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Glass vacuum tube with black base and metallic top, octal pin configuration

Telefunken

Telefunken 6L6GC-TK Black Diamond Power Amp Vacuum Tube

SKU CH-7T20-R8CY6

A power amplifier vacuum tube delivering 6.5 watts single-ended or 17.5 watts push-pull with warm, low-noise tone

  • Warm, rich audio with exceptional clarity and depth
  • Robust construction and premium materials for extended tube life
  • Optimized design minimizes unwanted noise and interference
  • 5W single or 17.5W push-pull maximum signal power output
  • First power tetrode developed by RCA in 1936

Telefunken 6L6GC-TK Vacuum Tube

The Telefunken 6L6GC-TK is a new production power amplifier vacuum tube from the Black Diamond Series. It is built for guitar amplifiers and hi-fi equipment requiring an octal base power tetrode. Musicians and audio technicians seeking warm, rich tonal character with extended service life will find it suitable.

Suited for American-voiced amps needing clean

Players who want slower break-up, tight lows, transparent mids and shimmering highs will benefit from this design. It is not for designs requiring EL34 or EL84 pinouts, nor for circuits that demand earlier distortion onset or higher single-tube output than the rated figures.

6.5 W single / 17.5 W push-pull maximum signal power

This output rating determines whether the tube matches your amplifier's design targets. The 1936 RCA heritage and 1940s Fender legacy inform its sonic signature, but the wattage limits define the compatible circuit topologies.

How it compares

Measured against everything we stock in Pro Audio Equipment, at today’s prices. Recalculated every night.

Price $71.99
Pricier than about 56% of the 613 comparable items (median $56.99).

Specifications

No published specifications for this item yet.

Questions about this item

Which amplifier sockets and bias arrangement are required for the 6L6GC-TK to operate?

The tube uses an octal base and fits any amplifier designed for 6L6GC types, whether wired for single-ended 6.5 W or push-pull 17.5 W operation.

Can the 6L6GC-TK replace older 6L6 tubes in a vintage Fender-style amp from the 1940s onward?

Yes, it is a direct substitute for original 6L6 types used in Fender amplifiers since the 1940s and delivers the same American clean headroom with slower break-up.

How can I confirm the 6L6GC-TK is performing correctly after installation?

Listen for tight lows, transparent mids and shimmering highs with low noise; the amp should show clean headroom and slow break-up characteristic of the 6L6GC design.

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