TELEFUNKEN 6072A Balanced Triode Vacuum Tube
MRP - Rs. 21,300
TELEFUNKEN Green Diamond 6072A Balanced Triode for the AR-70, ELA M 270 and C24: premium low-noise tube tested for noise, microphonics and consistency. Available in India from Shivansh Electronics, Kolkata, West Bengal, India.
VISUAL GUIDE — See Every Photo, Spec & Setup Step (PDF)
The price shown is the MAXIMUM RETAIL PRICE (MRP), inclusive of all taxes. For the best price, exclusive offers and discounted rates, delivery timelines, or any other information, please DM us or call +91 89818 07755 / +91 91477 00677. We will gladly share an exclusive coupon code that you can apply at checkout. All payments are processed securely through Razorpay, our trusted payment gateway partner.
General
| Type | Dual‑triode vacuum tube |
| Tube | TELEFUNKEN 6072A "Green Diamond" |
| Version | Balanced Triode |
| Testing | Noise, microphonics and consistency |
| Character | Low noise, stable gain, smooth linear response |
| Fits | AR‑70, ELA M 270 and C24 |
6072A versions
| Triode A | TF51, AR‑51 |
| Triode B | ELA M 251E, C12 |
| Balanced Triode | AR‑70, ELA M 270 and C24 (stereo tube microphones) |
In the box
| Included | One 6072A vacuum tube, Balanced Triode |
| Not included | Microphone, power supply, cable and tools |
Ordering
| Part number | TUBE‑6072A‑TFK‑BAL |
Product overview
The TELEFUNKEN 6072A Balanced Triode Vacuum Tube is the TELEFUNKEN "Green Diamond" 6072A replacement tube with balanced triodes for stereo tube microphones, for the TELEFUNKEN AR-70, ELA M 270 and C24.
The TELEFUNKEN 6072A is a premium, low-noise vacuum tube engineered for demanding professional microphone and pro-audio applications. It is built to the highest standards and rigorously tested for noise, microphonics and consistency, and it provides stable gain and an exceptionally smooth, linear response. In microphone circuits, the 6072A excels at preserving transient detail, harmonic richness and depth, contributing to a sound that is clear, dimensional and musically balanced.
| TELEFUNKEN Green Diamond | 6072A |
| Triodes for stereo tube mics | Balanced |
| Tested for noise and microphonics | Low noise |
| Recommended warm‑up | 10 min |
Key features
- TELEFUNKEN "Green Diamond" 6072A premium low-noise vacuum tube
- Balanced Triode: balanced triodes for the TELEFUNKEN stereo tube microphones
- Rigorously tested for noise, microphonics and consistency
- Stable gain and an exceptionally smooth, linear response
- Preserves transient detail, harmonic richness and depth
- Made for the TELEFUNKEN AR-70, ELA M 270 and C24
Balanced Triode
TELEFUNKEN offers its 6072A in three tested versions so each microphone receives the tube it was designed around. The Balanced Triode version is the 6072A TELEFUNKEN lists for its stereo tube microphones, the AR-70, ELA M 270 and C24, where one dual-triode tube serves two capsule channels and both triodes need to be balanced.
The sound of the 6072A
TELEFUNKEN describes the sound the 6072A brings to a microphone as clear, dimensional and musically balanced. Its reliability and refined sonic performance make it a trusted choice for critical recording environments where accuracy and character are equally essential. Fitting the 6072A TELEFUNKEN specifies keeps each microphone sounding as it was voiced.
Choosing the right TELEFUNKEN tube
TELEFUNKEN lists a dedicated replacement tube for each of its tube microphones: the 5654W for the CU-29, TF29 and TF39 Copperhead models; the 5840W on a PCB mount for the TF47; the 5840W with flying leads for the AK-47 MkII and ELA M 260; the 6072A in Triode A, Triode B and Balanced versions for the TF51, AR-51, ELA M 251E, C12 and stereo tube microphones; and the VF14K for the U47 and U48. This listing is the 6072A Balanced Triode, for the AR-70, ELA M 270 and C24. Ordering the tube listed for your model keeps the microphone sounding exactly as TELEFUNKEN designed it.
When to replace the tube
Vacuum tubes are wear parts. Replace the tube when TELEFUNKEN or an authorised service centre advises it, during planned maintenance on a busy microphone, or keep this tube as a spare so a session or tour can continue. TELEFUNKEN has published tube change videos for several TELEFUNKEN tube microphones; for the stereo models, an authorised TELEFUNKEN service centre is the safest choice.
Fitting and care
- Switch off the power supply and disconnect the tube microphone cable before opening the microphone
- Let the fitted tube cool before handling it
- Have an authorised TELEFUNKEN service centre fit the tube, or follow TELEFUNKEN's official instructions for your microphone
- Handle the tube by its glass body, never by its pins, and keep it clean and dry
- Reconnect, switch on the power supply and let the system warm up for 10 minutes before use
What's included
| Included | One TELEFUNKEN 6072A vacuum tube, Balanced Triode |
| Not included | Microphone, power supply, cable and tools |
In the box
- TELEFUNKEN 6072A Balanced Triode Vacuum Tube
Choose the 6072A version listed for your microphone: Triode A for the TF51 and AR-51, Triode B for the ELA M 251E and C12, Balanced Triode for the AR-70, ELA M 270 and C24 stereo tube microphones.
TELEFUNKEN 6072A Balanced Triode Vacuum Tube: frequently asked questions
Which microphones is this version for?
TELEFUNKEN lists this version for the AR-70, ELA M 270 and C24.
What is the difference between the Triode A, Triode B and Balanced versions?
TELEFUNKEN offers the 6072A in three versions: tested for Triode A (TF51, AR-51), tested for Triode B (ELA M 251E, C12), and a Balanced Triode tube for stereo tube microphones (AR-70, ELA M 270 and C24). Order the version listed for your microphone.
Can I change the tube myself?
Follow TELEFUNKEN's official tube change video for your microphone where one is available, or have an authorised TELEFUNKEN service centre do the change.
How long should the microphone warm up after a change?
TELEFUNKEN recommends letting its tube microphone systems warm up for 10 minutes after the power supply is switched on.
Is a microphone included?
No. This product is the replacement tube only.
Where can I buy the TELEFUNKEN 6072A Balanced Triode Vacuum Tube in India?
The TELEFUNKEN 6072A Balanced Triode Vacuum Tube is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.
Workflow 1: AR-70 or ELA M 270 tube replacement
Changing the tube in an AR-70 or ELA M 270 stereo microphone.
Connections
| Connect | To |
|---|---|
| 6072A Balanced Triode | Tube socket inside the stereo tube microphone |
| stereo tube microphone | Its stereo tube microphone cable to its power supply |
| Power supply output | 3‑pin XLR to the mic preamp input |
Setup
- Switch off the power supply, disconnect the tube microphone cable and let the tube cool.
- Have the microphone opened by an authorised TELEFUNKEN service centre and the fitted tube removed.
- Fit the new 6072A and close the microphone.
- Reconnect, switch on and let the system warm up for 10 minutes, then check the signal.
Tip: If in doubt, have an authorised TELEFUNKEN service centre do the change.
Workflow 2: C24 tube replacement
Owners of the C24 stereo tube microphone.
Connections
| Connect | To |
|---|---|
| 6072A Balanced Triode | Tube socket inside the C24 |
| C24 | Its stereo tube microphone cable to its power supply |
| Power supply output | 3‑pin XLR to the preamp |
Setup
- Power the C24 down, disconnect it and let the tube cool.
- Have the fitted tube removed at an authorised TELEFUNKEN service centre.
- Fit the new 6072A and reassemble the microphone.
- Reconnect, warm up for 10 minutes and check the signal.
Workflow 3: Spare tube for sessions
A ready replacement so a recording day is never held up.
Connections
| Connect | To |
|---|---|
| Spare 6072A Balanced Triode | Microphone flight case or studio parts drawer |
| stereo tube microphone | Its tube microphone cable to its power supply |
| Power supply output | 3‑pin XLR to the preamp |
Setup
- Store the spare tube in its packing, away from dust and moisture.
- If the fitted tube needs changing, mute the channel and power down.
- Swap in the spare following the TELEFUNKEN procedure for the microphone.
- Warm up for 10 minutes and check the signal before resuming.
Workflow 4: Stereo channel balance check
Keeping both channels of a stereo tube microphone matched.
Connections
| Connect | To |
|---|---|
| 6072A Balanced Triode | Tube socket of the stereo microphone |
| Stereo tube microphone | Its stereo tube cable to its power supply |
| Power supply outputs | Two 3‑pin XLR to two preamp inputs |
Setup
- Note the gain settings that match the two channels before the change.
- Fit the tube following the TELEFUNKEN procedure, or at an authorised service centre.
- Warm the system up for 10 minutes.
- Compare both channels on the same source and match gain; contact TELEFUNKEN service if re-matching is needed.
Workflow 5: Touring spares kit
Engineers taking TELEFUNKEN tube microphones on the road.
Connections
| Connect | To |
|---|---|
| Spare 6072A Balanced Triode | Touring spares case |
| stereo tube microphone | Its tube cable to its power supply |
| Power supply output | 3‑pin XLR to the stage box or console |
Setup
- Pack and label a spare tube with each microphone.
- Keep it in its packing, protected from knocks.
- Change a tube only with the power supply off and the tube cool.
- Warm up for 10 minutes and line-check before the show.
Workflow 6: Studio and rental maintenance
Studios and rental companies with several AR-70, ELA M 270 and C24 microphones.
Connections
| Connect | To |
|---|---|
| 6072A Balanced Triode tubes | Parts stock, one spare per microphone |
| Microphone under test | Its tube cable to its power supply |
| Power supply output | 3‑pin XLR to a test preamp |
Setup
- Keep a service log per microphone.
- After each booking, warm up for 10 minutes and check noise and output.
- Replace the tube when the check shows it is due.
- Record which tube went into which microphone.
