Enclosure not stated · 5 knobs
Countdown Phaser
- Category
- Phaser
- 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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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 94 | ||||
| R1 | 1k | 1k | ||
| R2 | 4k7 | 4.7k | ||
| R3 | 47k | 47k | ||
| R4 | 68k | 68k | ||
| R5 | 68k | 68k | ||
| R6 | 47R | 47 | ||
| R7 | 1M | 1M | ||
| R8 | 10k | 10k | ||
| R9 | 300k | 300k | ||
| R10 | 10k | 10k | ||
| R11 | 36k | 36k | ||
| R12 | 150k | 150k | ||
| R13 | 150k | 150k | ||
| R14 | 1k5 | 1.5k | ||
| R15 | 220k | 220k | ||
| R16 | 220k | 220k | ||
| R17 | 220k | 220k | ||
| R18 | 27k | 27k | ||
| R19 | 10k | 10k | ||
| R20 | 47k | 47k | ||
| R21 | 150k | 150k | ||
| R22 | 20k | 20k | ||
| R23 | 20k | 20k | ||
| R24 | 2k | 2k | ||
| R25 | 15k | 15k | ||
| R26 | 15k | 15k | ||
| R27 | 1k | 1k | ||
| R28 | 20k | 20k | ||
| R29 | 20k | 20k | ||
| R30 | 2k | 2k | ||
| R31 | 20k | 20k | ||
| R32 | 20k | 20k | ||
| R33 | 2k | 2k | ||
| R34 | 15k | 15k | ||
| R35 | 15k | 15k | ||
| R36 | 1k | 1k | ||
| R37 | 20k | 20k | ||
| R38 | 20k | 20k | ||
| R39 | 2k | 2k | ||
| R40 | 47R | 47 | ||
| R41 | 220k | 220k | ||
| R42 | 20k | 20k | ||
| R43 | 110k | 110k | ||
| R44 | 60k4 | 60.4k | ||
| R45 | 220k | 220k | ||
| R46 | 220k | 220k | ||
| R47 | 20k | 20k | ||
| R48 | 20k | 20k | ||
| R49 | 2k | 2k | ||
| R50 | 15k | 15k | ||
| R51 | 15k | 15k | ||
| R52 | 1k | 1k | ||
| R53 | 20k | 20k | ||
| R54 | 20k | 20k | ||
| R55 | 2k | 2k | ||
| R56 | 220k | 220k | ||
| R57 | 20k | 20k | ||
| R58 | 110k | 110k | ||
| R59 | 60k4 | 60.4k | ||
| R60 | 220k | 220k | ||
| R61 | 220k | 220k | ||
| R62 | 36k | 36k | ||
| R63 | 16k | 16k | ||
| R64 | 68k | 68k | ||
| R65 | 100k | 100k | ||
| R66 | 51k | 51k | ||
| R67 | 47R | 47 | ||
| R68 | 22k | 22k | ||
| R69 | 100k | 100k | ||
| R70 | 510k | 510k | ||
| R71 | 510k | 510k | ||
| R72 | 1M | 1M | ||
| R73 | 47k | 47k | ||
| R74 | 150k | 150k | ||
| R75 | 100k | 100k | ||
| R76 | 100k | 100k | ||
| R77 | 2k7 | 2.7k | ||
| R78 | 51k | 51k | ||
| R79 | 2k | 2k | ||
| R80 | 68k | 68k | ||
| R81 | 100k | 100k | ||
| R82 | 27k | 27k | ||
| R83 | 47R | 47 | ||
| R84 | 47k | 47k | ||
| R85 | 10k | 10k | ||
| R86 | 10k | 10k | ||
| R87 | 47R | 47 | ||
| R88 | 1M | 1M | ||
| R89 | 200R | 200 | ||
| R90 | 20k | 20k | ||
| R91 | 47R | 47 | ||
| R92 | 1k | 1k | ||
| R93 | 27k | 27k | ||
| R94 | 2M2 | 2.2M | ||
| Capacitors 47 | ||||
| C1 | 100n | 100n | ||
| C2 | 2n7 | 2.7n | ||
| C3 | 4u7 | 4.7u | ||
| C4 | 4u7 | 4.7u | ||
| C5 | 4u7 | 4.7u | ||
| C6 | 470n | 470n | ||
| C7 | 470n | 470n | ||
| C8 | 2u2 | 2.2u | ||
| C9 | 470n | 470n | ||
| C10 | 1n | 1n | ||
| C11 | 100n | 100n | ||
| C12 | 1n | 1n | ||
| C13 | 10u | 10u | ||
| C14 | 1n | 1n | ||
| C15 | 1n | 1n | ||
| C16 | 10u | 10u | ||
| C17 | 1n | 1n | ||
| C18 | 22u | 22u | ||
| C19 | 10u | 10u | ||
| C20 | 1n | 1n | ||
| C21 | 1n | 1n | ||
| C22 | 1n | 1n | ||
| C23 | 10u | 10u | ||
| C24 | 1n | 1n | ||
| C25 | 1u | 1u | ||
| C26 | 1n | 1n | ||
| C27 | 1n | 1n | ||
| C28 | 10n | 10n | ||
| C29 | 1u | 1u | FILM | |
| C30 | 4u7 | 4.7u | ||
| C31 | 100n | 100n | ||
| C32 | 4u7 | 4.7u | ||
| C33 | 33u | 33u | ||
| C34 | 33u | 33u | ||
| C35 | 22u | 22u | ||
| C36 | 4u7 | 4.7u | ||
| C37 | 100n | 100n | ||
| C38 | 22u | 22u | ||
| C39 | 100p | 100p | ||
| C40 | 1u | 1u | ||
| C41 | 22u | 22u | ||
| C42 | 220u | 220u | ||
| C43 | 10u | 10u | ||
| C44 | 100u | 100u | ||
| C45 | 10u | 10u | ||
| C47 | 68p | 68p | ||
| C48 | 220p | 220p | ||
| Diodes 8 | ||||
| D1 | 1n914 | 1N914 | ||
| D2 | 1n914 | 1N914 | ||
| D3 | 1n914 | 1N914 | ||
| D4 | 1n914 | 1N914 | ||
| D5 | 1n4002 | 1N4002 | ||
| D6 | 1n5817 | 1N5817 | ||
| D7 | 1n5817 | 1N5817 | ||
| D8 | 1n5817 | 1N5817 | ||
| ICs 12 | ||||
| IC1 | TL072 | TL072 | ||
| IC2 | LM348N | LM348N | ||
| IC3 | LM348N | LM348N | ||
| IC4 | LM348N | LM348N | ||
| IC5 | LM324N | LM324N | ||
| IC6 | LM1458N | LM1458N | ||
| IC7 | CD4007UBE | CD4007UBE | ||
| IC8 | CD4047BE | CD4047BE | ||
| IC9 | CD4016BE | CD4016BE | ||
| IC10 | CD4016BE | CD4016BE | ||
| IC11 | LT1054 | LT1054 | ||
| IC12 | LM78L15 | LM78L15 | ||
| Potentiometers 5 | ||||
| OD | 50KB | B50k | ||
| INTENSITY | 10KB | B10k | ||
| RANGE | 50KB | B50k | ||
| SWEEP | 500KC | C500k | ||
| SWPMOD | 50KB | B50k | ||
| Trimmers 4 | ||||
| INTENSE | 20k | 20k | ||
| CLKRANGE | 20k | 20k | ||
| LEVEL | 20k | 20k | ||
| MAXFRE | 20k | 20k | ||