Transparent Music Tesla Coil / Half-Bridge DRSSTC
WARDENCLYFFE® TC20 Tesla Coil
A compact transparent Half-Bridge DRSSTC delivering adjustable arcs up to 30 cm (11.8 inches), with 150W rated power and SD Card, Bluetooth, Lightning, and Single Shot modes for classroom demonstrations, exhibitions, and music-synchronized science displays.
TC20 Core Features
Measured 30 cm Arc Output
TC20 produces adjustable arcs up to 30 cm (11.8 inches). Compared with the earlier 20 cm generation, the current design increases the maximum arc length by 50%, creating a clearer and more dramatic high-voltage display for classrooms and exhibitions.
Wireless Control Without Fiber Cables
TC20 replaces the earlier wired optical-fiber control system with a dedicated wireless controller, giving the operator greater freedom to select operating modes and adjust discharge behavior from outside the demonstration area.
100+ Built-In Tracks — No Phone Required
The internal SD card includes 100+ built-in square-wave music tracks, allowing music-synchronized lightning demonstrations without connecting a phone or computer. Bluetooth Mode can also play compatible prepared square-wave audio from an external device.
Transparent DRSSTC Refined Through Real-World Use
The transparent acrylic housing reveals the actual Half-Bridge DRSSTC system inside, while the integrated aluminum alloy heat-sink base supports repeated demonstrations. TC20 has been refined through multiple product generations and long-term user feedback, and it includes a protective transport case for storage and transport.
Technical Specifications
| Product name | WARDENCLYFFE® TC20 Tesla Coil |
| Model | TC20 |
| Product type | Transparent Music Tesla Coil |
| Input voltage | 100–240VAC / 50–60Hz |
| Rated power | 150W |
| Circuit architecture | Half-Bridge DRSSTC |
| Resonant frequency | Approx. 450 kHz |
| Output voltage | Up to 300 kV |
| Maximum spark length | 30 cm (11.8 inches) |
| Dimensions | 10*10*20 cm (3.9*3.9*7.9 inches) |
| Shipping weight | 1.6 kg (3.5 lb) |
| Safety perimeter | At least 76 cm (30 inches) |
| Recommended user age | 16+; responsible adult supervision required |
| Control method | Dedicated wireless controller with FCC ID |
| Operating modes | SD Card Mode / Bluetooth Mode / Lightning Mode / Single Shot Mode |
| Built-in music library | 100+ built-in square-wave music tracks |
| Main unit housing | Transparent acrylic |
| Base / heat dissipation | Integrated aluminum alloy heat-sink base |
| Transport protection | Protective transport case |
Mode Reference
- SD Card Mode: Play built-in square-wave music tracks from the internal SD card.
- Bluetooth Mode: Connect a phone or computer to play compatible prepared square-wave audio.
- Lightning Mode: Use the controls to adjust lightning length and discharge rhythm.
- Single Shot Mode: Press the start/pause button to trigger a single lightning discharge.
FAQ
What kind of space is TC20 designed for?
TC20 is designed for classroom demonstrations, science exhibitions, supervised institutional STEM presentations, and compact music displays. Use it only in a controlled area with sufficient clearance and appropriate high-voltage safety procedures.
Can TC20 play regular music?
No. TC20 uses square-wave audio for arc modulation. Use the 100+ built-in square-wave music tracks or compatible prepared square-wave audio.
How far should people and electronics stay away?
Maintain a controlled safety perimeter of at least 76 cm (30 inches). Phones, laptops, cameras, wireless devices, and other sensitive electronics should stay outside the controlled safety area.
Who should operate TC20?
TC20 is recommended for users aged 16 and above and should be operated under responsible adult supervision. It is a real high-voltage demonstration device and must be used according to the user manual and site safety conditions.
How to Choose: TC20 vs TC50 vs TC150
Choose by demonstration scale first: TC20 fits classroom-scale presentations, TC50 fits larger music-display setups, and TC150 is built for controlled professional demonstrations with a much larger arc class and safety perimeter.
| Model |
 TC20
View Model |
 TC50
View Model |
 TC150
View Model |
|---|---|---|---|
| Best fit | Classroom-scale physics and STEM demonstrations | Large music display and public science presentation | Professional large-scale high-voltage demonstration |
| Maximum spark length | 30 cm (11.8 inches) | 50 cm (19.7 inches) | 1.5 m (59.1 inches) |
| Rated power | 150W | 500W | 3500W |
| Circuit architecture | Half-Bridge DRSSTC | Full-Bridge DRSSTC | Full-Bridge DRSSTC |
| Input voltage | 100–240VAC | 100–240VAC | 220V AC only |
| Control system | 4 modes + wireless controller | 4 modes + wireless controller | 4 modes + wireless controller |
| Main unit size | 10*10*20 cm (3.9*3.9*7.9 inches) | 21*21*39 cm (8.3*8.3*15.4 inches) | 42*42*120 cm (16.5*16.5*47.2 inches) |
| Weight | 1.6 kg (3.5 lb) | 8.0 kg (17.6 lb) | 45 kg (99.2 lb) |
| Recommended safety distance | 76 cm (30 inches) | 100 cm (40 inches) | 300 cm (118.1 inches) |
| Model |
TC20
View Model |
TC50
View Model |
TC150
View Model |
|---|---|---|---|
| Best fit | Classroom demo | Large music display | Professional demo |
| Arc length | 30 cm (11.8 inches) | 50 cm (19.7 inches) | 1.5 m (59.1 inches) |
| Rated power | 150W | 500W | 3500W |
| Input voltage | 100–240VAC | 100–240VAC | 220V AC only |
| Control system | 4 modes + wireless controller | 4 modes + wireless controller | 4 modes + wireless controller |
| Size | 10*10*20 cm (3.9*3.9*7.9 inches) | 21*21*39 cm (8.3*8.3*15.4 inches) | 42*42*120 cm (16.5*16.5*47.2 inches) |
| Weight | 1.6 kg (3.5 lb) | 8.0 kg (17.6 lb) | 45 kg (99.2 lb) |
| Safety | 76 cm (30 inches) | 100 cm (40 inches) | 300 cm (118.1 inches) |
When Will It Arrive?
US Warehouse Shipping
When local stock is available, estimated delivery is 5–10 business days.
Global Express Shipping
Global orders ship by express air freight. Estimated delivery: 15–30 business days for major destinations including the UK, EU, Canada, and Australia.
Custom or Special Orders
Custom builds, special configurations, or temporary out-of-stock items may require additional lead time. Please contact us before purchase to confirm availability and estimated delivery schedule.
BEFORE YOU BUY
TESLA COIL GUIDE
Compare this model with the full range
Check arc length, dimensions, weight, power, music control, sound, and safety distance before you choose.