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Vacuum Tube - ECC823, JJ Electronics, Dual Triode
In the ECC823, Section 1 of the tube (pins 6, 7, and 8) is the low gain 12AU7/ECC82 spec (gain factor 17) and Section 2 (pins 1, 2, and 3) is the high gain 12AX7/ECC83 spec (gain factor 100).
| ECC823 (T-ECC823-JJ) | ||
| Section 1 | Section 2 | |
| Pins | 6, 7, 8 | 1, 2, 3 |
| Gain | Factor of 17 | Factor of 100 |
| Spec | 12AU7/ECC82 | 12AX7/ECC83 |
| ECC832 (T-12DW7-JJ-X) | ||
| Section 1 | Section 2 | |
| Pins | 6, 7, 8 | 1, 2, 3 |
| Gain | Factor of 100 | Factor of 17 |
| Spec | 12AX7/ECC83 | 12AU7/ECC82 |
RoHS Compliant
SKU:
T-ECC823-JJ
Item ID:
004834
UPC/EAN:
841358102363
JJ Electronics Part Number:
ECC823
Brand:
JJ Electronics
Type:
| Body Height | 49.2 mm | |
| Cathode Current, system I (Ik) | ≤ 8 mA | |
| Cathode Current, system II (Ik) | ≤ 20 mA | |
| Filament Current (If) | 300 / 150 mA | |
| Filament Voltage (Uf) | 6.3 / 12.6 V | |
| Gain, System I (μ) | 100 | |
| Gain, System Ii (μ) | 17 | |
| Grid Resistance, system I (Rg) | 2.2 MΩ | |
| Grid Resistance, system II (Rg) | 1 MΩ | |
| Grid Voltage, system I (Ug) | ≥ -50 V, -2 V typical | |
| Grid Voltage, system II (Ug) | ≥ -50 V, -8.5 V typical | |
| Heater to cathode resistance, system I (Rk/f) | 150 kΩ | |
| Heater to cathode resistance, system II (Rk/f) | 150 kΩ | |
| Heater to cathode voltage, system I (Uk/f) | ≤ 180 V | |
| Heater to cathode voltage, system II (Uk/f) | ≤ 180 V | |
| Internal Resistance, system I (Ri) | 62.5 kΩ | |
| Internal Resistance, system II (Ri) | 7.7 kΩ | |
| Item Diameter | 22 mm | |
| Item Height | 56.3 mm | |
| Plate Current, system I (Ia) | 1.2 mA | |
| Plate Current, system II (Ia) | 10.5 mA | |
| Plate Dissipation, system I (Wa) | ≤ 1 W | |
| Plate Dissipation, system II (Wa) | ≤ 2.75 W | |
| Plate Voltage (Ua) | ≤ 300 V, 250 V typical | |
| Transconductance, system I (S) | 1.6 mA/V | |
| Transconductance, system II (S) | 2.2 mA/V |
| Packaging Dimensions | 0.875 in. × 0.875 in. × 1.25 in. | |
| Weight (Packaging) | 0.05 lbs. |
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Questions and Answers
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1 answers
Could you match a pair of these tubes?
Asked by Anonymous on October 12th, 2017.
At this time we do not offer balancing or matching services for preamp tubes.
1 answers
Is this tube two different gain stages? first being like a 12 ax7 and second like 12 au7?
Asked by Anonymous on October 12th, 2017.
Yes, this is much like a ECC832/12DW7 but reversed. The first stage would be high gain and the second stage lower gain.
1 answers
I need a tube where the triode on pins 6, 7 and 8 is the high-gain 12AX7 side, for V2B. And the section connecting to pins 1, 2 and 3 is the 12AU7 side, perfect for a cathode follower. Both your tube descriptions for the ECC832 / 12DW7 & 12DW7 / ECC832 indicate high gain 12AX7 on pins 1, 2, and 3. Help?
Asked by Anonymous on September 2nd, 2018.
September 5th, 2018
Staff Member
Although it can be interpreted in the ECC832 description that the first three pins are the high gain (12AX7) side, this isn't accurate. The first three pins of the ECC832 are the 12AU7 and pins 6, 7, and 8 are the high gain (12AX7) side of that tube. We hope this clears up any confusion.
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Product Reviews
It's a fine tube, made my Marshall DSl 15 C red channel usable and the green channel still has the gain factor it was designed to have. I recommend this tube.
Try My Current DSL40C Tube Load-Out. All Tubes Purchased Here:
V1 - JJ-ECC823
V2 - JJ-5751
V3 - JJ-ECC83-MG
V4 - TAD 7025-WA
Bought this tube on a recommendation from a colleague. It drastically dropped the gain factor on my Marshall DSL40C without reducing gain on the 'green' channel. It dramatically smoothed out the 'red' channel and allowed more saturation without getting muddy. Best ever DSL40C upgrade...