Which 12ax7/5751 tube won the right to be called the best and the worst?
Updated August 5th, 2020
Continue readingThe Best 12ax7 tubes
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Category Archives: 5751
Arcturus 5751 Black Plates D-getter
Raytheon 5751 Black Plates Triple Mica
“The strength of this tube is its overall balance. Its got the 5751 sense of focus in spades, is clean, open and evenhanded in frequency response if just a little sweet on top.” Read
“Very sweet, warm vocals. Very open soundstage. With classical, you really feel the vibration of the violin strings. It is very warm and very nice. It really gives a distance sensation.” Read
GE 5751 5 Stars Black Plates
Tung-Sol 5751 Long Gray Plates
“The most liquid of all the tubes, It lets the highs just roll off.” Read
“This has to be the most detailed sound I’ve ever gotten out of the ‘head.” Read
Continue readingSylvania 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 readingGE 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
Raytheon 5751 Black Plates, Windmill
“I do believe I’m in love. The Raytheon black plate 3 mice (1961)
is truly wonderful. I do like it better even than a GE BP 3-mica (1957).
clarity, dynamics, bass. yum.”
” Sweet and smooth Raytheon 5751 tubes with the rare four bladed windmill shape top getter. Rich and smooth tone with quiet background.” Read
Ken-Rad 12ax7 Black Plates
GE purchased Ken-Rad (Kentucky Radio Corporation) in 1945, although tubes under Ken-Rad brand have been produced until 1951, so a lot of references are for GE not Ken-Rad
” The GE Black plate 12AX7 (and 5751) have an enchanting and beautiful sound. Articulation is excellent, though not as detailed as the TungSol. Sound stage is expansive and inclusive.” Read
Continue readingGE 5751 Gray Plates
“Will outlast and outperform any of the current production crap! These are Joint Army-Navy tubes, USA made, and are a BARGAIN right now.” Read
” I love em, especially if an amp is prone to fizz or brittleness in the crunch, they will smooth it out, but its not like drastically reducing the gain so its a nice compromise” Read
“GE Triple Mica 5751 is absolutely unbeatable in the line stage of any Fisher that uses 7591 or 7199 output tubes, but not for 7868 output tubes” Read