Telefunken E88CC-TK/6922 Black Diamond Series Vacuum Tube

Telefunken E88CC-TK/6922 Black Diamond Series Vacuum Tube

Telefunken E88CC-TK/6922 Black Diamond Series Vacuum Tube

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Expected availability: 7-14 business days

Product Highlights

  • Dual Triode Vacuum Tube
  • Ideal for Mic Preamps & Phono Stages
  • Medium Gain & Low Noise
  • Clean Headroom, Transparent Tone
  • Precise Imaging, Versatile Dynamics
  • Gold-Plated Pins
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Configuration: Single Tube

Matched Pair

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Telefunken E88CC-TK overview

  • 1Description

The Telefunken E88CC-TK/6922 Black Diamond Series Vacuum Tube is ideal for use in microphone preamplifiers and phono stages in homes, studios, and live stage applications. For personal enjoyment or commercial recording, it grants accurate imaging and versatile, expressive dynamics. Offering medium gain and low noise, this dual triode tube delivers clean headroom and transparent tone critical to achieving sonically tight input stages. The E88CC-TK/6922 features gold-plated pins for enhanced signal integrity.

Newly manufactured and cryogenically treated to resurrect the transparent tone and harmonic impact of historical Siemens and Telefunken tubes
Great for microphone preamplifiers, phono stages, and sonically tight audio input sections
Also known as the 6922, the E88CC was originally targeted for test equipment and radar, but now serves audiophiles, musicians, and audio engineers
Designed to offer precise imaging, significant dynamics, and a full-bodied soundstage
Medium gain and low noise characteristics
Dual-triode like the 12AX7 tube, but with a different pin configuration (not a direct plug-in replacement)
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 re-measured before final packing
UPC: 899051002503
Table of Contents
  • 1Description

Telefunken E88CC-TK specs

Type R.F. dual triode
Base Noval
Number of Pins 9
Heater Requirements
Voltage 6.3 V
Current 365 mA
Direct Interelectrode Capacitances
Capacitance Grid to Cathode and Heater: 3.1 pF
Plate to Cathode and Heater: 0.18 pF
Grid to Plate: 1.4 pF
Maximum Ratings
Voltage Plate Voltage: 550 V in cold conditions
Plate Voltage: 400 V at 0 mA plate current
Plate Voltage: 220 V
Plate Voltage: 250 V at <0.8 W plate dissipation
Grid Voltage: -100 V
Cathode Positive to Heater Negative Voltage: 120 V
Cathode Negative to Heater Positive Voltage: 60 V
Current Cathode Current: 20 mA
Dissipation Plate Dissipation: 1.5 W
Grid Dissipation: 30 mW
Resistance Cathode to Heater Resistance: 20 kOhms
Typical Operation and Characteristics
Voltage Plate Voltage: 90 V
Grid Voltage: -1.3 V
Current Plate Current: 15 mA
Transconductance 12.5 mA/V
Resistance Internal Plate Resistance: 2.6 kOhms
Amplification Amplification Factor: 33
Physical Characteristics
Dimensions (H x Diam.) 1.9 x 0.9" / 49.2 x 22.0 mm (excluding pins)
2.2 x 0.9" / 55.6 x 22.0 mm (including pins)
Weight 0.3 oz / 8.5 g
Packaging Info
Package Weight 0.04 lb
Box Dimensions (LxWxH) 3.1 x 1.0 x 1.0"

Telefunken E88CC-TK reviews

E88CC-TK/6922 Black Diamond Series Vacuum Tube is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Vintage Wine For The Ears! If you have an audio system that is capable of displaying the difference, these are much above the $19 version of this tube. I have a Magnum Dynalab MD809t internet tuner that features a 4-tube push-pull output which came equipped with the lesser-costing version of this tube; after replacing them with the Black Diamond series I hear a distinct difference in audio quality. It's nice to get back to the warmth and depth of sound that distinguishes tubes from transistors. With these Black Diamonds there is no tube hiss or hint of distortion -- it's vintage wine for the ears!
Date published: 2017-03-08
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