Vacuum Tube - 12AY7, JJ Electronics

Vacuum Tube - 12AY7, JJ Electronics

JJ Electronics
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The JJ Electronic 12AY7 is a low microphonic tube built in the same rugged fashion as all JJ preamp tubes. This tube offers the classic warm 12AY7 sound with rich and balanced harmonics when pushed enough to break up. It’s a great choice for authentic tweed tones but can also help clean up amps when used in place of a 12AX7. Additionally, the JJ 12AY7 is a great replacement in 6072 microphones.

Item ID:
JJ Electronics
RoHS Compliant
Product Measurements by Type
Capacitance, Grid to Filament1.6 pF
Capacitance, Plate0.33 pF
Capacitance, grid to plate1.7 pF
Cathode Current (Ik)≤ 10 mA
Filament Current (If)300 / 150 mA
Filament Voltage (Uf)6.3 / 12.6 V
Gain (μ)40
Grid Voltage (Ug)≥ -50 V, -4 V typical
Heater to Cathode Voltage (Uk/f)≤ 90 V
Internal Resistance (Ri)22.8 kΩ
Plate Current (Ia)3.0 mA
Plate Dissipation (Wa)≤ 1.5 W
Plate Voltage (Ua)≤ 300 V, 250 V typical
Transconductance (S)1.75 mA/V
Packaging Information
Packaging Dimensions2.5 in. × 1 in. × 1 in.
Weight (Packaging)0.03 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet399.15 KB

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Product Reviews

5.00 out of 5 based on 8 reviews
tom colopy - September 13th, 2022
5 out of 5


Charles Roland - September 10th, 2022
5 out of 5


Robertbruce scallon - July 24th, 2022
5 out of 5

Just what I needed to have the sound I wanted.
A lot more mellow than a 12ax7.very bluesy sound
These jj 12ay7 tubes are perfect.

Chris Johnson - February 8th, 2022
5 out of 5

I had an application requiring for which the 12AY7 was ideally suited. I auditioned a couple NOS GE 6072a's and RCA's from the late 50's and was quite pleased. For a kick, I tried the current production JJ...and, well...let's just say, I've recalibrated my opinion regarding current production vacuum tubes. These things are fantastic. They're deathly silent (first priority for a 'Y7) and a fault. If there's a bug in your'll hear it. Just the way it should be. Great job made me a believer.

Allen3k - November 16th, 2021
5 out of 5

Keep one on hand for inventory. Some repairs lately have needed to dial down the gain a bit from a full-on 12a--X--7.

Teddy - September 16th, 2019
5 out of 5

Great tube, my amp now has much more headroom.

Xander - April 24th, 2016
5 out of 5

I put it in a Black Face (Bassman but for guitar)amp to soften the punch a little, and smooth the distortion. I lost a little bit of power, but it is power I don't need so much these days. I get to turn it up a little louder and get more overdrive character at lower volumes.

dagovirtuoso - February 17th, 2016
5 out of 5

As expected with the AY7 it produces a lot less gain than an AX7. It produces a lot more head room and produces a much tighter sound, which is something I think JJ's are known for. I've installed it in the 2nd gain stage of a class AB single channel amp, right after a Sovtek 12AX7WB