Enclosure not stated · 4 knobs
BJFe Universal Reverb V2 / Capitalist Death Cult Actual G*ddamned SpringsVerified
Based on the BJFe Universal Reverb V2 / Capitalist Death Cult Actual G*ddamned Springs
From the post
Heavily modified revebr unit by BJFe, treated by Chris Stelloh.
A couple of the tweaks are from Björn - in particular, the 2k2 resistor from the source of Q1 to ground. Lowering that value fixes a volume drop that can happen when the 50k dwell pot is maxed. I replaced the second dwell pot with a 10 ohm fixed resistor, so that it is almost at maximum. I also added a flat-mids BMP tone control and BC337 recovery stage that sounds really great paired with this circuit. Using a PN3269a in Q2 can squeal with feedback (a GOOD thing in my world) so dialing in the 10k output trimpot is a necessary step. It is possible to set it so that it only howls when the dwell+mix are turned to maximum. The charge pump is something I redrew from an old tagboard layout. The 555 doubler puts out 30mA of current which this verb circuit needs most of (the schematic says it draws around 20mA, and that was before I added the extra transistor) no matter what voltage you are running it at.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 46 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 2 values the reader of this layout was not sure of
- 2m resistor at column 4, rows I-L of the main board: partly hidden under the Q1 body, read as 2m
- 220nF at column 5, rows P-R of the main board: last letter hidden under Q3, read as 220nF
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 20 | ||||
| ×5 | 10k | 10k | read from the layout by eye | |
| ×3 | 100k | 100k | read from the layout by eye | |
| ×2 | 220k | 220k | read from the layout by eye | |
| ×2 | 15k | 15k | read from the layout by eye | |
| ×2 | 33k | 33k | one on each board; read from the layout by eye | |
| ×2 | 1m | 1M | read from the layout by eye | |
| ×2 | 2m | 2M | read from the layout by eye | |
| ×2 | 10Ω | 10 | read from the layout by eye | |
| ×1 | 150k | 150k | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 7k5 | 7.5k | read from the layout by eye | |
| ×1 | 39k | 39k | read from the layout by eye | |
| ×1 | 22k | 22k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 120k | 120k | read from the layout by eye | |
| ×1 | 2k2 | 2.2k | read from the layout by eye | |
| ×1 | 330Ω | 330 | read from the layout by eye | |
| ×1 | 2k | 2k | read from the layout by eye | |
| ×1 | 390R | 390 | read from the layout by eye | |
| ×1 | 1k | 1k | supply board; read from the layout by eye | |
| Capacitors 11 | ||||
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×2 | 1nF | 1n | one on each board; read from the layout by eye | |
| ×3 | 10nF | 10n | two on the main board, one on the supply board; read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×3 | 220nF | 220n | read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×3 | 4u7 | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×4 | 220uF | 220u | electrolytic; two on each board; read from the layout by eye | |
| ×1 | 470uF | 470u | electrolytic; supply board; read from the layout by eye | |
| Diodes 1 | ||||
| ×3 | 1N4001 | 1N4001 | D1-D3, supply board; read from the layout by eye | |
| Transistors 6 | ||||
| Q1 | J112 | J112 | JFET; read from the layout by eye | |
| Q2 | PN2369A | PN2369A | read from the layout by eye | |
| Q3 | BC549C | BC549C | read from the layout by eye | |
| Q4 | BC549C | BC549C | read from the layout by eye | |
| Q5 | J112 | J112 | JFET; read from the layout by eye | |
| Q6 | BC337 | BC337 | read from the layout by eye | |
| ICs 2 | ||||
| IC1 | 555 | 555 | supply board; read from the layout by eye | |
| Reg | L78L12 | L78L12 | regulator, supply board; read from the layout by eye | |
| Potentiometers 4 | ||||
| Dwell | C50K | C50k | Potentiometer | read from the layout by eye |
| Verb Mix | A25K | A25k | Potentiometer | read from the layout by eye |
| Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| Level | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 10k | 10k | read from the layout by eye | |
| Other 1 | ||||
| Reverb | Accutronics AMC2BF3 | ACCUTRONICS AMC2BF3 | spring reverb tank (long), off board; read from the layout by eye | |