Akashic Guitar effects circuit lookup
ODINTENSITYRANGESWEEPSWPMOD

Enclosure not stated · 5 knobs

Lectric-FX

Countdown Phaser

Category
Phaser
Controls
Od · Intensity · Range · Sweep · Swpmod
Price
$17.99in stock

From the vendor

The Countdown phaser is a reproduction of the A/DA Final Phase circuit, vintage 1979, somewhat different from the reissue. It has been designed for true bypass, and uses a charge pump/regulator setup for 15V operation using a standard 9V power supply. 🙂

Has a built in overdrive operated by a separate footswitch.

Expert level build, due to the size of the board and volume of components.

Note: There are lots of different widths of DC/IN/OUT jacks. I tried to make the drilling template where the widest of everything would fit, but it might be pretty tight up there the way I have it. If your jacks are skinnier you could move them a bit closer together and have some more clearance from the pcb sides on the right & left. In other words, I might recommend eyeballing those top mount holes for your own i/o/dc jacks before deciding exactly where to drill.

Click this link for Bill of Materials

Click pdf icon for the rest of the build documentation. Note: There are no significant differences between the V1.0 and V1.1 pcb’s. Please continue to use the same doc. 🙂

Schematic

The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 170 rows

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RefValueNormalizedTypeNotes
Resistors 94
R11k1k
R24k74.7k
R347k47k
R468k68k
R568k68k
R647R47
R71M1M
R810k10k
R9300k300k
R1010k10k
R1136k36k
R12150k150k
R13150k150k
R141k51.5k
R15220k220k
R16220k220k
R17220k220k
R1827k27k
R1910k10k
R2047k47k
R21150k150k
R2220k20k
R2320k20k
R242k2k
R2515k15k
R2615k15k
R271k1k
R2820k20k
R2920k20k
R302k2k
R3120k20k
R3220k20k
R332k2k
R3415k15k
R3515k15k
R361k1k
R3720k20k
R3820k20k
R392k2k
R4047R47
R41220k220k
R4220k20k
R43110k110k
R4460k460.4k
R45220k220k
R46220k220k
R4720k20k
R4820k20k
R492k2k
R5015k15k
R5115k15k
R521k1k
R5320k20k
R5420k20k
R552k2k
R56220k220k
R5720k20k
R58110k110k
R5960k460.4k
R60220k220k
R61220k220k
R6236k36k
R6316k16k
R6468k68k
R65100k100k
R6651k51k
R6747R47
R6822k22k
R69100k100k
R70510k510k
R71510k510k
R721M1M
R7347k47k
R74150k150k
R75100k100k
R76100k100k
R772k72.7k
R7851k51k
R792k2k
R8068k68k
R81100k100k
R8227k27k
R8347R47
R8447k47k
R8510k10k
R8610k10k
R8747R47
R881M1M
R89200R200
R9020k20k
R9147R47
R921k1k
R9327k27k
R942M22.2M
Capacitors 47
C1100n100n
C22n72.7n
C34u74.7u
C44u74.7u
C54u74.7u
C6470n470n
C7470n470n
C82u22.2u
C9470n470n
C101n1n
C11100n100n
C121n1n
C1310u10u
C141n1n
C151n1n
C1610u10u
C171n1n
C1822u22u
C1910u10u
C201n1n
C211n1n
C221n1n
C2310u10u
C241n1n
C251u1u
C261n1n
C271n1n
C2810n10n
C291u1uFILM
C304u74.7u
C31100n100n
C324u74.7u
C3333u33u
C3433u33u
C3522u22u
C364u74.7u
C37100n100n
C3822u22u
C39100p100p
C401u1u
C4122u22u
C42220u220u
C4310u10u
C44100u100u
C4510u10u
C4768p68p
C48220p220p
Diodes 8
D11n9141N914
D21n9141N914
D31n9141N914
D41n9141N914
D51n40021N4002
D61n58171N5817
D71n58171N5817
D81n58171N5817
ICs 12
IC1TL072TL072
IC2LM348NLM348N
IC3LM348NLM348N
IC4LM348NLM348N
IC5LM324NLM324N
IC6LM1458NLM1458N
IC7CD4007UBECD4007UBE
IC8CD4047BECD4047BE
IC9CD4016BECD4016BE
IC10CD4016BECD4016BE
IC11LT1054LT1054
IC12LM78L15LM78L15
Potentiometers 5
OD50KBB50k
INTENSITY10KBB10k
RANGE50KBB50k
SWEEP500KCC500k
SWPMOD50KBB50k
Trimmers 4
INTENSE20k20k
CLKRANGE20k20k
LEVEL20k20k
MAXFRE20k20k