| Content | A four-pack of our power pentode tubes designed for incredibly sparkly clean tones.
Since the invention of the amplifier, tubes have remained the most fascinating component of electronic sound technology. You donʼt have to be a tweaked-out tone freak to know that the kind of tube you use in your favorite amp plays an enormous role in shaping the personality of your sound. As certified tone maniacs ourselves, we offer a wide variety of premium hand-selected tubes to meet the tonal tastes of all breeds of musicians. We proudly offer tubes that deliver sun-drenched California cleans, as well as tubes that infuse your sound with an overcast British grind. Our various preamp tubes complement your ampʼs power stage while maintaining incredibly low noise and minimal microphonics. One thing all our tubes have in common is the airtight quality control they must undergo before they fall into your hands (careful- these little guys get hot!). When we say hand-selected, weʼre talking about an actual person individually testing each BUGERA valve! Tone means everything to us because we know it means everything to you, and we take every measure to make sure our tubes really give your sound the "soul of valves.” | The JJ ECC81 / 12AT7 tube is a low noise and low microphonic preamp tube. A good choice for phase inverters and reverb circuits calling for 12AT7 tubes.
- 9 pin miniature preamp tube (amplification factor = 60),
- Less gain than a 12AX7
- Preferred by blues and jazz guitarists alike
| Socket: |
Noval(9 Pin) |
| Tube Type: |
12AT7/ECC81/6201 |
|
Superior large plate format Twin Triode, ideal for use in driver and reverb circuits. Offers superior dissipation compared to NOS versions of this tube. Made in Russia Sovtec
- Excellent 12AT7 choice choice for HiFi
- Also suitable for guitar amp circuits
- ECC81 equivalent
12AT7/ECC81/6201/ 9Pin Socket Noval |
Selected ECC83 for the big & warm clean sounds (great for HiFi too!) and mellow top-end when pushed to overdrive. Our recommendation if you want to emphasize punchy mids. Especially great when pushed into a fat overdrive.
All preamp tubes labeled Premium Selected have passed the following tests:
- Low Noise Test
- Microphonic Test
- Gain Test
- Sonic Tests
- Shock Tests
- Listening Tests
- Balanced Output Test
Premium Selected
We call the tubes SELECTED which have passed above tests and thus qualify as reliable all-round tubes of their type.Typically this is around 30-60% from a batch that receives the SELECTED label from TAD.
For applications in particularly sensitive functions such as V1 or input stage with combo amps, V1 in high-gain amps, tube microphones and phono preamps, we recommend using the respective HIGHGRADE selection
Matching and Selecting Options for Preamp Tubes
Matching in Pairs for preamp tubes means that two tubes show identical gain, hence, four characteristically identical systems.
This matching method includes our Balance-Selection. We highly recommend this matching method for hi-fi systems.
TAD Premium Selected/Highgrade tubes are guaranteed for a period of 6 months (according to terms of warranties)
for the quality criteria mentioned above.
| Tube Type: |
12AX7/ECC83/7025 |
| Socket: |
Noval(9 Pin) |
| Selection: |
Premium |
| GROOVE TUBES GT 12AT7 PREAMP TUBE
The Groove Tubes GT-12AT7 preamp tube is manufactured to the highest quality JAN spec. NOS, made in Russia for extremely long life.
Used widely in most U.S.-made amps and, in particular, Fender amps. Fender amps with reverb use 2 - 12AT7s -- one for the reverb drive stage, and one as a phase inverter to drive the push/pull output stage. The makeup of the 12AT7 is very similar to the 12AX7 and it can be substituted for a 12AX7 in a pinch. Some players prefer the 12AT7 in the driver stage of a Marshall for a cleaner, brighter tone. (The driver or phase inverter is the 12AX7 located nearest the power tubes.) The 12AT7 is rarely used in a tone-generating stage, but rather in function stages, so the Groove Tubes GT-12AT7 is selected for durability.
Country of origin: Russia | double-triode 6N1P-EV / 6H1Pi, close to ECC88, 6DJ8, 6922
EXTRA-durable, long-life (-EV version), military equipment.
Tubes are made in 1980s. Tubes not used (new) |
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