GE Short Plate 12AX7 Vintage NOS Vacuum Tube | Fuzz Audio

In the bustling hallways of vintage NOS 12AX7 tubes, where brands like RCA, Mullard, Telefunken, and Amperex are the popular crowd everyone raves about, there’s an unsung hero that deserves a bit more limelight—meet the GE 12AX7. Now, is it the prom king of tubes? Definitely not. Does it have the smooth moves of the class charmer? Not quite. But what the GE 12AX7 lacks in flashy elegance, it more than makes up for with its warm heart, quiet brawns, and steadfast reliability. Plus, hanging out with the GE 12AX7 won’t empty your wallet—this tube is a refreshingly affordable date.

Did you know the GE 12AX7 was a key player in some of the earliest Fender tweed amps, continuing well into the 1970s? While RCA tubes dominated from 1960 to 1965, GE tubes were a staple both before and after that period during Fender’s most iconic eras. Many folks back then might tell you they didn’t pay much attention to the tube brand—if the amp worked, that was enough. But truth be told, companies like Fender were constantly evaluating tubes that would deliver the best sound. Tubes are directly responsible for sound amplification, after all, and making amps that were loud yet clear was crucial. If Fender trusted GE tubes in their amps for over two decades of innovation, that really says something. Underrated? Definitely. The GE 12AX7 is perhaps the most underrated tube of all time, quietly powering some of the best sounds in the industry.

The Four Types of GE 12AX7’s and How to Choose the Right One

Like with most vintage tubes, the GE 12AX7 took several forms over the years as GE made “improvements” to their design. Just like big tech today compates to make the smallest, fastest phones and computers, vacuum tubes were the leading technology of the day. BrandS like RCA, Mullard and GE all competed to create the ultimate long lasting low noise tube, and in doing so, they created variations in the tubes they made throughout the years. The trick when it comes to buying (and selling) vintage vacuum tubes is to understand the stregths and weaknesses of each tube type.

Unfortunately, we all have to face the music at some point on our musical journey and realize modern tubes are just not any good. This is why, if you truly love your anolog device and value your tone, you have to get rid of the Chinese tubes clogging it up. And while, yes, pretty much any vintage valve is superior to any modern made example, understanding the difference long plates, black plates and short plates among other details will help you tailor your devices sound to your preferences, elevating your experience to a whole new level.

If you ever get confused or realize you need more help, Fuzz Audio is here for you! Email your specific question to support@fuzzaudio.com and we would be honored to help how we can. We also encourage you to check out our other resources such as our Tube Buyers Guide and our Plate Cheat Sheet.

GE 12AU7 Long Plate and Short Plate NOS Vacuum Tubes | Fuzz Audio

The Original GE 12AX7 Tube: The Black Plate (1949-1957)

Tracing the origins of the GE 12AX7 tube can be quite elusive. RCA introduced this type in 1947, sparking immediate competition. We believe GE swiftly got to work on their own version, evidenced by our encounters with KENRAD carbonized black plate tubes, marked as early as 1949. Acquired by GE in 1945, KENRAD’s quick adaptation just two years post-RCA’s launch suggests a rapid reverse engineering feat.

GE’s 12AX7 black plates are not just vintage; they’re practically historical relics. The earliest versions, carbonized black plates, were produced from around 1949 to the early 1950s. Following those, the typical black plate versions appeared from 1953 to 1957. These tubes are notoriously hard to come by, particularly in low noise variations that break up early and exude a warm, rich tone—qualities that make them highly sought after. At Fuzz Audio, we pride ourselves on offering only these low noise variants, despite their scarcity. It’s been about four months since we last had a usable GE 12AX7 black plate in stock, and it’s always uncertain when the next batch will surface.

The influence of GE’s 12AX7 black plates extended deep into the fabric of American music, particularly through their use in early guitar amplifiers from 1950’s to 1957. These tubes, embodying a rich, warm sound and characteristic early break-up, were pivotal in defining the sonic landscape of that era. Notably, they powered iconic amplifiers such as the Fender 5D2 Princeton, which emerged in 1955. This relationship between GE tubes and legendary American amps not only fueled the sounds of rock and blues but also solidified the reputations of the equipment that bore them.

The Most Underrated Tube of All time: The GE Long Plate 12AX7 (1958-1964)

When we talk about underrated tubes, the GE 12AX7 long plate truly stands out. At Fuzz Audio, we’re captivated by the warm, deep tones it delivers, making it one of our favorites for both hi-fi gear and guitar amplifiers. So that is why it disappoints us to find them selling less often then they deserve.

Produced between 1958 and 1964(ish), the GE long plate 12AX7s were ubiquitous in the late ’50s and early ’60s, finding their way into everything from lab and medical equipment to household appliances, including radios, stereo units, and musical instruments like Hammond or Baldwin organs. These tubes were among the most prolifically produced of the era.

So, why isn’t there more buzz around these tubes? It comes down to three letters: RCA. Overshadowed by this industry giant, GE tubes often go unnoticed. While it’s true that RCA’s versions might be considered ‘better’—with their long plates being more refined and less warm, their 12AX7A models smoother, quieter, and more consistent—the difference in quality is minimal compared to the steep rise in RCA’s prices and rarity. Whether you’re budget-conscious or not, GE long plate tubes are definitely worth a listen, offering excellent value and sound quality that challenges their pricier counterparts.

GE 12AX7 Long Plate NOS | Fuzz Audio

GE 12AX7 Short Plate: Second Most Underrated Tube of All Time (1965-1985)

GE 12AX7A Short Plate Vintage Vacuum Tube | Fuzz Audio

A few years back, a 1964 Fender Concert Brownface amp walked through our doors—pristine, with all its original tubes, and seemingly untouched by time. Once we revived it on a variac and powered it up, we were struck by the most beautiful clean tone we had ever encountered. It was like hearing a grand organ resonate through a vast hall—absolutely astounding. Curious about the source of this sonic magic, we peeked under the hood and, sure enough, found a full set of GE tubes, from the 6L6/5881s to the GE short plate 12AX7As.

Finding these GE tubes wasn’t a surprise; rather, it reinforced our already high regard for them. The short plate variation of GE’s 12AX7 excels in loud amplifiers, maintaining clarity at higher volumes, and delivering a warm yet bright sound that’s perfect for classic rock, blues, country, and honky-tonk.

The GE short plate represents the zenith of GE’s 12AX7 production—being their most reliable and lowest noise tube. These tubes, which include models labeled 12AX7, 12AX7A, 12AX7WA, and 7025, so do make sure to check the plate type rather than relying on the tube code.

Ideal as phase inverters, these tubes are renowned for their durability and consistent balance. For those using HIFI amplifiers and seeking precise articulation over warmth and depth, the GE short plate 12AX7s are an excellent choice.

A quick note:

All of this logic carries over to GE 12AU7 and 5751. These are remarkable tubes that deserves respect. For GE 12AU7, they had each iteration of the same tubes, meaning 12AU7 black plates, long plates, and short plates. We can assume GE short plates 12AU7 will be less noisy than GE black plate 12AU7 and so on.

The GE 12AX7: The Classic Underdog

As we’ve explored the various incarnations of the GE 12AX7, from the venerable black plates of the early days to the sophisticated long and short plates that followed, one thing becomes clear: the GE 12AX7 is more than just a tube; it’s a testament to the relentless pursuit of sonic excellence. Despite being overshadowed by more famous brands, the distinct qualities of the GE 12AX7—its durability, warmth, and precision—have solidified its status as one of the most underrated yet pivotal components in the annals of audio technology.

The journey through the different types of GE 12AX7 tubes not only highlights the evolution of audio engineering but also underscores a broader narrative about innovation and quality in the vintage audio market. For enthusiasts and professionals alike, choosing GE tubes means tapping into a legacy of unmatched reliability and sound fidelity that continues to resonate through generations.

At Fuzz Audio, our commitment remains steadfast: to bring you the finest in vintage tubes, ensuring that each piece not only meets but exceeds your expectations. Whether you’re refurbishing a classic amp or fine-tuning a modern rig, consider the GE 12AX7—a hidden gem that promises to enhance your audio experience, proving that sometimes, the best treasures are those that are underrated.

Remember, whether you’re a seasoned audiophile or a curious newcomer, we’re here to help guide you through the intricate world of tubes. For more information or personalized advice, reach out to us at support@fuzzaudio.com. Explore our resources, learn from our guides, and join us in celebrating the rich, vibrant history of GE tubes.

GE 12AX7 Black Plates | NOS Preamp Tubes | Fuzz Audio