Enclosure not stated · 3 knobs

Landgraff Dynamic Overdrive (drawn by Clay Jones)

Based on the Landgraff Dynamic Overdrive· 5 other boards clone it

Category: Overdrive
Controls: Drive · Tone · Level
Price: see vendor

Read the post at Revolution Deux Schematic image

From the vendor

Clay Jones's hand drawing of the Landgraff Dynamic Overdrive ('Grand Laff Dynamic Overtype'), a TS808 replica: 2SC1815 input and output buffers around a JRC4558 Tube Screamer clipping stage and tone control. A three-way switch picks TS808 diodes, no diodes, or LED 'Marshall' clipping.

SW1 (SPDT on/none/on): up is TS808 (1N914 diodes), center lifts the diodes, down is 'Marshall' (LEDs). The drawing lists Blue Nichicon filter caps, a Sprague buffer cap, AVX polyester box NP caps, 1/4W carbon comp resistors.

Schematic

The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.

Parts list 40 rows

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Check before you build · 1 value the reader of this schematic was not sure of

The drive pot is drawn as 1Meg with 10 detents; taper not given.

Ref	Value	Normalized	Type	Notes
Resistors 17
R1	1K	1k		read from the schematic by eye
R2	510K	510k		read from the schematic by eye
R3	10K	10k		read from the schematic by eye
R4	10K	10k		read from the schematic by eye
R5	10K	10k		read from the schematic by eye
R6	1K	1k		read from the schematic by eye
R7	1K	1k		read from the schematic by eye
R8	10K	10k		read from the schematic by eye
R9	220	220		read from the schematic by eye
R10	1K	1k		read from the schematic by eye
R11	1K	1k		read from the schematic by eye
R12	510K	510k		read from the schematic by eye
R13	10K	10k		read from the schematic by eye
R14	100	100		read from the schematic by eye
R15	10K	10k		read from the schematic by eye
R16	10K	10k		read from the schematic by eye
R17	10K	10k		read from the schematic by eye
Capacitors 11
C1	20n	20n		input, drawn .02; read from the schematic by eye
C2	1u	1u		non-polar; read from the schematic by eye
C3	51p	51p		read from the schematic by eye
C4	220n	220n		read from the schematic by eye
C5	220n	220n		non-polar; read from the schematic by eye
C6	220n	220n		non-polar; read from the schematic by eye
C7	1u	1u		non-polar; read from the schematic by eye
C8	100n	100n		read from the schematic by eye
C9	10u	10u		electrolytic; read from the schematic by eye
C10	100u	100u		electrolytic; read from the schematic by eye
C11	47u	47u		electrolytic; read from the schematic by eye
Diodes 3
D3	1N914	1N914		clipper; read from the schematic by eye
D4	1N914	1N914		clipper; read from the schematic by eye
D5	1N914	1N914		polarity protection; read from the schematic by eye
Transistors 2
Q1	2SC1815	2SC1815		read from the schematic by eye
Q2	2SC1815	2SC1815		read from the schematic by eye
ICs 1
IC1	JRC4558	JRC4558		A1/A2; read from the schematic by eye
Potentiometers 3
Drive	1M	1M	Potentiometer	10 detents; read from the schematic by eye
Tone	25K	25k	Potentiometer	read from the schematic by eye
Level	100K	100k	Potentiometer	read from the schematic by eye
Switches 1
Clipping switch	SPDT on/off/on	SPDT ON/OFF/ON		SW1; read from the schematic by eye
LEDs 2
D1	LED	LED		clipper; read from the schematic by eye
D2	LED	LED		clipper; read from the schematic by eye

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