TAD EL34-STR REDBASE
The New EL34 Standard
The new TAD EL34-STR REDBASE™ developed completely from scratch! Yet, the results are phenomenal.
In the tradition of the legendary Telefunken EL34, the TAD EL34-STR REDBASE™ provides a gorgeous, dynamic and amazingly open in-yer-face tone with just the right amount of angriness. Expect a clear, harmonic and open top end, a lovely spot-on midrange, with vocal low-mids and a great bass response as you would expect it from a TAD EL34.
Extra rugged glass envelope, golden control grid wire, two especially large cooling grids and special high-precision construction with smallest tolerances guarantee for maximum stability and reliability.
The TAD EL34-STR REDBASE™ differs from other EL34 tubes in particular also by the extreme quality control in the production and the special formatting of the tubes by TAD in Germany before the actual matching.
The TAD EL34-STR REDBASE™ can be used for any EL-34 and also instead of 6CA7 and KT77
It is therefore ideal for guitar amplifiers as well as for Hi-Fi equipment.
TAD EL34 REDBASE™ Provides Classic EL34 Sound - Excellent Tone and Maximum Lifetime!
TAD Premium Selection
Q: When does a power tube become a Premium Selected power tube?
A: All power tubes labelled Premium Selected have passed the following tests:
- Plate Current (PC) and Amplification (TC)
- Low Noise Test
- Microphonic Test
- Sonic Test
- Shock Test
- Listening Test
- Shorts & Leakage Test
Premium RT-Matching of Power Tubes
Our Premium Matching is an exact matching of power tubes with identical Plate Current (PC) and Transconductance (TC).
| Electrical Characteristics | |
| Heater Voltage (AC or DC) | Minimum: 5.8 V, Nominal: 6.3 V, Maxium: 6.7 V |
| Heater Current | 1.5 A |
| Cathode | Oxide-Coated, Unipotential |
| Cathode-to-Heater Potential, Max. | 100 V |
| Direct Interelectrode Capacitance, Max.* | Grid No. 1 to Cathode and Grid No. 3, Grid No. 2, Base Sleeve and Heater: <16.0 pF / Plate to Cathode and Grid No. 3, Grid No. 2, Base sleeve and Heater: <9.0 pF / Grid No. 1 to Plate: <1.8 pF |
* Without external shielding, nominal values.
| Mechanical | |
| Operating Position | Vertical |
| Base | JEDEC #8ET, Octal, 8-Pin |
| Dimensions - Height | 115 mm (4.527”) |
| Dimensions - Seated Height | 102 mm (4.016”) |
| Dimensions - Diameter | 34 mm (1.339”) |
| Cooling | Convection |
| Approximate Net Weight | 50 g (1.76 oz.) |
| AF Power Amplifier Maximum Ratings | |
| DC Plate Voltage | 800 V |
| Grid No. 2 DC (Screen) Voltage | 500 V |
| Grid No. 1 DC (Control) Voltage | -100 V |
| DC Cathode Current | 150 mA |
| Plate Dissipation | 25 W |
| Grid No. 2 DC (Screen) Dissipation | 8 W |
| Typical Operatation - AF Power Amplifier, Class A1 (Single Tube) | |
| Plate Voltage | 265 V |
| Grid 2 Screen Voltage | 250 V |
| Grid 1 Control Voltage** | -12.5 V |
| Peak AF Grid 1 Control Voltage | 8.7 V |
| Zero Signal Plate Current | 100 mA |
| Maximum Signal Plate Current | 100 mA |
| Zero Signal Grid 2 Screen Current (Avg.) | 12.9 mA |
| Transconductance (Nominal) | 11,000 mS |
| Load Resistance | 2 kΩ |
| Output Power at 13% Distortion | 10 W |
** Approximate value (set to zero signal plate current).
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