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Vacuum Tube - EL34-STR, Redbase, Tube Amp Doctor

Vacuum Tube - EL34-STR, Redbase, Tube Amp Doctor

Tube Amp Doctor (TAD)
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The TAD EL34-STR REDBASE™ is a glass envelope pentode with a plate dissipation rating of 25 Watts with convection cooling. It is intended for audio frequency power amplification service in either pentode, ultralinear or triode connection and single ended or push-pull/parallel applications.

The TAD EL34-STR REDBASE™ is designed to be a direct replacement for any EL34 / 6CA7 / KT77 or equivalent. Close manufacturing specification tolerances, gold wire grid, improved processing and final testing and QC at TAD in Germany provides enhanced reliability, superior sonic performance and grants overall consistency. TAD EL34-STR REDBASE™ provides electrical and audio performance very similar to that of the original Telefunken EL34.

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-EL34-RB-TAD
Item ID:
045606
Brand:
Tube Amp Doctor (TAD)
Type:
Power
RoHS Compliant
Part Numbers
Single or MatchedOur Part NumberUPC/EANTube Amp Doctor Part Number
SingleT-EL34-RB-TAD841358118999 RT161
Matched PairT-EL34-RB-TAD-MP RT161
Matched QuadT-EL34-RB-TAD-MQ RT161
Approximate net weightSingle versionT-EL34-RB-TAD50 g (1.76oz.)
BaseSingle versionT-EL34-RB-TADJEDEC #8ET, octal, 8-pin
CathodeSingle versionT-EL34-RB-TADOxide-coated, unipotential
DiameterSingle versionT-EL34-RB-TAD34 mm (1.339”)
HeightSingle versionT-EL34-RB-TAD115 mm (4.527”)
Max. DC cathode currentSingle versionT-EL34-RB-TAD150 mA
Max. DC plate voltageSingle versionT-EL34-RB-TAD800 V
Max. Grid no.1 (control) voltageSingle versionT-EL34-RB-TAD-100 V
Max. Grid no.2 DC (screen) dissipationSingle versionT-EL34-RB-TAD8 W
Max. Grid no.2 DC (screen) voltageSingle versionT-EL34-RB-TAD500 V
Max. Heater CurrentSingle versionT-EL34-RB-TADca. 1.5 A
Max. Heater VoltageSingle versionT-EL34-RB-TAD6.7 V
Max. Plate dissipationSingle versionT-EL34-RB-TAD25 W
Min. Heater VoltageSingle versionT-EL34-RB-TAD5.8 V
Nom. Heater VoltageSingle versionT-EL34-RB-TAD6.3 V
Operating PositionSingle versionT-EL34-RB-TADvertical only
Seated heightSingle versionT-EL34-RB-TAD102 mm (4.016”)
Typ. Grid 1 Control VoltageSingle versionT-EL34-RB-TAD-12.5 V
Typ. Grid 2 Screen VoltageSingle versionT-EL34-RB-TAD250 V
Typ. Load ResistanceSingle versionT-EL34-RB-TAD2k Ohms
Typ. Maximum Signal Plate CurrentSingle versionT-EL34-RB-TAD100 mA
Typ. Output Power at 13% distortionSingle versionT-EL34-RB-TAD10 W
Typ. Peak AF Grid 1 Control VoltageSingle versionT-EL34-RB-TAD8.7 V
Typ. Plate VoltageSingle versionT-EL34-RB-TAD265 V
Typ. Transconductance (nominal)Single versionT-EL34-RB-TAD11,000 mS
Typ. Zero Signal Grid 2 Screen Current (avg.)Single versionT-EL34-RB-TAD12.9 mA
Typ. Zero Signal Plate CurrentSingle versionT-EL34-RB-TAD100 mA
Packaging Information
Packaging DimensionsMatched Pair versionT-EL34-RB-TAD-MP7.25 in. × 3.5 in. × 1.75 in.
Matched Quad versionT-EL34-RB-TAD-MQ7.5 in. × 4.25 in. × 1.75 in.
Single versionT-EL34-RB-TAD4.625 in. × 1.75 in. × 1.75 in.
Weight (Packaging)Matched Pair versionT-EL34-RB-TAD-MP0.2866 lbs.
Matched Quad versionT-EL34-RB-TAD-MQ0.5732 lbs.
Single versionT-EL34-RB-TAD0.1433 lbs.
T-EL34-RB-TAD - Single versionApproximate net weight50 g (1.76oz.)
BaseJEDEC #8ET, octal, 8-pin
CathodeOxide-coated, unipotential
Diameter34 mm (1.339”)
Height115 mm (4.527”)
Max. DC cathode current150 mA
Max. DC plate voltage800 V
Max. Grid no.1 (control) voltage-100 V
Max. Grid no.2 DC (screen) dissipation8 W
Max. Grid no.2 DC (screen) voltage500 V
Max. Heater Currentca. 1.5 A
Max. Heater Voltage6.7 V
Max. Plate dissipation25 W
Min. Heater Voltage5.8 V
Nom. Heater Voltage6.3 V
Operating Positionvertical only
Seated height102 mm (4.016”)
Typ. Grid 1 Control Voltage-12.5 V
Typ. Grid 2 Screen Voltage250 V
Typ. Load Resistance2k Ohms
Typ. Maximum Signal Plate Current100 mA
Typ. Output Power at 13% distortion10 W
Typ. Peak AF Grid 1 Control Voltage8.7 V
Typ. Plate Voltage265 V
Typ. Transconductance (nominal)11,000 mS
Typ. Zero Signal Grid 2 Screen Current (avg.)12.9 mA
Typ. Zero Signal Plate Current100 mA
PDF: Datasheet for SingleT-EL34-RB-TAD

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Specifications, Files, and Documents

PDF: Datasheet for Single (T-EL34-RB-TAD)Datasheet for Single330.46 KB
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