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EMBER METAL DISTORTION

1

PROJECT NAME

EMBER

BASED ON

EFFECT TYPE

PROJECT SUMMARY

DOCUMENT VERSION

Amptweaker Tight Metal / Tight Rock

A high-gain metal & hard rock distortion pedal by James Brown, formerly of Peavey where he designed 
Eddie Van Halen’s 5150 and Joe Satriani’s JSX amps.

Distortion

1.0.0 (2022-11-25)

BUILD DIFFICULTY

Advanced

Actual size is 3.44” x 2.42” (main board) and 3.44” x 0.97” (bypass board).

Summary of Contents for EMBER

Page 1: ...mptweaker Tight Metal Tight Rock A high gain metal hard rock distortion pedal by James Brown formerly of Peavey where he designed Eddie Van Halen s 5150 and Joe Satriani s JSX amps Distortion 1 0 0 2022 11 25 BUILD DIFFICULTY Advanced Actual size is 3 44 x 2 42 main board and 3 44 x 0 97 bypass board ...

Page 2: ...also used by the Friedman BE OD Dirty Shirley pedals and a number of classic high gain amplifiers Bass frequencies often have a flabby or boomy character especially when palm muting so by dampening these frequencies the tone is more percussive and cutting The Tight Metal is very similar to another Amptweaker circuit the Tight Rock with only a few differences The Ember project incorporates these ch...

Page 3: ...les it when turned all the way down Tone is a Big Muff style balance control that pans between a bass emphasis on the left and a treble emphasis to the right with the 12 00 position being roughly flat Style toggle switches between Rock and Metal modes Mids toggle engages a midrange scoop mode that depends on the position of the Style switch Metal mode has a steeper scoop is called Thrash Rock mode...

Page 4: ...or 1 4W R8 1k5 Metal film resistor 1 4W R9 220k Metal film resistor 1 4W R10 475k Metal film resistor 1 4W R11 22k Metal film resistor 1 4W R12 10k Metal film resistor 1 4W R13 10k Metal film resistor 1 4W R14 10k Metal film resistor 1 4W R15 470k Metal film resistor 1 4W R16 3k3 Metal film resistor 1 4W R17 4k7 Metal film resistor 1 4W R18 1k5 Metal film resistor 1 4W R19 3k3 Metal film resistor ...

Page 5: ...pacitor 7 2 x 2 5mm C5 100n Film capacitor 7 2 x 2 5mm C6 100pF MLCC capacitor NP0 C0G C7 33n Film capacitor 7 2 x 2 5mm C8 47n Film capacitor 7 2 x 2 5mm C9 100n Film capacitor 7 2 x 2 5mm C10 3n3 Film capacitor 7 2 x 2 5mm C11 220n Film capacitor 7 2 x 2 5mm C12 100n Film capacitor 7 2 x 2 5mm C13 22uF Electrolytic capacitor 5mm C14 100n Film capacitor 7 2 x 2 5mm C15 22n Film capacitor 7 2 x 2 ...

Page 6: ... DO 41 D6 1N914 Fast switching diode DO 35 D7 1N914 Fast switching diode DO 35 D8 1N4733A Zener diode 5 1V DO 41 D9 1N5817 Schottky diode DO 41 D10 1N5817 Schottky diode DO 41 IC1 TL072 Operational amplifier DIP8 IC1 S DIP 8 socket IC socket DIP 8 IC2 TL072 Operational amplifier DIP8 IC2 S DIP 8 socket IC socket DIP 8 IC3 TL072 Operational amplifier DIP8 IC3 S DIP 8 socket IC socket DIP 8 IC4 LT10...

Page 7: ...SPDT Toggle switch SPDT on on LED 5mm LED 5mm red diffused DC 2 1mm DC jack 2 1mm panel mount Mouser 163 4302 E or equivalent IN 1 4 mono 1 4 phone jack closed frame Switchcraft 111X or equivalent OUT 1 4 mono 1 4 phone jack closed frame Switchcraft 111X or equivalent BYPASS 3PDT Stomp switch 3PDT ENCLOSURE 1590BBS Enclosure die cast aluminum ...

Page 8: ...es will need to be in the same position for it to be identical to either of the original circuits However the effect of the Cut switch is minimal compared to the Style switch Gate design In the original pedal the noise gate was tied to the drive control A dual potentiometer controlled both the gain level and the gate threshold so as the gain was turned up the gating was more aggressive Separate fr...

Page 9: ...e Love My Switches sells two different types and the CNC Pro version is correct while the standard one is too short The 1590BB2 seems like a close equivalent but it s about 4mm shorter It may be possible to fit this circuit in a 1590BB2 but we have not tested it so you re on your own Another alternative is the 1590C also available from Tayda and Love My Switches It s about 10mm taller than necessa...

Page 10: ... GND 3k3 330R 47n 100n 22n 100n 3k3 3k3 22n 220n 10kA 220k 100k 1n2 470k 100n 47k GND 1k 220n 33k GND 100R 100n GND 100R 100n GND 100R 100n GND VA VB VC VD VE VD VD VD VE VE VE VA VB VC D1 1 2 3 GATE TIGHT 1 2 3 TONE 1 2 3 1 2 3 GAIN RPD C30 Z1 GAIN SW 2 3 1 MIDS 2 3 1 CUT 2 3 1 STYLE A A2 A3 A1 STYLE B B2 B3 B1 1 2 3 4 5 6 7 8 IC4 D9 D10 C32 C35 C33 C34 C31 C1 R1 R33 C27 R34 R35 C28 R36 R37 C29 C...

Page 11: ...D hole drill size assumes the use of a 5mm LED bezel available from several parts suppliers Adjust size accordingly if using something different such as a 3mm bezel a plastic bezel or just a plain LED 0 1 2 CM 0 1 INCH 1590BBS x 0 y 1 775 ø15 32 x 0 775 y 1 775 ø5 16 ø3 8 ø1 2 0 385 0 9 0 9 ø3 8 OUT DC IN FOOTSWITCH LED x 1 35 y 1 71 ø9 32 x 0 45 y 1 71 ø9 32 x 0 45 y 1 71 ø9 32 x 1 35 y 1 71 ø9 3...

Page 12: ...EMBER METAL DISTORTION 12 ENCLOSURE LAYOUT Enclosure is shown without jacks See next page for jack layout and wiring 1590BBS ...

Page 13: ...EMBER METAL DISTORTION 13 WIRING DIAGRAM IN V GND PGND NC OUT PCB IN GND 18V V JACK GND JACK OUT IN 9V GND PCB OUT ...

Page 14: ...y as suggestions based on the experience and opinions of others Projects may be used for commercial endeavors in any quantity unless specifically noted No attribution is necessary though a link back is always greatly appreciated The only usage restrictions are that 1 you cannot resell the PCB as part of a kit without prior arrangement and 2 you cannot goop the circuit scratch off the screenprint o...

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