TR-808 CLONE PARTLIST last update : 2005-03-10 19:46:42
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The parts marked with "MOD" are for the modifications, if you want an original TR-808 clone without any changes these parts can be left out.
In this case some changes are needed :
Where a on/off Switch for the Function is build in a bridge is needed, where pots are used a resistor must be mounted instead of a connector ...
The original Values will be in the following module list.

First i´ve used BC639 NPN and BC640 PNP Transistors in my prototyp and in most cases they worked fine -
only in the noise generator i noticed a big change when the original 2SC828 (RNZ) was finaly used.

But i think the original ones are a better choice ...

www.Reichelt.de has all the original Japan Transistors

PARTLIST

BD

1x 2SA733 (P) / BC640... PNP Transistor
5x 2SC945 (P) / BC639... NPN Transistor
2x 1N4148 Diode
1x TL072 + socket Dual OP-AMP

2x 47µ/16v (PSU) Electrolytic Caps
1x 33µ/6,3v
2x 0,47µ/50v
1x 1µ/50v

1x 220p Caps
3x 15n
1x 33n
2x 100n

1x 500k (B) Potentiometers DECAY
1x 10K (A) TONE
1x 100K (B) VOLUME
2x 100K (A) TUNE, DECAY BOOST MOD
1x 4,7K (A) TUNE ENVELOPE MOD

2x Switch on/on TUNE BYPASS 1, 2 MOD

1/4W 1%: Resistors
3x 1M
1x 370k (decay mod)
4x 100k
1x 82k
3x 47k
3x 22k
3x 10k
1x 8,2k
2x 6,8k
2x 4,7k
1x 2,7k
1x 2,2k (env mod)
1x 1k
1x 220
2x 100 (psu)

SD

1x 2SA733 (P) / BC640... PNP Transistor
4x 2SC945 (P) / BC639... NPN Transistor
1x 1N4148 Diode
2x TL072 + socket Dual OP-AMP
1x 47µ/50v Electrolytic Caps
2x 47µ/16v (PSU)
1x 47µ/16v
1x 33µ/6,3v
1x 220p Caps
1x 1n
2x 1,8n
1x 2,7n
3x 6,8n
1x 10n
1x 22n
2x 27n
2x 47n
1x 100n

1x100k (A) Potentiometers VOLUME
1x100k (B) TONE
1x 10k (B) SNAPPY
2x 1M (A) TUNE OSC 1, 2 MOD
1x 4,7K (A) or better a 10k neg.Log. FILTER MOD (R201 - 22K)
1x 220k (B) DECAY MOD
2x Switch on/on TUNE BYPASS 1, 2 MOD

1/4W 1%: Resistors
1x 2,2M
1x 1M
1x 820k
3x 470k (2 for TUNE mod)
2x 100k
3x 47k
1x 33k
1x 27k
4x 22k (1 for DECAY mod)
2x 15k
2x 10k
1x 8,2k
1x 4,7k
1x 2,7k
2x 1k
2x 680
1x 330
1x 220
2x 100
2x 100 (PSU)

HHs

9x 2SC945(P) / BC639... NPN Transistor
5x 2SA733 (P) / BC640... PNP Transistor
1x TL072 Dual OP-AMP
2x 1N4148 Diode
2x 47µ/16v (PSU) Electrolytic Caps
2x 33µ/6,3v
2x 0,47µ/50v
1x 47µ/16v
1x 10µ/16v
2x 220p Caps
2x 470p
2x 1n
6x 1,5n
2x 22n

1x 2,2M (B) Potentiometers OH DECAY
2x 100k (A) VOLUME CH, OH
2x 22k (B) FILTER CH, OH MOD (R147, R153 - 2,7K)
1x Switch on/on SOURCE: NOISE / SCHMITT MOD

1/4W 1%: Resistors
5x 1M
2x 470k
1x 330k
2x 100k
2x 68k
2x 47k
7x 33k
8x 22k
5x 10k
2x 4,7k
2x 2,7k
2x 1k
2x 470
1x 220
3x 100
2x 100 (PSU)

CLAP

4x 2SC945 (P) / BC639... NPN Transistor
3x 2SA733 (P) / BC640... PNP Transistor
1x TL072 Dual OP-AMP
1x LM339 Quad Comparator(fixed)
1x CA3080 OTA
4x 1N4148 Diode
2x47µ/16v (PSU) Electrolytic Cap
1x 0,47µ/50v
1x 1/50
1x 33µ/6,3v
1x 220p Caps
2x 1n
1x 1,8n
3x 4,7n
2x 18n
1x 22n
1x 27n
1x 33n
1x 47n

1/4W 1%: Resistors
4x 1M
2x 470k
1x 330k
2x 100k
2x 82k
2x 68k
3x 47k
1x 39k
2x 27k
2x 22k
3x 15k
6x 10k
1x 5,6k
4x 4,7k
1x 2,7k
1x 2,2k
3x 1k
1x 680
2x 330
2x 100 (PSU)

1x100k (A) Potentiometers VOLUME
1x10k (B) Trim OFFSET

MARACAS

3x 2SC945 (P) / BC639... NPN Transistor
3x 2SA733 (P) / BC640... PNP Transistor
1x TL071 OP-AMP
3x 1N4148 Diode
2x 47µ/16v (PSU) Electrolytic Cap
1x 33µ/6,3v
1x 220p Caps
2x 1n
1x 10n
1x 33n
1x 47n
1x 100n

1x 100k (A) Potentiometers VOLUME
1x 22k (B) FILTER MOD (R339 - 3,3K)

1/4W 1%: Resistors
1x 1M
2x 470k
1x 220k
1x 150k
2x 100k
1x 68k
1x 47k
2x 22k
3x 10k
1x 6,8k
1x 4,7k
1x 3,3k
1x 1k
2x 100 (PSU)

CYMBAL

7x 2SC945 (P) / BC639... NPN Transistor
1x 2SA733 (P) / BC640... PNP Transistor
3x TL072 Dual OP-AMP
6x 1N4148 Diode
2x47µ/16v (PSU) Electrolytic Cap
1x 0,47µ/50v
3x 1µ/50v
2x 2,2µ/50v
1x 33µ/6,3v
1x 47µ/16v
1x 220p Caps
5x 1n
6x 1,5n
5x 3,3n
2x 6,8n
4x 10n
3x 22n

1/4W 1%: Resistors
6x 1M
2x 470k
1x 100k
3x 82k
1x 47k
3x 39k
6x 33k
11x 22k
3x 18k
1x 15k
5x 10k
1x 4,7k
1x 2,2k
1x 1k
2x 560
5x 100
2x 100 (PSU)

1x100k (A) Potentiometers VOLUME
1x20k (B) TONE
1x2m (B) DECAY

COWBELL

3x 2SC945 (P) / BC639... NPN Transistor
1x 2SA733 (P) / BC640... PNP Transistor
3x 1N4148 Diode
1x TL072 Dual OP-AMP
2x 47µ/16v (PSU) Electrolytic Caps
1x 0,47µ/16v
2x 1µ/50v
2x 10µ/16v
2x 2,2n Caps
1x 3,3n
1x 10n
1x 22n

1x 100k (A) Potentiometer VOLUME

1/4W 1%: Resistors
3x 470k
2x 100k
1x 33k
3x 22k
3x 10k
1x 8,2k
1x 4,7k
1x 2,2k
2x 1k
2x 100
2x 100 (PSU)

RIMSHOT/CLAVE

4x 2SC945 (P) / BC639... NPN Transistor
1x 2SA733 (P) / BC640... PNP Transistor
1x 2SK30 (Y) Transistor
1x TL074 Quad OP-AMP
4x 1N4148 Diode
2x 47µ/16v (PSU) Electrolytic Caps
1x 33µ/6,3v
1x 10µ/16v
1x 0,47µ/50v
1x 22p Caps
1x 1n
3x 2,2n
4x 4,7n
2x 10n
1x 22n
1x 47n

1x100k (A) Potentiometers VOLUME
2x1M (A) TUNE OSC 1,2 MOD
1x22k (A) FILTER MOD (R322 - 10k)

4x Switch on/on TUNE BYPASS 1,2 MOD
+ RIM / CLAVE (two parts) (2 SW. needed)

1/4W 1%: Resistors
1x 2,2M
2x 1M
1x 820k
2x 470k
1x 390k
1x 330k
2x 220k
1x 100k
3x 47k
3x 33k
5x 22k
8x 10k
1x 5,6k
1x 4,7k
3x 1k
2x 100 (PSU)

LOW TOM / LOW CONGA

2x 2SC945 (P) / BC639... NPN Transistor
1x 2SA733 (P) / BC640... PNP Transistor
1x TL074 Quad OP-AMP
2x 1N4148 Diode
2x 1S188FM / 1N60 Germanium Diode
2x47µ/16v (PSU) Electrolytic Cap
1x 33µ/6,3v
1x 1n Caps
1x 6,8n
1x 12n
1x 18n
1x 39n
4x 47n
1x 56n

1/4W 1%: Resistors
1x 2,2M
2x 820k
1x 470k
2x 100k
1x 47k
3x 33k
4x 22k
1x 15k
2x 10k
5x 4,7k
1x 3,3k
1x 1,5k
2x 1k
2x 100 (PSU)

2x 100k (A) Potentiometers VOLUME, REVERB REVERB=MOD (R232 - 100k)
1x 1k (B) TUNE
1x 2,2M (A) DECAY MOD (change R230 to 820k)

3x Switch on/on TOM / CONGA (three parts)

MED TOM / CONGA

2x 2SC945 (P) / BC639... NPN Transistor
1x 2SA733 (P) / BC640... PNP Transistor
1x TL074 Quad OP-AMP
2x 1N4148 Diode
2x 1S188FM / 1N60 Germanium Diode
2x47µ/16v (PSU) Electrolytic Cap
1x 33µ/6,3v
1x 1n Caps
1x 2,7n
1x 8,2n
1x 12n
1x 15n
2x 27n
2x 33n
1x 39n
1x 47n

1/4W 1%: Resistors
1x 2,2M
2x 820k
1x 470k
2x 100k
1x 47k
3x 33k
4x 22k
1x 15k
2x 10k
1x 6,8k
4x 4,7k
1x3,3k
1x 2,2k
2x 1k
2x 100 (PSU)

2x100k (A) Potentiometers VOLUME, REVERB REVERB=MOD (R261 - 100k)
1x1k (B) TUNE
1x 2,2M (A) DECAY MOD (change R259 to 820k)

4x Switch on/on TOM / CONGA (three parts)

HI TOM / CONGA

2x 2SC945 (P) / BC639... NPN Transistor
1x 2SA733 (P) / BC640... PNP Transistor
1x TL074 Quad OP-AMP
2x 1N4148 Diode
2x 1S188FM / 1N60 Germanium Diode
2x47µ/16v (PSU) Electrolytic Cap
1x 33µ/6,3v
1x 1n Caps
1x 2,7n
1x 5,6n
1x 10n
1x 22n
3x 27n
2x 33n
1x 47n

1/4W 1%: Resistors
1x 2,2M
2x 820k
1x 470k
2x 100k
1x 47k
3x 33k
4x 22k
1x 15k
2x 10k
1x 5,6k
4x 4,7k
1x 3,3k
1x 1,5k
2x 1k
2x 100 (PSU)

2x 100k (A) Potentiometers VOLUME, REVERB REVERB=MOD (R288 - 100k)
1x 1k (B) TUNE
1x 2,2M (A) DECAY MOD (change R286 to 820k)

3x Switch on/on TOM / CONGA (three parts)

NOISE GENERATOR

1x 2SC828 (RNZ) NPN Transistor
1x TL072 Dual OP-AMP
1x 1µ/50v Electrolytic Caps
3x 47µ/16v
1x 18p Caps
1x 22n
1x 39n

1x 22k (A) Potentiometer NOISE LEVEL Trimpot in original ...

1/4W 1%: Resistors
2x 1M
1x 330k
1x 300k
2x 22k
1x 4,7k
3x 100

SCHMITT TRIGGER

1x 2SC945 (P) / BC639... NPN Transistor
1x MOS4584 Hex Schmitt Trigger
2x 47µ/16v (PSU) Electrolytic Cap
1x 100µ/6,3v
2x 10n Caps
3x 18p
1x 22n

2x 220k lin Potentiometer CB TUNE 1, 2 Trimpot in original ...

1/4W 1%: Resistors
1x 680k
2x 560k
1x 220k
1x 150k
6x 120k
2x 33k
1x 10k
1x 5,6k
2x 2,2k

 
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