TELEFUNKEN 6V6-TK Vacuum Tube Matched Pair

Product overview

The TELEFUNKEN 6V6-TK Vacuum Tube Matched Pair is the Black Diamond Series 6V6, a newly manufactured rendition of the legendary beam-power tetrode, supplied here as a matched pair of 6V6-TK tubes.

Originally released in 1937, the 6V6 is a beam-power tetrode ideal for hi-fi audio equipment and musical instrument amplifiers. It has been used in popular guitar amplifiers for decades, and TELEFUNKEN offers the Black Diamond Series 6V6-TK as a perfect replacement for keeping the same performance and tone as the originals.

Beam‑power tetrode	6V6
First released	1937
Tubes in this product	2
Treated, tested and burned‑in	Cryogenic

Key features

• 6V6 beam-power tetrode
• Robust tone from a newly manufactured rendition of the legendary 6V6
• Keeps the performance and tone of the originals
• For hi-fi audio equipment and musical instrument amplifiers
• Durable construction and rigorous quality control
• Black Diamond Series: rigorously tested, cryogenically treated and extensively burned-in

The 6V6-TK sound

Preceded by the 6L6, the 6V6 is a lower-powered tube that gained much wider popularity and use, and it has powered classic American combo amplifiers for decades. The Black Diamond Series 6V6-TK offers a robust tone, and its rigorous quality control and durable construction yield a dependable tube ready for the most demanding applications.

Where it works

Fit the 6V6-TK wherever an amplifier is specified for the 6V6: guitar and instrument amplifiers as well as hi-fi audio equipment.

Applications

• Small combo amplifier: practice and studio combos built around the 6V6
• Two-tube combo amplifier: combos with a pair of 6V6 power tubes
• Hi-fi audio equipment: home audio amplifiers specified for the 6V6
• Studio backline: studios keeping their 6V6 combos session-ready
• Live sound and touring spares: backline techs carrying replacement power tubes
• Rental inventory: rental stores retubing amplifiers between bookings

Black Diamond Series

TELEFUNKEN Elektroakustik Black Diamond Series vacuum tubes are new production tubes, manufactured in partnership with a specialist vacuum tube factory in Slovakia and designed to be harmonically rich and tonally balanced. Each tube is rigorously tested, cryogenically treated and extensively burned-in before it carries the Black Diamond name, so the 6V6-TK arrives ready for the most demanding applications.

This configuration: Matched Pair

This product is a Matched Pair: two 6V6-TK tubes matched by TELEFUNKEN and supplied together as one set. Keep a matched set together in the two positions of the same circuit.

Fitting and care

Always switch the equipment off, unplug it from the mains and let the tubes cool completely before removing or fitting a tube. Fit the 6V6-TK only in a socket specified for the 6V6, keep each tube in the position of the one it replaces, and press it straight and fully into the socket. Power sections hold high voltages, so leave any work inside the chassis, including any bias adjustment the amplifier requires, to a qualified technician. After fitting, let the equipment warm up and listen at low volume first. Store spare tubes in their packaging, protected from knocks and moisture.

What's included

Included	Two TELEFUNKEN 6V6‑TK vacuum tubes (matched pair)
Not included	Amplifier or equipment, sockets and installation, bias adjustment

In the box

• Two TELEFUNKEN 6V6-TK vacuum tubes (matched pair)

Vacuum tubes are glass components: handle them by the glass envelope, avoid knocks and keep them in their packaging until fitting.

TELEFUNKEN 6V6-TK Vacuum Tube Matched Pair: frequently asked questions

What is the 6V6-TK used for?

TELEFUNKEN describes the 6V6 as ideal for hi-fi audio equipment and musical instrument amplifiers, and it has been used in popular guitar amplifiers for decades.

Will it keep my amplifier's original tone?

TELEFUNKEN offers the 6V6-TK as a perfect replacement for keeping the same performance and tone as the originals.

What does Black Diamond Series mean?

It is TELEFUNKEN Elektroakustik's range of new production vacuum tubes, designed to be harmonically rich and tonally balanced; each tube is rigorously tested, cryogenically treated and extensively burned-in.

Do I need a technician to fit it?

Fitting is a straight swap in the socket, but power sections and rectifier circuits hold high voltages. Where an amplifier has adjustable bias, have a qualified technician check it after fitting new power tubes, following the amplifier maker's instructions.

How many tubes are included?

Two tubes, matched by TELEFUNKEN and supplied as one set (Matched Pair).

Where can I buy the TELEFUNKEN 6V6-TK Vacuum Tube Matched Pair in India?

The TELEFUNKEN 6V6-TK Vacuum Tube Matched Pair is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.

Workflow 1: Small combo amplifier

Practice and studio combos built around the 6V6.

Connections

Connect	To
6V6‑TK	6V6 power tube socket(s) of the combo

Setup

1. Switch the amplifier off, unplug it from the mains and let the tubes cool completely; power sections hold high voltages, so leave work inside the chassis to a qualified technician.
2. Note each position, then gently rock the old 6V6 tubes straight out of their sockets.
3. Fit the 6V6-TK tubes with the pins or key aligned, pressing each fully home, and refit any retainers.
4. Power up and let the amplifier warm up; have the bias checked by a qualified technician where the amplifier requires it, then check the sound at low volume.

Tip: Keep the matched pair together in the same circuit.

Workflow 2: Two-tube combo amplifier

Combos with a pair of 6V6 power tubes.

Connections

Connect	To
6V6‑TK	The two 6V6 power tube sockets

Setup

1. Switch the amplifier off, unplug it from the mains and let the tubes cool completely; power sections hold high voltages, so leave work inside the chassis to a qualified technician.
2. Note each position, then gently rock the old 6V6 tubes straight out of their sockets.
3. Fit the 6V6-TK tubes with the pins or key aligned, pressing each fully home, and refit any retainers.
4. Power up and let the amplifier warm up; have the bias checked by a qualified technician where the amplifier requires it, then check the sound at low volume.

Workflow 3: Hi-fi audio equipment

Home audio amplifiers specified for the 6V6.

Connections

Connect	To
6V6‑TK	6V6 output sockets of the hi‑fi amplifier

Setup

1. Switch the amplifier off, unplug it from the mains and let the tubes cool completely; power sections hold high voltages, so leave work inside the chassis to a qualified technician.
2. Note each position, then gently rock the old 6V6 tubes straight out of their sockets.
3. Fit the 6V6-TK tubes with the pins or key aligned, pressing each fully home, and refit any retainers.
4. Power up and let the amplifier warm up; have the bias checked by a qualified technician where the amplifier requires it, then check the sound at low volume.

Workflow 4: Studio backline

Studios keeping their 6V6 combos session-ready.

Connections

Connect	To
6V6‑TK	6V6 sockets of the studio combo

Setup

1. Switch the amplifier off, unplug it from the mains and let the tubes cool completely; power sections hold high voltages, so leave work inside the chassis to a qualified technician.
2. Note each position, then gently rock the old 6V6 tubes straight out of their sockets.
3. Fit the 6V6-TK tubes with the pins or key aligned, pressing each fully home, and refit any retainers.
4. Power up and let the amplifier warm up; have the bias checked by a qualified technician where the amplifier requires it, then check the sound at low volume.

Workflow 5: Live sound and touring spares

Backline techs carrying replacement power tubes.

Connections

Connect	To
6V6‑TK	Spares case, then the 6V6 sockets of the touring amplifier

Setup

1. Switch the amplifier off, unplug it from the mains and let the tubes cool completely; power sections hold high voltages, so leave work inside the chassis to a qualified technician.
2. Note each position, then gently rock the old 6V6 tubes straight out of their sockets.
3. Fit the 6V6-TK tubes with the pins or key aligned, pressing each fully home, and refit any retainers.
4. Power up and let the amplifier warm up; have the bias checked by a qualified technician where the amplifier requires it, then check the sound at low volume.

Workflow 6: Rental inventory

Rental stores retubing amplifiers between bookings.

Connections

Connect	To
6V6‑TK	6V6 sockets of the rental amplifier

Setup

1. Switch the amplifier off, unplug it from the mains and let the tubes cool completely; power sections hold high voltages, so leave work inside the chassis to a qualified technician.
2. Note each position, then gently rock the old 6V6 tubes straight out of their sockets.
3. Fit the 6V6-TK tubes with the pins or key aligned, pressing each fully home, and refit any retainers.
4. Power up and let the amplifier warm up; have the bias checked by a qualified technician where the amplifier requires it, then check the sound at low volume.