Vacuum Tube - 12AY7, JJ Electronics
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.
RoHS Compliant
Accessory Items:
| Capacitance, Grid to Filament | 1.6 pF | |
| Capacitance, Plate | 0.33 pF | |
| Capacitance, grid to plate | 1.7 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 Dimensions | 2.5 in. × 1 in. × 1 in. | |
| Weight (Packaging) | 0.03 lbs. |
 Specification Sheet | All Models |
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Product Reviews
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 articulate...to a fault. If there's a bug in your circuit...you'll hear it. Just the way it should be. Great job JJ...you made me a believer.
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.
Great tube, my amp now has much more headroom.
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.
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