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Vacuum Tube - KT66, JJ Electronics
The JJ Electronic KT66 is a sonically faithful reproduction of the original tubes with a robust construction encased in a thick glass envelope. The JJ KT66 delivers a powerful 25 Watts with plenty of headroom. This tube has a tone that is warm, thick, and straightforward. With a more balanced sound than the 6L6GC, the JJ KT66 is an excellent choice for a full bodied tone.
Matched versions of this tube use Apex Matching
RoHS Compliant
| Single or Matched | Our Part Number | UPC/EAN |
|---|---|---|
| Apex Matched Pair | T-KT66-JJ-MP | 609722123136 |
| Apex Matched Quad | T-KT66-JJ-MQ | 609722123143 |
| Single | T-KT66-JJ | 609722123129 |
| Body Height | 110 mm | |
| Cathode Current (Ik) | ≤ 150 mA | |
| Filament Current (If) | 1.3 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Grid 1 voltage (Ug1) | ≥ -200 V, -15 V typical | |
| Grid 2 current (Ig2) | ≤ 7 mA | |
| Grid 2 dissipation (Wg2) | 3.5 W | |
| Grid 2 voltage (Ug2) | ≤ 550 V, 250 V typical | |
| Grid capacitance (cg1) | 16 pF | |
| Grid to Plate Capacitance (ca/g) | 2.3 pF | |
| Internal Resistance (Ri) | 22.5 kΩ | |
| Item Diameter | 52 mm | |
| Item Height | 125 mm | |
| Plate Capacitance (ca) | 10 pF | |
| Plate Current (Ia) | 85 mA | |
| Plate Dissipation (Wa) | ≤ 25 W | |
| Plate Voltage (Ua) | ≤ 550 V, 250 V typical | |
| Transconductance (S) | 6 mA/V |
| Packaging Dimensions | Apex Matched Pair version | T-KT66-JJ-MP | 5.3 in. × 4.5 in. × 2.3 in. |
| Apex Matched Quad version | T-KT66-JJ-MQ | 5.3 in. × 4.5 in. × 4.5 in. | |
| Single version | T-KT66-JJ | 2.3 in. × 2.3 in. × 5.3 in. | |
| Weight (Packaging) | Apex Matched Pair version | T-KT66-JJ-MP | 0.512 lbs. |
| Apex Matched Quad version | T-KT66-JJ-MQ | 1.024 lbs. | |
| Single version | T-KT66-JJ | 0.256 lbs. |
| T-KT66-JJ-MP - Apex Matched Pair version | Body Height | 110 mm |
| Cathode Current (Ik) | ≤ 150 mA | |
| Filament Current (If) | 1.3 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Grid 1 voltage (Ug1) | ≥ -200 V, -15 V typical | |
| Grid 2 current (Ig2) | ≤ 7 mA | |
| Grid 2 dissipation (Wg2) | 3.5 W | |
| Grid 2 voltage (Ug2) | ≤ 550 V, 250 V typical | |
| Grid capacitance (cg1) | 16 pF | |
| Grid to Plate Capacitance (ca/g) | 2.3 pF | |
| Internal Resistance (Ri) | 22.5 kΩ | |
| Item Diameter | 52 mm | |
| Item Height | 125 mm | |
| Plate Capacitance (ca) | 10 pF | |
| Plate Current (Ia) | 85 mA | |
| Plate Dissipation (Wa) | ≤ 25 W | |
| Plate Voltage (Ua) | ≤ 550 V, 250 V typical | |
| Transconductance (S) | 6 mA/V | |
| T-KT66-JJ-MQ - Apex Matched Quad version | Body Height | 110 mm |
| Cathode Current (Ik) | ≤ 150 mA | |
| Filament Current (If) | 1.3 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Grid 1 voltage (Ug1) | ≥ -200 V, -15 V typical | |
| Grid 2 current (Ig2) | ≤ 7 mA | |
| Grid 2 dissipation (Wg2) | 3.5 W | |
| Grid 2 voltage (Ug2) | ≤ 550 V, 250 V typical | |
| Grid capacitance (cg1) | 16 pF | |
| Grid to Plate Capacitance (ca/g) | 2.3 pF | |
| Internal Resistance (Ri) | 22.5 kΩ | |
| Item Diameter | 52 mm | |
| Item Height | 125 mm | |
| Plate Capacitance (ca) | 10 pF | |
| Plate Current (Ia) | 85 mA | |
| Plate Dissipation (Wa) | ≤ 25 W | |
| Plate Voltage (Ua) | ≤ 550 V, 250 V typical | |
| Transconductance (S) | 6 mA/V | |
| T-KT66-JJ - Single version | Body Height | 110 mm |
| Cathode Current (Ik) | ≤ 150 mA | |
| Filament Current (If) | 1.3 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Grid 1 voltage (Ug1) | ≥ -200 V, -15 V typical | |
| Grid 2 current (Ig2) | ≤ 7 mA | |
| Grid 2 dissipation (Wg2) | 3.5 W | |
| Grid 2 voltage (Ug2) | ≤ 550 V, 250 V typical | |
| Grid capacitance (cg1) | 16 pF | |
| Grid to Plate Capacitance (ca/g) | 2.3 pF | |
| Internal Resistance (Ri) | 22.5 kΩ | |
| Item Diameter | 52 mm | |
| Item Height | 125 mm | |
| Plate Capacitance (ca) | 10 pF | |
| Plate Current (Ia) | 85 mA | |
| Plate Dissipation (Wa) | ≤ 25 W | |
| Plate Voltage (Ua) | ≤ 550 V, 250 V typical | |
| Transconductance (S) | 6 mA/V |
 Specification Sheet | All Models |
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