Telefunken 6550-TK Black Diamond Series Vacuum Tube

Telefunken 6550-TK Black Diamond Series Vacuum Tube

Telefunken 6550-TK Black Diamond Series Vacuum Tube

B&H # TE6550TK MFR # 6550-TK
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Expected availability: 7-14 business days

Product Highlights

  • Power Tetrode Output Tube
  • Ideal for Guitar & Bass Amplifiers
  • Great for Leslie Cabinets
  • Delivers up to 35W of Output Power
  • Higher Gain Than a 6L6
  • Extended Longevity
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Configuration: Single Tube

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Single Tube

This item is noncancelable and nonreturnable.

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Telefunken 6550-TK overview

  • 1Description

The Telefunken 6550-TK Black Diamond Series Vacuum Tube is ideal for use in Leslie cabinets and guitar, bass, and keyboard amplifiers in homes, studios, and live stage applications. For personal enjoyment, live performance, or commercial recording, it grants the essence of a 6L6 with increased gain and enhanced stability. In a slightly larger footprint than a 6L6, this beam pentode (or power tetrode) tube delivers up to 35W of output power and extended longevity.

Ideal for use in Leslie cabinets as well as guitar and bass amplifiers
Design based on the 6L6, but with more gain and enhanced stability
Inspired by the classic 6550, which was developed by Tung-Sol in 1955
Delivers up to 35W at the tube output
Extended longevity means fewer tube changes over the years
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
UPC: 899051002541
Table of Contents
  • 1Description

Telefunken 6550-TK specs

Type A.F. beam pentode
Base Octal
Number of Pins 7
Heater Requirements
Voltage 6.3 V
Current 1.6 A
Direct Interelectrode Capacitances
Capacitance Grid #1 to All Except Plate: 14 pF
Plate to All Except Grid #1: 12 pF
Plate to Grid #1: 0.85 pF
Maximum Ratings
Voltage Plate Voltage: 600 V
Grid #2 Voltage: 400 V
Grid #1 Voltage (negative bias value): -300 V
Grid #1 Voltage (positive bias value): 0 V
Current Cathode Current: 175 mA
Dissipation Plate Dissipation: 35 W
Grid #2 Dissipation: 6 W
Typical Operation and Characteristics
Voltage Plate Voltage: 250 V
Grid #2 Voltage: 250 V
Grid #1 Voltage: -14 V
Current Plate Current: 140 mA
Grid #2 Current: 12 mA
Transconductance 11.8 mA/V
Resistance Internal Plate Resistance: 16 kOhms
Physical Characteristics
Dimensions (H x Diam.) 4.33 x 1.69" / 110 x 43 mm (excluding pins)
4.92 x 1.69" / 125 x 43 mm (including pins)
Weight 3 oz / 85 g
Packaging Info
Package Weight 0.2 lb
Box Dimensions (LxWxH) 5.5 x 1.9 x 1.9"

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