125B · 3 knobs
TellurionDynamic Drive
Based on the Fulltone Full-Drive 1
- Category
- Overdrive
- Controls
- Drive · Tone · Volume
- Difficulty
- Easy
- Price
- $12.50in stock
From the vendor
An adaptation of one of the original boutique pedals dating back to 1995, based on the classic Tube Screamer but with several hot-rodded additions.
Fulltone and OCD are registered trademarks of Fulltone Musical Products LLC. Any use of these trademarks is for comparative purposes only. Aion FX has no affiliation with Fulltone Musical Products and this DIY project is not endorsed by them.
Project overview
The Tellurion Dynamic Drive is an adaptation of the Fulltone Full-Drive 1, often abbreviated as the FD1. It was released in 2018 and traced by Aion FX in 2026.[1]
The original Full-Drive was one of the first hand-made boutique pedals going all the way back to 1995. It was based on the classic Tube Screamer circuit, but with modified clipping diodes and a footswitch that engages a fixed gain boost.
The Full-Drive 1 is not actually a reissue of the original Full-Drive, but instead a new product that is essentially a single-channel FD2 with some tweaks to make it sound more like the late ‘90s units. It leaves off the Boost footswitch, but incorporates the 3-way Mode switch to get two extra settings in addition to the vintage Tube Screamer circuit.
The Tellurion project is an adaptation of the traced Full-Drive 1 with a few additions. The Mode switch is the same as the original, but we’ve added a Clipping switch to select between three different sets of clipping diodes. See build notes in the PDF documentation for options.
Note that while the initial product announcement makes reference to “Enhanced Bypass”, the JFET bypass system first used in the OCD V2, the unit we traced was standard true bypass via a 3PDT switch. The user manual only mentions to true bypass, so it seems there was a last-minute change between the announcement and when it went into production.
Notes & references • No tracing journal for this one since it’s almost identical to the FD2. The schematic in the build doc has an added clipping switch not in the original, but everything else is the same as our trace except for standardizing the power filtering with our other projects. ↩
Schematic
The schematic is in the vendor's build document, page 7. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 60 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 21 | ||||
| R1 | 1k | 1k | Metal film resistor, 1/4W | |
| R2 | 510k | 510k | Metal film resistor, 1/4W | |
| R3 | 10k | 10k | Metal film resistor, 1/4W | |
| R4 | 10k | 10k | Metal film resistor, 1/4W | |
| R5 | 18k | 18k | Metal film resistor, 1/4W | |
| R6 | 4k7 | 4.7k | Metal film resistor, 1/4W | |
| R7 | 1k | 1k | Metal film resistor, 1/4W | |
| R8 | 10k | 10k | Metal film resistor, 1/4W | |
| R9 | 220R | 220 | Metal film resistor, 1/4W | |
| R10 | 1k | 1k | Metal film resistor, 1/4W | |
| R11 | 150k | 150k | Metal film resistor, 1/4W | |
| R12 | 1k | 1k | Metal film resistor, 1/4W | |
| R13 | 510k | 510k | Metal film resistor, 1/4W | |
| R14 | 10k | 10k | Metal film resistor, 1/4W | |
| R15 | 100R | 100 | Metal film resistor, 1/4W | |
| R16 | 10k | 10k | Metal film resistor, 1/4W | |
| R17 | 10k | 10k | Metal film resistor, 1/4W | |
| R18 | 10k | 10k | Metal film resistor, 1/4W | |
| R19 | 47R | 47 | Metal film resistor, 1/4W | Power supply filter resistor. |
| RPD | 1M | 1M | Metal film resistor, 1/4W | Input pull-down resistor. |
| LEDR | 10k | 10k | Metal film resistor, 1/4W | LED current-limiting resistor. Adjust value to change LED brightness. |
| Capacitors 14 | ||||
| C2 | 22n | 22n | Film capacitor, 7.2 x 2.5mm | |
| C3 | 1uF | 1u | Film capacitor, 7.2 x 5mm | |
| C4 | 47pF | 47p | MLCC capacitor, NP0/C0G | |
| C5 | 68n | 68n | Film capacitor, 7.2 x 2.5mm | |
| C6 | 220n | 220n | Film capacitor, 7.2 x 3mm | |
| C7 | 220n | 220n | Film capacitor, 7.2 x 3mm | |
| C8 | 10n | 10n | Film capacitor, 7.2 x 2.5mm | |
| C9 | 1uF | 1u | Film capacitor, 7.2 x 5mm | |
| C10 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C11 | 1uF | 1u | Film capacitor, 7.2 x 5mm | |
| C12 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C13 | 47uF | 47u | Electrolytic capacitor, 5mm | Reference voltage filter resistor. |
| C14 | 100uF | 100u | Electrolytic capacitor, 6.3mm | Power supply filter resistor. |
| C15 | 100n | 100n | MLCC capacitor, X7R | Power supply filter resistor. |
| Diodes 7 | ||||
| D1 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| D2 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| D3 | 1N4007 | 1N4007 | Rectifier diode, DO-41 | |
| D4 | 1N34A | 1N34A | Germanium diode, DO-7 | Any germanium diode should work the same in this circuit, so use |
| D5 | 1N34A | 1N34A | Germanium diode, DO-7 | whatever you can find. See build notes for precautions about polarity. |
| D7 | 3mm red | 3MM RED | LED, 3mm, red diffused | |
| D8 | 3mm red | 3MM RED | LED, 3mm, red diffused | |
| Transistors 4 | ||||
| Q1 | 2N5088 | 2N5088 | BJT transistor, NPN, TO-92 | Can also use BC549C (rotate 180 degrees from silkscreen). |
| Q2 | 2N7000 | 2N7000 | MOSFET, N-channel, TO-92 | Can also use BS170 (rotate 180 degrees from silkscreen). |
| Q3 | 2N7000 | 2N7000 | MOSFET, N-channel, TO-92 | Can also use BS170 (rotate 180 degrees from silkscreen). |
| Q4 | 2N5088 | 2N5088 | BJT transistor, NPN, TO-92 | Can also use BC549C (rotate 180 degrees from silkscreen). |
| ICs 1 | ||||
| IC1 | JRC4558D | JRC4558D | Operational amplifier, DIP8 | |
| Potentiometers 3 | ||||
| DRIVE | 500kA | A500k | 16mm right-angle PCB mount pot | |
| TONE | 20kW | W20k | 16mm right-angle PCB mount pot | Original uses 25kW, which is not available in small quantities from DIY suppliers. 20kW will perform the same. |
| VOL. | 100kA | A100k | 16mm right-angle PCB mount pot | |
| Switches 3 | ||||
| CLIP | SPDT cntr off | SPDT CNTR OFF | Toggle switch, SPDT on-off-on | |
| MODE | DPDT on-on-on To | DPDT ON-ON-ON TO | ggle switch, DPDT on-on-on | Must be Type 2 configuration See build notes for a diagram. |
| FSW | 3PDT | 3PDT | Stomp switch, 3PDT | |
| LEDs 1 | ||||
| LED | 5mm | 5MM | LED, 5mm, red diffused | |
| Jacks & sockets 4 | ||||
| IC1-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IN | 1/4" stereo | 1/4" STEREO | 1/4" phone jack, closed frame | Switchcraft 112BX or equivalent. |
| OUT | 1/4" mono | 1/4" MONO | 1/4" phone jack, closed frame | Switchcraft 111X or equivalent. |
| DC | 2.1mm | 2.1MM | DC jack, 2.1mm panel mount | Mouser 163-4302-E or equivalent. |
| Hardware 2 | ||||
| BATT. | 9V | 9V | 9V battery snap | Soft vinyl type. The hard-shell type will not fit. |
| ENC | 125B | 125B | Enclosure, die-cast aluminum | Can also use a Hammond 1590N1. |