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Telefunken E88CC-TK/6922 Black Diamond Series Vacuum Tube with Balanced Triodes

BH #TEE88CTK6922 • MFR #E88CC-TK (6922) W/ BALANCED TRIODES
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Telefunken E88CC-TK/6922 Black Diamond Series Vacuum Tube with Balanced Triodes
Key Features
  • Balanced Dual Triode Vacuum Tube
  • Ideal for Mic Preamps & Phono Stages
  • Medium Gain & Low Noise
  • Clean Headroom, Transparent Tone
The Telefunken E88CC-TK/6922 Black Diamond Series Vacuum Tube is ideal for use in microphone preamplifiers and phono stages in home, studio, 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. This E88CC-TK/6922 tube features balanced triodes to help ensure consistent, low-noise performance and gold-plated pins for enhanced signal integrity.
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Telefunken E88CC-TK (6922) W/ BALANCED TRIODE... Overview

The Telefunken E88CC-TK/6922 Black Diamond Series Vacuum Tube is ideal for use in microphone preamplifiers and phono stages in home, studio, 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. This E88CC-TK/6922 tube features balanced triodes to help ensure consistent, low-noise performance and 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: 810047032953

Telefunken E88CC-TK (6922) W/ BALANCED TRIODE... Specs

Mechanical
Type
R.F. Dual Balanced 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 Kilohms
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 Kilohms
Amplification
Amplification Factor: 33 µ
Physical Characteristics
Dimensions (H x Diam.)
1.9 x 0.9" / 49.2 x 22 mm (Excluding Pins)
2.2 x 0.9" / 55.6 x 22 mm (Including Pins)
Weight
0.3 oz / 8.5 g
Packaging Info
Package Weight
0.035 lb
Box Dimensions (LxWxH)
3.45 x 1.35 x 1.1"

Telefunken E88CC-TK (6922) W/ BALANCED TRIODE... Reviews

Fantastic sounding tube

By Timothy
Rated 5 out of 5
Date: 2024-04-20

I burned it in for 50 hours before using it. Sounds fantastic in my Rode NTK mic

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What's the difference between "Telefunken ...

What's the difference between "Telefunken E88CC-TK (6922) with Balanced Triode" and "Telefunken E88CC-TK/6922 Black Diamond Series Vacuum Tube" ?
Asked by: Gustavo
The plate current draw of the two tubes within the glass covering of the version with balanced triodes is tested to be the same. Having the tubes pushing and pulling at the same rate can produce better sound, theoretically.
Answered by: Steven M
Date published: 2024-12-03
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