Amp Selector FX Router
BYOC Amp Selector FX Router. With this pedal, it's possible to route your instrument to more than one amp, or effects loop. It's even possible to output your instrument to more than one amp simultaneously. Ground lift transformers are available in the pedal as well to minimize ground loop hum than can occur when an instrument is plugged into more than one amp simultaneously.
Thermionic Studios has purchased this kit to build this pedal. We are in the process of building the pedal and will have more to report upon completion.
Controls
- Switch 1 - "Transformer 1 Isolation Switch":
- Switch 2 - "Transformer 2 Isolation Switch":
- Switch 3 - "Phase Inversion for Output B":
- Footswitch 1 - "Both/One":
- Footswitch 2 - "A/B":
General Information
http://byocelectronics.com/ampselectorinstructions.pdf
Operation
- The A/B footswitch selects/toggles between Output A and Output B - The BOTH footswitch turns on both Output A and Output B simultaneously.
Use
If you plug an instrument cable into:
- Input A without anything plugged into Input B then the pedal will send signal to both Output A and Output B.
- Input A while also having a cable plugged into Input B, then the pedal will only send signal to Output A.
- Input B then the pedal will only send signal out to Output B.
Transformer isolation switches:
- Switch A: This switch toggles the transformer for Output A on and off.
- Switch flipped to the left is ON; flipped to the right is OFF.
- Switch B: operates exactly the same as Switch A, but for Output B.
Phase Inversion
Our review of the schematic draws us to conclude that the BYOC Amp Selector and Stereo FX Router does not invert phase.
| Electronic Part | Action | Phase State |
|---|---|---|
| IC1a | Does not Invert | Original |
| IC1b | Does not Invert | Original |
| IC2a | Does not Invert | Original |
| IC3a | Does not Invert | Original |
| IC3b | Does not Invert | Original |
This will have to be born out by testing and observation.
However, many on the BYOC board forums have looked at the Amp Selector/FX Router and suggested an interesting option: If it wouldn't be helpful to use the remaining half of IC2, and some of the remaining empty pads on the PCB in order to set up a switch that will toggle the phase inversion of the audio signal through output B to make it either in-phase, or out-of-phase.
Here are a few threads on the byoc boards discussing the phase inversion switch:
http://www.byocelectronics.com/board/viewtopic.php?f=52&t=44330
http://www.byocelectronics.com/board/viewtopic.php?f=12&t=32756&hilit=amp+selector+phase
As this appears to be possible, we will be implementing the phase inversion switch for Output B for our pedal.
| Electronic Part | Action | Phase State |
|---|---|---|
| (switchable) IC2b | Inverts | Inverted (Output B) |
Pedal Manual
As of this time, BYOC has not issued a separate manual on how to use the pedal. The best reference is either this wiki page, or the instruction manual (linked above in General Information) at Buildyourownclone.com which describes the architecture of, and how to build the pedal.
Schematic
- Additional Sources
