# Vacuum Tube - EL844, JJ Electronics

- Apex Matched Pair (T-EL844-JJ-MP)
- Apex Matched Quad (T-EL844-JJ-MQ)

The JJ Electronic EL844 is a variation on the classic tube which reduces the overall headroom by 25%. With the reduced power, hitting that rich distortion that the EL84 is notorious for is more manageable. This tube will hit full saturated power tube sounds without having to crank the amps volume as high which makes them a great choice for recording as well as home / bedroom use.

Matched versions of this tube use Apex Matching

RoHS Compliant

Single or Matched | Our Part Number | UPC/EAN |
---|---|---|

Apex Matched Pair | T-EL844-JJ-MP | 609722127455 |

Apex Matched Quad | T-EL844-JJ-MQ | 609722127462 |

Single | T-EL844-JJ | 609722127448 |

Body Height | 71.4 mm | |

Cathode Current (I_{k}) | ≤ 60 mA | |

Filament Current (I_{f}) | 0.76 A | |

Filament Voltage (U_{f}) | 6.3 V | |

Grid 1 to filament capacitance (c_{g1f}) | 0.15 pF | |

Grid Circuit Resistance 1 (R_{g1}), Automatic Bias | 1 MΩ | |

Grid Circuit Resistance 1 (R_{g1}), Fixed Bias | 0.5 MΩ | |

Grid Voltage 1 (U_{g1}) | ≥ -100 V, -7.3 V typical | |

Grid Voltage 2 (U_{g2}) | ≤ 300 V, 250 V typical | |

Grid to Cathode Capacitance (c_{g/k}) | 10.8 pF | |

Grid to Plate Capacitance (c_{a/g}) | 0.1 pF | |

Heater to cathode voltage (U_{k/f}) | ≤ 100 V | |

Internal Resistance (R_{i}) | 0.1 MΩ | |

Item Diameter | 22 mm | |

Item Height | 77.8 mm | |

Plate Capacitance (c_{a}) | 6.6 pF | |

Plate Current (I_{a}) | 10 mA | |

Plate Dissipation (W_{a}) | ≤ 9 W | |

Plate Voltage (U_{a}) | ≤ 300 V, 250 V typical | |

Transconductance (S) | 6.5 mA/V |

Packaging Dimensions | Apex Matched Pair version | T-EL844-JJ-MP | 3.6 in. × 2 in. × 1 in. |

Apex Matched Quad version | T-EL844-JJ-MQ | 3.6 in. × 2 in. × 2 in. | |

Single version | T-EL844-JJ | 1 in. × 1 in. × 3.6 in. | |

Weight (Packaging) | Apex Matched Pair version | T-EL844-JJ-MP | 0.08 lbs. |

Apex Matched Quad version | T-EL844-JJ-MQ | 0.16 lbs. | |

Single version | T-EL844-JJ | 0.04 lbs. |

T-EL844-JJ-MP - Apex Matched Pair version | Body Height | 71.4 mm |

Cathode Current (I_{k}) | ≤ 60 mA | |

Filament Current (I_{f}) | 0.76 A | |

Filament Voltage (U_{f}) | 6.3 V | |

Grid 1 to filament capacitance (c_{g1f}) | 0.15 pF | |

Grid Circuit Resistance 1 (R_{g1}), Automatic Bias | 1 MΩ | |

Grid Circuit Resistance 1 (R_{g1}), Fixed Bias | 0.5 MΩ | |

Grid Voltage 1 (U_{g1}) | ≥ -100 V, -7.3 V typical | |

Grid Voltage 2 (U_{g2}) | ≤ 300 V, 250 V typical | |

Grid to Cathode Capacitance (c_{g/k}) | 10.8 pF | |

Grid to Plate Capacitance (c_{a/g}) | 0.1 pF | |

Heater to cathode voltage (U_{k/f}) | ≤ 100 V | |

Internal Resistance (R_{i}) | 0.1 MΩ | |

Item Diameter | 22 mm | |

Item Height | 77.8 mm | |

Plate Capacitance (c_{a}) | 6.6 pF | |

Plate Current (I_{a}) | 10 mA | |

Plate Dissipation (W_{a}) | ≤ 9 W | |

Plate Voltage (U_{a}) | ≤ 300 V, 250 V typical | |

Transconductance (S) | 6.5 mA/V | |

T-EL844-JJ-MQ - Apex Matched Quad version | Body Height | 71.4 mm |

Cathode Current (I_{k}) | ≤ 60 mA | |

Filament Current (I_{f}) | 0.76 A | |

Filament Voltage (U_{f}) | 6.3 V | |

Grid 1 to filament capacitance (c_{g1f}) | 0.15 pF | |

Grid Circuit Resistance 1 (R_{g1}), Automatic Bias | 1 MΩ | |

Grid Circuit Resistance 1 (R_{g1}), Fixed Bias | 0.5 MΩ | |

Grid Voltage 1 (U_{g1}) | ≥ -100 V, -7.3 V typical | |

Grid Voltage 2 (U_{g2}) | ≤ 300 V, 250 V typical | |

Grid to Cathode Capacitance (c_{g/k}) | 10.8 pF | |

Grid to Plate Capacitance (c_{a/g}) | 0.1 pF | |

Heater to cathode voltage (U_{k/f}) | ≤ 100 V | |

Internal Resistance (R_{i}) | 0.1 MΩ | |

Item Diameter | 22 mm | |

Item Height | 77.8 mm | |

Plate Capacitance (c_{a}) | 6.6 pF | |

Plate Current (I_{a}) | 10 mA | |

Plate Dissipation (W_{a}) | ≤ 9 W | |

Plate Voltage (U_{a}) | ≤ 300 V, 250 V typical | |

Transconductance (S) | 6.5 mA/V | |

T-EL844-JJ - Single version | Body Height | 71.4 mm |

Cathode Current (I_{k}) | ≤ 60 mA | |

Filament Current (I_{f}) | 0.76 A | |

Filament Voltage (U_{f}) | 6.3 V | |

Grid 1 to filament capacitance (c_{g1f}) | 0.15 pF | |

Grid Circuit Resistance 1 (R_{g1}), Automatic Bias | 1 MΩ | |

Grid Circuit Resistance 1 (R_{g1}), Fixed Bias | 0.5 MΩ | |

Grid Voltage 1 (U_{g1}) | ≥ -100 V, -7.3 V typical | |

Grid Voltage 2 (U_{g2}) | ≤ 300 V, 250 V typical | |

Grid to Cathode Capacitance (c_{g/k}) | 10.8 pF | |

Grid to Plate Capacitance (c_{a/g}) | 0.1 pF | |

Heater to cathode voltage (U_{k/f}) | ≤ 100 V | |

Internal Resistance (R_{i}) | 0.1 MΩ | |

Item Diameter | 22 mm | |

Item Height | 77.8 mm | |

Plate Capacitance (c_{a}) | 6.6 pF | |

Plate Current (I_{a}) | 10 mA | |

Plate Dissipation (W_{a}) | ≤ 9 W | |

Plate Voltage (U_{a}) | ≤ 300 V, 250 V typical | |

Transconductance (S) | 6.5 mA/V |

Specification Sheet | All Models |