TAD EL34L-Cz
Punchy Mids and Focused Power
The E34L is a long-life EL34 type tube with thick and especially solid glass. It delivers lots of bite in the top end, punchy mids and well-focussed bass power. A wonderful EL34, with great tone for Hi-Fi as well as for musical instrument amplifications.
Our burn-in process increases the electrical stability of this tube immensely. This increased stability is the basis for our subsequent matching process. Our TAD matching-process takes into account the dynamic aspects of tubes and allows for precise matching under real operating conditions. This process enables us to achieve an unparalleled sound quality.
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: <15.5 pF / Plate to Cathode and Grid No. 3, Grid No. 2, Base sleeve and Heater: <1.0 pF / Grid No. 1 to Plate: <1.3 pF |
* Without external shielding, nominal values.
| Mechanical | |
| Operating Position | Any |
| Base | Octal, 8-Pin |
| Dimensions - Height | 112 mm (4.41”) |
| Dimensions - Seated Height | 98 mm (3.86”) |
| Dimensions - Diameter | 33.3 mm (1.31”) |
| Cooling | Convection |
| Approximate Net Weight | 60 g (2.1 oz.) |
| AF Power Amplifier Maximum Ratings | |
| DC Plate Voltage | 800 V |
| Grid No. 2 DC (Screen) Voltage | 450 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 |
| Bulb Temperature (Surface Hottest Point) | 250° C |
| Typical Operatation - AF Power Amplifier, Class A1 (Single Tube) | |
| Plate Voltage | 250 V |
| Grid 2 Screen Voltage | 250 V |
| Grid 1 Control Voltage** | -15 V |
| Zero Signal Plate Current | 100 mA |
| Maximum Signal Plate Current | 105 mA |
| Zero Signal Grid 2 Screen Current (Avg.) | 15 mA |
| Transconductance (Nominal) | 10,000 mS |
| Load Resistance | 2 kΩ |
| Output Power at 5% Distortion | 10 W |
** Approximate value (set to zero signal plate current).
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