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
Just swapped with the old ones in my 1964 Fender Bassman Amp and they work great.
Rick
Its a good quality tube for a good price. I use one of these in my old magnatone. It has nice warmth and clarity, kind of hard to go wrong with this tube.
Thanks very much for prompt delivery and very happy with purchase of valves. Regards, Robert
I agree with the other reviewers that said that this pre-amp tube has a warmer sound than some. It is not outrageously priced and really delivers.
As usual my order for 4 X 12AX7's arrived promptly and are of excellent quality.
I just can't beat your value or service throughout the world.
Best value, best quality, best service.
Now been dealing with you for years.
Why would you go anywhere else?
Lindsay
Great product, highly recommended, brought the Randall up a few notches in overall response, along with power tube swap.
JJ all day!
Thanks for the great prices, too!
Good price for JJ 12AX7/ECC83, good quality
Great clean sound. I put these in my Blackheart BH5-112 which I use every weekend to gig with and mic up. Can pretty much play anywhere with this setup. Great price on tubes.
good product...good quality, perfect
Bought them for the Preamp section of my Krank Rev Jr Pro 50W. They work like a charm, mainly in the dirty preamp tubes. Very reliable and an excellent value for money. Shipping is just awesome, took 13 days to arrive to Santiago, Chile. Fabulous.