Enclosure not stated · 4 knobs
SiB! Electronics Mr Echo DelayVerified
Based on the SiB! Electronics Mr Echo Delay
From the post
Another trace, layout and verification by Jordan Fontaine. A PT2399 based delay but it has a trick upon its sleeve that I haven't seen elsewere, the Slam switch. Schematic is avaiable HERE.
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 36 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 1 value the reader of this layout was not sure of
- R51 at column 20 rows E-H (next to Q3 and a 220nF): printed 'R51' with no value; possibly meant as 51R, entered as value not given
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 14 | ||||
| ×3 | 10K | 10k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×3 | 1K | 1k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×5 | 100K | 100k | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×2 | 22K | 22k | read from the layout by eye | |
| ×1 | 82K | 82k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 8.2K | 8.2k | read from the layout by eye | |
| ×1 | 18K | 18k | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| R51 | ? | ? | value not given; read from the layout by eye | |
| Capacitors 11 | ||||
| ×2 | 33pF | 33p | read from the layout by eye | |
| ×2 | 220pF | 220p | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×5 | 100nF | 100n | read from the layout by eye | |
| ×5 | 220nF | 220n | read from the layout by eye | |
| ×1 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 22uF | 22u | electrolytic; read from the layout by eye | |
| ×4 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 1 | ||||
| ×3 | 2N3819 | 2N3819 | JFET; Q1-Q3; legend: Try 2n5458 - always double check pinouts; read from the layout by eye | |
| ICs 2 | ||||
| ×1 | 78L05 | 78L05 | regulator; read from the layout by eye | |
| ×1 | PT2399 | PT2399 | read from the layout by eye | |
| Potentiometers 4 | ||||
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Delay | B50K | B50k | Potentiometer | read from the layout by eye |
| Repeat | B50K | B50k | Potentiometer | read from the layout by eye |
| Mix | B50K | B50k | Potentiometer | read from the layout by eye |
| Trimmers 2 | ||||
| ×2 | 10K | 10k | Q1 3.4v and Q2 5.6v bias; read from the layout by eye | |
| ×1 | 25K | 25k | Q3 3.4v bias; read from the layout by eye | |
| Switches 1 | ||||
| Slam | DPDT momentary | DPDT MOMENTARY | footswitch, normally open; read from the layout by eye | |