Project overview
The Lemon Rockververb is an exclusive original design by PCB Mania, inspired by Orange Rockerverb, replacing the tubes for JFET to make it pedal-friendly.
Introduction
The Orange Rockerverb was initially developed a decade ago and got released by 2004 as the first high gain tube head by the British company in response to the need for extra gain from the modern players. But that is not what gives this marvelous preamp exclusively valuable for metal players; what makes this bad boy truly special is its versatile workhorse that will take you anywhere from classic British crunch to the very heaviest in modern metal.
Remember, this project requires sourcing some good quality JFET from trusted sources for proper functioning. We always recommend using SMD JFET as their reliability is far superior to the discontinued through-hole counterpart. Also, bear in mind this project requires bias the transistors correctly with the respective trim pots.
To do this correctly, plug the pedal into your 9v power supply/battery, grab your multimeter and plug the black terminal into any ground of the circuit. Simultaneously, with the read touch, the Drain legs of your transistors, if it’s done correctly, should appear how much voltage is receiving that leg.
Now turn the trimpot with a screwdriver till you can read 4.5v- or half of your power supply; in case you are using 18v- on the screen of your multimeter. Repeat this process with all transistors and their respective trimpots till all of them are measuring 4.5v, then proceed to do fine-tuning by ear on what you hear are the best settings of each transistor.
Don’t forget to share your favorite bias settings and pictures of your build on our Facebook group!
Controls
- Preamp
- Gain
- Volume
- Bass
- Treble
- Mids
For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.
Alexander (verified owner) –
This thing really captures Orange Rockerverb feel. However, if you look for the brutal high gain with that Rockerverb flavour, you won’t get that much gain. Most of Orange Amplification “amp in a box” style pedals share this pequliarity: either you’d retain the character and trademark tone of the Orange amps, or you’ll get more of a fuzz than a “Orange-style” high gain. This pedal won’t give you same amount of high gain, but this pedal captures the sound structure of the Rockerverb, and touch feel that reminded me Orange Crush amp. The drawbacks of the Lemon Rockerverb are that it doesn’t like loud boosts in front of it, as well as the treble control is somewhat strange – it acts like a rejector eq filter: when you crank the treble control, the middle and bass frequencies getting attenuated. Other than that it is great Rockerverb inspired medium gain pedal that sounds fine both plugged into amp or straight into cabsim.