Vacuum Tube - 12AT7 / ECC81, JJ Electronics
Pictured: Regular
Pictured: Gold
Pictured: Regular
Pictured: Gold
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Starting at: $19.95
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The JJ Electronic 12AT7 / ECC81 is a good choice for phase inverters, reverb drivers, and general preamp use. This tube offers low noise, low microphonics, and warm smooth tones at a great price. Like all JJ tubes, it has a rugged construction that doesn’t compromise the sound of your amp. The JJ 12AT7 is a solid replacement for any 12AT7, ECC81, or 6201 tube. It can also be used to replace 12AX7 tubes in position 1 to reduce gain.
RoHS Compliant
Accessory Items:
| Pin Type | Our Part Number | UPC/EAN | JJ Electronics Part Number |
|---|---|---|---|
| Gold | T-12AT7-GOLD-JJ | 609722123471 | ECC81 / 12AT7 - GOLD |
| Regular | T-12AT7-JJ | 844632064036 | ECC81 - 12AT7 |
| Body Height | 49.2 mm | ||
| Cathode Current (Ik) | ≤ 15 mA | ||
| Filament Current (If) | 300 / 150 mA | ||
| Filament Voltage (Uf) | 6.3 / 12.6 V | ||
| Gain (μ) | 60 | ||
| Grid Circuit Resistance (Rg) | 1 MΩ | ||
| Grid Voltage (Ug) | ≥ -50 V, -2 V typical | ||
| Heater to cathode voltage (Uk/f) | ≤ 90 V | ||
| Internal Resistance (Ri) | 11 kΩ | ||
| Item Diameter | 22 mm | ||
| Item Height | 56.3 mm | ||
| Plate Current (Ia) | 10 mA | ||
| Plate Dissipation (Wa) | ≤ 2.5 W | ||
| Plate Voltage (Ua) | ≤ 300 V, 250 V typical | ||
| Transconductance (S) | 5.5 mA/V | ||
| Packaging Dimensions | 1 in. × 1 in. × 2.5 in. | ||
| Weight (Packaging) | Gold version | T-12AT7-GOLD-JJ | 0.0265 lbs. |
| Regular version | T-12AT7-JJ | 0.03 lbs. | |
| T-12AT7-JJ - Regular version | Body Height | 49.2 mm |
| Cathode Current (Ik) | ≤ 15 mA | |
| Filament Current (If) | 300 / 150 mA | |
| Filament Voltage (Uf) | 6.3 / 12.6 V | |
| Gain (μ) | 60 | |
| Grid Circuit Resistance (Rg) | 1 MΩ | |
| Grid Voltage (Ug) | ≥ -50 V, -2 V typical | |
| Heater to cathode voltage (Uk/f) | ≤ 90 V | |
| Internal Resistance (Ri) | 11 kΩ | |
| Item Diameter | 22 mm | |
| Item Height | 56.3 mm | |
| Plate Current (Ia) | 10 mA | |
| Plate Dissipation (Wa) | ≤ 2.5 W | |
| Plate Voltage (Ua) | ≤ 300 V, 250 V typical | |
| Transconductance (S) | 5.5 mA/V | |
| T-12AT7-GOLD-JJ - Gold version | Body Height | 49.2 mm |
| Cathode Current (Ik) | ≤ 15 mA | |
| Filament Current (If) | 300 / 150 mA | |
| Filament Voltage (Uf) | 6.3 / 12.6 V | |
| Gain (μ) | 60 | |
| Grid Circuit Resistance (Rg) | 1 MΩ | |
| Grid Voltage (Ug) | ≥ -50 V, -2 V typical | |
| Heater to cathode voltage (Uk/f) | ≤ 90 V | |
| Internal Resistance (Ri) | 11 kΩ | |
| Item Diameter | 22 mm | |
| Item Height | 56.3 mm | |
| Plate Current (Ia) | 10 mA | |
| Plate Dissipation (Wa) | ≤ 2.5 W | |
| Plate Voltage (Ua) | ≤ 300 V, 250 V typical | |
| Transconductance (S) | 5.5 mA/V |
 Specification Sheet for Regular | T-12AT7-JJ |
| Specification Sheet for Gold | T-12AT7-GOLD-JJ |
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Questions? Contact us at [email protected], or give us a call at 480-820-5411
Substitute Products
The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.
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Product Reviews
One tube good. One bad! You selling junk now!
I used these for cathode followers in an SVT-style bass amp I designed. They do exactly what I need them to: supply a huge, immaculate signal to the power section. I prefer JJs to Chinese or Russian tubes; they seem better and more consistently built.
The people at AES are always helpful and informative!!!
I am resurrecting my 1966 Fender Princeton Reverb amp.
The reverb was a little weak and so I replaced the 12AT7 and BINGO the reverb was back
and strong as ever!!!
Thank you all!
Great tubes, sound great, last a long time
I'm rebuilding a 1973 Fender Quadreverb and decided to try some tube options. this JJ ECC81 is doing great. like everyone else I shop around to find a good deal and Antique Electronic Supply usually is where I wind up.
great tube
ordered set of tubes for resto of a 1956 Zenith am/fm...all NOS -EXCEPT the 12AT7 which was Slovokian 'manuf. This new tube was DEF...produced loud HUM when inserted in radio..suspect cathode leakage...PLUS the tube is HUGE..and barely fits between the 2 ifs..Ive asked for a replacement tube,,,and specified NOS if possible .
tubes worked ok on old ac voltmeter
I use this tube for more gain in my Leslie speaker cabinet. This goes in the place of 12au7 tube,and this is what I use it for.
I use this tube for more gain in my Leslie speaker cabinet. This goes in the place of 12au7 tube,and did is what I use it for.