Vacuum Tube - 12AT7 / ECC81, JJ Electronics

JJ Electronics
Pictured: Regular
Pictured: Regular
Pictured: Gold
Pictured: Gold
Pictured: Regular
Pictured: Regular
Pictured: Gold
Pictured: Gold
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Vacuum Tube - 12AT7 / ECC81, JJ Electronics

Starting at: $10.95
In stock

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
Item ID:
JJ Electronics
Part Numbers
Pin TypeOur Part NumberUPC/EANJJ Electronics Part Number
GoldT-12AT7-GOLD-JJ609722123471 ECC81 / 12AT7 - GOLD
RegularT-12AT7-JJ844632064036 ECC81 / 12AT7 - GOLD
Product Measurements
Body Height49.2 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 Diameter22 mm
Item Height56.3 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 Information
Packaging Dimensions1 in. × 1 in. × 2.5 in.
Weight (Packaging)Gold version0.03 lbs.
Regular version0.029 lbs.

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Questions and Answers

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Asked by Anonymous on July 26th, 2016.
Matt H
July 26th, 2016
No, 12AT7's are typically not matched in tube amps. Also, we do not offer matching for preamp tubes.

Product Reviews

5.00 out of 5 based on 5 reviews
- August 1st, 2019
5 out of 5

I bought a used Fender Hot Rod Deluxe and decided to swap out all the stock tubes for JJs. To my ears, the JJs are a bit warmer than the stock Fender tubes which come in the amp. I put this tube (12AT7) in the first stage in order to decrease the overall volume. Doing so offers considerably more control over volume. After installing the tube and using the amp, I noticed that the volume "spike" between 1-2 on the main volume (going from no sound to ear shattering loud) was gone. The volume increase is now smooth and steady. Amplified Parts have the best prices I found online for tubes. Shipping was fast and the tubes arrived securely packaged. Thanks, Amplified Parts!

- March 14th, 2019
5 out of 5

Great product!!! great service and attention!

- March 14th, 2019
5 out of 5

Great product!!! great service and attention!

- December 1st, 2010
5 out of 5

JJ's are well made tubes, bought this to replace a brand new MESA tube that was micro-phonic right out of the box. It is in a Kustom H5 head, Using the 12at7 instead of the 12ax7 to lessen the gain a little so it was more preamp/pedal friendly.

- June 30th, 2010
5 out of 5

the only tubes i use for my fenders

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