Telefunken EL84-TK Black Diamond Series Vacuum Tubes (Matched Pair)

BH #TEMPEL84TK • MFR #EL84-TK VACUUM TUBE MATCHED PAIR
Telefunken EL84-TK Black Diamond Series Vacuum Tubes (Matched Pair)
Key Features
  • Pentode Output Tubes
  • Ideal for Guitar Amps & Hi-Fi Gear
  • Ideal Replacement for EL84/6BQ5
  • Distinctive Chiming & Articulate Sound
This matched pair of Telefunken EL84-TK Black Diamond Series Vacuum Tubes is ideal for use in guitar amplifiers and hi-fi equipment in homes, studios, and live stage applications. For personal enjoyment or commercial recording, they grant a detailed, bell-like chime and clearly distinguished sound. In a smaller footprint than an EL34, these pentode tubes deliver a characteristic "British" tone and up to 17W of output power.
Special Order
Expected availability: 7-14 business days
$67.00

Important Notice

  • This item is noncancelable and nonreturnable.

Telefunken EL84-TK Black Diamond Series Vacuum Tubes (Matched Pair)

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Telefunken EL84-TK VACUUM TUBE MATCHED PAIR Overview

This matched pair of Telefunken EL84-TK Black Diamond Series Vacuum Tubes is ideal for use in guitar amplifiers and hi-fi equipment in homes, studios, and live stage applications. For personal enjoyment or commercial recording, they grant a detailed, bell-like chime and clearly distinguished sound. In a smaller footprint than an EL34, these pentode tubes deliver a characteristic "British" tone and up to 17W of output power.

Ideal replacement for any EL84/6BQ5 tube
Thermionic valve of the power pentode type
Great for guitar amplifiers and hi-fi equipment
Originally designed for the output stages of audio frequency amplifiers
Delivers up to 17W while remaining compact
Similar to an EL34 with a lower output power
When overdriven, EL84 power tubes contribute to a distinctive chiming and articulate sound when compared to 6L6 tubes
Each tube is meticulously measured for all critical parameters of performance including transconductance, gain, noise, and microphonics
Tubes are selected by hand, rigorously tested, subjected to an extended burn-in period for stability, and remeasured before final packing

Telefunken EL84-TK VACUUM TUBE MATCHED PAIR Specs

Mechanical
TypeR.F. output pentode
BaseNoval
Number of Pins9
Heater Requirements
Voltage6.3 V
Current760 mA
Direct Interelectrode Capacitances
CapacitanceGrid #1 to Cathode: 10 pF
Plate to All Except Grid #1: 5.1 pF
Grid #1 to Plate: 0.6 pF
Grid #1 to Heater: 0.15 pF
Maximum Ratings
VoltagePlate Voltage: 300 V
Grid #2: 300 V
Grid #1: -100 V
Cathode to Heater Voltage: 100 V
CurrentCathode Current: 65 mA
DissipationPlate Dissipation: 12 W
Grid #2 Dissipation: 2 W
ResistanceGrid #1 Resistor (Automatic Bias): 1 MOhm
Grid #1 Resistor (Fixed Bias): 0.3 MOhms
Typical Operation and Characteristics
VoltagePlate Voltage: 250 V
Grid #2 Voltage: 250 V
Grid #1 Voltage: -7.3 V
Grid #1 Driving Voltage (when PO = 50 mW): 0.3 V
Grid #1 Driving Voltage (when PO = 6 W): 4.3 V
CurrentPlate Current: 48 mA
Grid #2 Current: 5.5 mA
Transconductance11.3 mA/V
ResistanceCathode Resistor: 135 Ohms
Plate Resistor: 5.2 kOhms
Internal Plate Resistance: 40 kOhms
Output Power5.7 W @ 10% THD with fixed grid bias
6 W when Ig1 = 0.3 µA
AmplificationAmplification Factor: 19 µ
Physical Characteristics
Dimensions (H x Diam.)2.81 x 0.87" / 71.4 x 22.0 mm (excluding pins)
3.06 x 0.87" / 77.8 x 22.0 mm (including pins)
Weight0.5 oz / 14.2 g
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