufactured on the same tooling will sound identical regardless of where they were pressed. After experimenting with EI 12ax7s built on Telefunken equipment—which proved to be a far cry from the originals—I decided to put Mullard’s 12ax7 global production to the test.
Continue readingMullard 12ax7 Short Plates
“The ‘holy grail’ of NOS preamp tubes. I’d never heard one of these before, so I was interested to see what all the fuss was about, and I wasn’t disappointed. This tube gave a very warm and open clean tone, which was also very harmonically rich, with a lot of very nice ‘chimey’ overtones. Plenty of headroom to be had here. …” Read
