1590BB · 4 knobs
Tv Channel, Dual Channel Overdrive
Based on the EarthQuaker Devices Grey Channel· 4 other boards clone it
- Category
- Distortion· Dual Channel Overdrive
- Difficulty
- Medium
- Price
- €8.90out of stock
Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.
From the vendor
Project overview
The TV Channel is based around a classic hard-clipping overdrive, the DOD 250/Distortion +; the people from EQD took the base of this classic drive and took it one step further adding, making it double, and adding 3 clipping options per channel.
Introduction
This circuit has been developed by the people from Earthquaker inspired on one of the most classic and iconic overdrives, the DOD 250/Distortion+.
The concept of the TV Channel is simple yet effective. It consists of two DOD250 circuits placed on the same board, each with 3 different clipping options and a toggle to select which one to activate.
On Channel “ONE,” you can choose between the “Silicon” mode will be bright/loud/fuzzy and has a natural tube type break up. “Germanium” mode is a little looser with more lows and warmth and less output.
On Channel “TWO” LED mode is the loudest, cleanest, and most touch sensitive/least compressed. “Mosfet” mode is the most compressed with a tighter crunch, the group’s biggest hesher.
Controls
Green Controls
• Gain: Adjusts the drive, dirtier clockwise, cleaner counterclockwise
• Green: Sets the output level when the green LED is lit.
• Toggle: Silicon clipping, No clipping, Germanium Clipping
• Red Controls
• Gain: Adjusts the drive, dirtier clockwise, cleaner counterclockwise
• Red: Sets the output level when the red LED is lit.
• Toggle: LED clipping, “No clipping, Mosfet Clipping
Foot-switches
• Channel Switch: Selects between Red and Green channels
• Activate Switch: Turns the effect on and off.
For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.
TV Channel 1.1v – Building Docs
TV Channel 1.0v – Building Docs
TV Channel – 1590BB Drilling Template A4
Schematic
The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 48 rows
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ocr read from an image · sch paired from the schematic · fixed corrected by hand. Check marked values against the build document.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 16 | ||||
| R1 | 10K | 10k | ||
| R2 | 470K | 470k | ||
| R3 | 1M | 1M | ||
| R4 | 47K | 47k | ||
| R5 | 10K | 10k | ||
| R6 | 10K | 10k | ||
| R7 | 470K | 470k | ||
| R8 | 1M | 1M | ||
| R9 | 47K | 47k | ||
| R10 | 10K | 10k | ||
| R11 | 4k7 | 4.7k | ||
| R12 | 4k7 | 4.7k | ||
| R13 | 20k | 20k | ||
| R14 | 20k | 20k | ||
| R15 | 1m | 1M | ||
| R16 | 1m | 1M | ||
| Capacitors 14 | ||||
| C2 | 10nf | 10n | ||
| C3 | 47nf | 47n | ||
| C4 | 25pf | 25p | ||
| C6 | 2.2nf | 2.2n | ||
| C7 | 2.2nf | 2.2n | ||
| C8 | 10nf | 10n | ||
| C9 | 47nf | 47n | ||
| C10 | 25pf | 25p | ||
| C5 | 22uf | 22u | ||
| C11 | 22uf | 22u | ||
| C12 | 2.2nf | 2.2n | ||
| C13 | 100uf | 100u | ||
| C14 | 10uf | 10u | ||
| C1 | 2.2nf | 2.2n | ||
| Diodes 8 | ||||
| D3 | 1N34A | 1N34A | ||
| D4 | 1N34A | 1N34A | ||
| D5 | 3mm | 3MM | ||
| D6 | 3mm | 3MM | ||
| D7 | 3mm | 3MM | ||
| D9 | 1n5817 | 1N5817 | ||
| D1 | 1N4148 | 1N4148 | ||
| D2 | 1N4148 | 1N4148 | ||
| Transistors 2 | ||||
| Q1 | 2n7000 | 2N7000 | ||
| Q2 | 2n7000 | 2N7000 | ||
| ICs 1 | ||||
| IC1 | LM1458 | LM1458 | ||
| Potentiometers 4 | ||||
| VOL | A100kfixed | A100k | ||
| VOL1 | A100kfixed | A100k | ||
| GAIN | B1Mfixed | B1M | ||
| GAIN1 | B1Mfixed | B1M | ||
| Switches 2 | ||||
| SW1 | ON-OFF-ON | ON-OFF-ON | ||
| SW2 | ON-OFF-ON | ON-OFF-ON | ||
| LEDs 1 | ||||
| LED1 | Dual | DUAL | ||
Other boards based on the EarthQuaker Devices Grey Channel
- Earthquaker Devices Grey Channel Dirtbox Layouts
- Earthquaker Devices Grey Channel Effects Layouts (blog)
- Grey Channel PCBWay: Glory to Ukraine
- Earthquaker Devices Grey Channel Tagboard Effects