Vacuum Tube - EL84, Tube Amp Doctor

Vacuum Tube - EL84, Tube Amp Doctor

Tube Amp Doctor (TAD)
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In Stock

Tube Amp Doctor opted for the thickest glass possible and the heaviest construction available, just like the Russian EL84M, and combined these features with the sonically most promising cathode plate options, in order to meet and exceed the tonal quality of the EL84-Cz. Finally, Tube Amp Doctor added the gold grid wire in order to improve overall reliability. The sound can be described as very harmonic in the middle and treble frequencies, without adding too much power to the bass. The result is the best EL84 in current production.

No Compromise!

Q: When does a power tube become a Premium Selected power tube?
A: All power tubes labeled Premium Selected have passed the following tests:
- Plate Current (PC) and Amplification (TC)
- Low Noise Test
- Microphonic Test
- Sonic Tests
- Shock Tests
- Listening Tests
- Shorts & Leakage Tests

SKU:
T-EL84-TAD-X
Item ID:
004858
Brand:
Tube Amp Doctor (TAD)
Type:
Part Numbers
Single or MatchedOur Part NumberUPC/EANTube Amp Doctor Part Number
Matched PairT-EL84-TAD-MP609722123457
Matched QuadT-EL84-TAD-MQ609722123464
SingleT-EL84-TAD609722123440 RT871
Product Measurements by Type
Body Height71 mm
Cathode to Heater Voltage≤ 100 V
D.C. Cathode Current, AF Power Amplifier65 mA
D.C. Plate Voltage, AF Power Amplifier420 V
Grid 1 (control) Voltage, Af Power Amplifier-100 V
Grid 1 Control Voltage, Class A1-4.8 V
Grid 1 to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 10.8 pF
Grid 1 to Plate Capacitance< 0.5 pF
Grid 2 Dc (screen) Dissipation, Af Power Amplifier2 W
Grid 2 Dc (screen) Voltage, Af Power Amplifier300 V
Grid 2 Screen Voltage, Class A1250 V
Heater Current0.76 A
Heater Voltage5.8 V - 6.8 V, 6.3 V nominal
Item Diameter22.5 mm
Item Height77 mm
Load Resistance, Class A15.2 kΩ
Output Power (POut) @ 5% Distortion, Class A15.7 W
Peak AF Grid 1 Control Voltage, Class A114 V
Plate Dissipation, AF power amplifier (Wa)12 W
Plate Voltage, class A1 (Ua)250 V
Plate to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 6.5 pF
Signal Plate Current, Class A1, maximum80 mA
Transconductance, Class A1 (S)9 mA/V
Zero Signal Grid 2 Screen Current, Class A110.8 mA
Zero Signal Plate Current, Class A149.5 mA
Packaging Information
Packaging DimensionsMatched Pair versionT-EL84-TAD-MP1 in. × 2 in. × 3.3 in.
Matched Quad versionT-EL84-TAD-MQ1 in. × 4 in. × 3.3 in.
Single versionT-EL84-TAD3.25 in. × 1 in. × 1 in.
Weight (Packaging)Matched Pair versionT-EL84-TAD-MP0.1 lbs.
Matched Quad versionT-EL84-TAD-MQ0.2 lbs.
Single versionT-EL84-TAD0.05 lbs.
Product Measurements by Item
T-EL84-TAD - Single versionBody Height71 mm
Cathode to Heater Voltage≤ 100 V
D.C. Cathode Current, AF Power Amplifier65 mA
D.C. Plate Voltage, AF Power Amplifier420 V
Grid 1 (control) Voltage, Af Power Amplifier-100 V
Grid 1 Control Voltage, Class A1-4.8 V
Grid 1 to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 10.8 pF
Grid 1 to Plate Capacitance< 0.5 pF
Grid 2 Dc (screen) Dissipation, Af Power Amplifier2 W
Grid 2 Dc (screen) Voltage, Af Power Amplifier300 V
Grid 2 Screen Voltage, Class A1250 V
Heater Current0.76 A
Heater Voltage5.8 V - 6.8 V, 6.3 V nominal
Item Diameter22.5 mm
Item Height77 mm
Load Resistance, Class A15.2 kΩ
Output Power (POut) @ 5% Distortion, Class A15.7 W
Peak AF Grid 1 Control Voltage, Class A114 V
Plate Dissipation, AF power amplifier (Wa)12 W
Plate Voltage, class A1 (Ua)250 V
Plate to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 6.5 pF
Signal Plate Current, Class A1, maximum80 mA
Transconductance, Class A1 (S)9 mA/V
Zero Signal Grid 2 Screen Current, Class A110.8 mA
Zero Signal Plate Current, Class A149.5 mA
T-EL84-TAD-MP - Matched Pair versionBody Height71 mm
Cathode to Heater Voltage≤ 100 V
D.C. Cathode Current, AF Power Amplifier65 mA
D.C. Plate Voltage, AF Power Amplifier420 V
Grid 1 (control) Voltage, Af Power Amplifier-100 V
Grid 1 Control Voltage, Class A1-4.8 V
Grid 1 to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 10.8 pF
Grid 1 to Plate Capacitance< 0.5 pF
Grid 2 Dc (screen) Dissipation, Af Power Amplifier2 W
Grid 2 Dc (screen) Voltage, Af Power Amplifier300 V
Grid 2 Screen Voltage, Class A1250 V
Heater Current0.76 A
Heater Voltage5.8 V - 6.8 V, 6.3 V nominal
Item Diameter22.5 mm
Item Height77 mm
Load Resistance, Class A15.2 kΩ
Output Power (POut) @ 5% Distortion, Class A15.7 W
Peak AF Grid 1 Control Voltage, Class A114 V
Plate Dissipation, AF power amplifier (Wa)12 W
Plate Voltage, class A1 (Ua)250 V
Plate to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 6.5 pF
Signal Plate Current, Class A1, maximum80 mA
Transconductance, Class A1 (S)9 mA/V
Zero Signal Grid 2 Screen Current, Class A110.8 mA
Zero Signal Plate Current, Class A149.5 mA
T-EL84-TAD-MQ - Matched Quad versionBody Height71 mm
Cathode to Heater Voltage≤ 100 V
D.C. Cathode Current, AF Power Amplifier65 mA
D.C. Plate Voltage, AF Power Amplifier420 V
Grid 1 (control) Voltage, Af Power Amplifier-100 V
Grid 1 Control Voltage, Class A1-4.8 V
Grid 1 to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 10.8 pF
Grid 1 to Plate Capacitance< 0.5 pF
Grid 2 Dc (screen) Dissipation, Af Power Amplifier2 W
Grid 2 Dc (screen) Voltage, Af Power Amplifier300 V
Grid 2 Screen Voltage, Class A1250 V
Heater Current0.76 A
Heater Voltage5.8 V - 6.8 V, 6.3 V nominal
Item Diameter22.5 mm
Item Height77 mm
Load Resistance, Class A15.2 kΩ
Output Power (POut) @ 5% Distortion, Class A15.7 W
Peak AF Grid 1 Control Voltage, Class A114 V
Plate Dissipation, AF power amplifier (Wa)12 W
Plate Voltage, class A1 (Ua)250 V
Plate to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 6.5 pF
Signal Plate Current, Class A1, maximum80 mA
Transconductance, Class A1 (S)9 mA/V
Zero Signal Grid 2 Screen Current, Class A110.8 mA
Zero Signal Plate Current, Class A149.5 mA

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PDF: Specification Sheet Specification Sheet485.22 KB