The Lineal is a neutral Volume-Booster based on the EH Linear Power Booster. It needs very few parts, so it is perfect for beginners.
This kit contains all parts you need to build a fully functional effect pedal.
Not included in the kit, but also good to have:
- Aluminium enclosure: select one above
- 9V battery or DC power supply
- A nice knob for the pot
- Decal, transfer or transparent sheets for labeling
You can find a partlist here: The Lineal Parts List.
Schematic and board layout: The Lineal Schematic
Enclosure Layout: The Lineal Enclosure Layout
Wiring layout: The Lineal Wiring Layout
Author: Rune O. am 14/09/2012
This is an excellent copy of the EH Linear Power Booster, and it does a good job at that. I, however, had other expectations, and I had to modify it for my use. My main concern is the fact that this is said to be a "neutral" volume booster. First, is not tonally neutral, but it isn't overly bassy or trebly. To me it sounds like it puts a bit more focus on the lower midrange, adding some warmth. I find this colouring to sound pretty good, actually. What is worse to me is that it is not clean on hotter pickups. And this is regardles of setting of the volume knob, since the boost uses a fixed amplification (about 18x the input signal level) common emitter amplifier circuit that is placed before the volume knob. On hot pickups (high output signal) this means it clips, which is similar to the original pedal design. For my use, this boost has too much amplifiction and clips with ugly distortion on several of my pickups, so I had to lower the boost amplification to around 4x. I did this by replacing 4 resistors: R2: 120k R3: 560k R4: 1,5k R5: 8,2k Now the circuit works a lot better for my use (clean, neutral boost) on most of my pickups. The hottest pickup still clips, but for that pickup I will only use the boost to fatten up overdrive anyway, and the clipping only adds a little edge that is useful in that setting. After my modification I am very pleased, but people should be aware that this design clips on most but the lowest output pickups, adding solid state distortion. People knowing and wanting the original EH LPB pedal need not worry. Musikding The Lineal sounds very much like it.
Author: Enrico Laguzzi am 16/12/2007
This is an excellent booster, very silent and with a warm sound. According to my ears it's not 100% transparent, but still very useful for solos. Very easy to build.
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This Product was added to our catalogue on Monday 25 April, 2005.