Vacuum Tube - 12AX7 / ECC83, JJ Electronics
The JJ Electronic 12AX7 / ECC83 has quickly become a modern classic in preamp tubes. Its rugged design and rich harmonics make this tube an obvious choice for musicians who need a reliable and high quality tube at a reasonable price.
The balanced tone of the JJ 12AX7 works well in any amp. This versatile tube sounds excellent in clean amps offering an amazing dynamic response while also proving itself in high gain amps with its low noise and noticeably less microphonic issues than other tubes. The warm highs and transparent lows make it a great choice for any position in a tube amp. The JJ 12AX7 is the go-to tube of many amp builders and touring musicians.
Accessory Items:
| Pin Type | Our Part Number | UPC/EAN | JJ Electronics Part Number |
|---|---|---|---|
| Gold | T-12AX7-GOLD-JJ | 797734820959 | ECC83S / 12AX7, 7025 - GOLD |
| Regular | T-12AX7-S-JJ | 844632022081 | ECC83S - 12AX7, 7025 |
| Body Height | 49.2 mm | ||
| Cathode Current (Ik) | ≤ 8 mA | ||
| Filament Current (If) | 300 / 150 mA | ||
| Filament Voltage (Uf) | 6.3 / 12.6 V | ||
| Gain (μ) | 100 | ||
| Grid Circuit Resistance (Rg) | 2.2 MΩ | ||
| Grid Voltage (Ug) | ≥ -50 V, -2 V typical | ||
| Heater to cathode resistance (Rk/f) | 150 kΩ | ||
| Heater to cathode voltage (Uk/f) | ≤ 180 V | ||
| Internal Resistance (Ri) | 62.5 kΩ | ||
| Item Diameter | 22 mm | ||
| Item Height | 56.3 mm | ||
| Plate Current (Ia) | 1.2 mA | ||
| Plate Dissipation (Wa) | ≤ 1 W | ||
| Plate Voltage (Ua) | ≤ 300 V, 250 V typical | ||
| Transconductance (S) | 1.6 mA/V | ||
| Packaging Dimensions | 1 in. × 1 in. × 2.5 in. | ||
| Weight (Packaging) | 0.0287 lbs. | ||
| T-12AX7-S-JJ - Regular version | Body Height | 49.2 mm |
| Cathode Current (Ik) | ≤ 8 mA | |
| Filament Current (If) | 300 / 150 mA | |
| Filament Voltage (Uf) | 6.3 / 12.6 V | |
| Gain (μ) | 100 | |
| Grid Circuit Resistance (Rg) | 2.2 MΩ | |
| Grid Voltage (Ug) | ≥ -50 V, -2 V typical | |
| Heater to cathode resistance (Rk/f) | 150 kΩ | |
| Heater to cathode voltage (Uk/f) | ≤ 180 V | |
| Internal Resistance (Ri) | 62.5 kΩ | |
| Item Diameter | 22 mm | |
| Item Height | 56.3 mm | |
| Plate Current (Ia) | 1.2 mA | |
| Plate Dissipation (Wa) | ≤ 1 W | |
| Plate Voltage (Ua) | ≤ 300 V, 250 V typical | |
| Transconductance (S) | 1.6 mA/V | |
| T-12AX7-GOLD-JJ - Gold version | Body Height | 49.2 mm |
| Cathode Current (Ik) | ≤ 8 mA | |
| Filament Current (If) | 300 / 150 mA | |
| Filament Voltage (Uf) | 6.3 / 12.6 V | |
| Gain (μ) | 100 | |
| Grid Circuit Resistance (Rg) | 2.2 MΩ | |
| Grid Voltage (Ug) | ≥ -50 V, -2 V typical | |
| Heater to cathode resistance (Rk/f) | 150 kΩ | |
| Heater to cathode voltage (Uk/f) | ≤ 180 V | |
| Internal Resistance (Ri) | 62.5 kΩ | |
| Item Diameter | 22 mm | |
| Item Height | 56.3 mm | |
| Plate Current (Ia) | 1.2 mA | |
| Plate Dissipation (Wa) | ≤ 1 W | |
| Plate Voltage (Ua) | ≤ 300 V, 250 V typical | |
| Transconductance (S) | 1.6 mA/V |
 Specification Sheet for Regular | T-12AX7-S-JJ |
| Specification Sheet for Gold | T-12AX7-GOLD-JJ |
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Product Reviews
The JJs are the only tubes that I'll put in my Fenders. Smooth clean and warm is how they sound. I used to okay with the EH and Sovtek stuff but it was too harsh for my ears. Thanks JJ!
The JJ 12AX7's are not my favourite tube in marshall circuits. They tend to be a little too clean and bright. I need something with more distortion
For the low price this is one of the best 12AX7's around.
I just received three of these and put them my 73 Marshall 50 watt amp. They are everything I have read about them. Plenty of gain, with less noise, and less raspy than regular JJ's. They are great sounding tubes! Only three days from Tempe, Arizona to Lubbock, Texas via First Class mail and well packed. No need to pay extra for express shipping unless unless you need them in a hurry. Now I want to try the gold pin 803's and put the 83's in my combo amps. Thanks, from a native Texan but one time Arizonian.
Great sound!
Out of all the 12AX7's out there this one is nice and warm and very smooth
Out of all of the current production 12AX7's, I think this is the best. I've used these in guitar amps (Ampeg VT-22) and hi-fi gear (Fisher 400C). It is a clean sounding tube.