125B · 4 knobs
Guyatone PS-021 Guitar Exciter / Compressor
Based on the Guyatone PS-021 Guitar Exciter & Compressor· 2 other boards clone it
- Category
- Compressor
- Difficulty
- Difficult
- Build
- Vero· 30×22· 54 cuts, 28 links
- Layout
- Unverified · no build reported at Tagboard Effects yet
- Tags
- Compressor, Exciter, Guyatone, PS-021
From the post
A vintage pedal from the 80s.
I've removed the flip flop switching system and buffers (thanks Zach for the help).
Hopefully it will fit in a 125B box.
You can find original thread and schematic here.
Updated schematic is available in our Forum section.
Thanks Dino for his explanatory video.
12/11 Layout Updated! Readded the input buffer as Aion's suggested.
... and the LM13700 version
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 Tagboard Effects. 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 · 2 values the reader of this layout was not sure of
- 500p/200p-style small text throughout: image is only 1136 px wide for a 30-column board, so counts of 10K (15) and 1M (6) were tallied twice from zoomed tiles but are the likeliest place for a miscount
- 220n at column 6, rows N-P area (left-middle): reads 220n at high zoom, looks like 22n at normal size
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| ×15 | 10K | 10k | read from the layout by eye | |
| ×4 | 33K | 33k | read from the layout by eye | |
| ×6 | 1M | 1M | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×2 | 150K | 150k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 100R | 100 | read from the layout by eye | |
| ×1 | 39K | 39k | read from the layout by eye | |
| ×1 | 4K7 | 4.7k | read from the layout by eye | |
| ×1 | 5K6 | 5.6k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 560K | 560k | read from the layout by eye | |
| ×1 | 15K | 15k | read from the layout by eye | |
| Capacitors 10 | ||||
| ×2 | 22n | 22n | read from the layout by eye | |
| ×2 | 33n | 33n | read from the layout by eye | |
| ×1 | 2n2 | 2.2n | read from the layout by eye | |
| ×1 | 1n | 1n | read from the layout by eye | |
| ×1 | 220n | 220n | read from the layout by eye | |
| ×5 | 10n | 10n | 3 ceramic, 2 film; read from the layout by eye | |
| ×4 | 1u | 1u | electrolytic; read from the layout by eye | |
| ×1 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×2 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| D1 | 1N914 | 1N914 | read from the layout by eye | |
| D2 | 1N914 | 1N914 | read from the layout by eye | |
| Transistors 1 | ||||
| ×6 | 2N5088 | 2N5088 | NPN Si (2n5088,..); read from the layout by eye | |
| ICs 3 | ||||
| ×1 | 4558 | 4558 | read from the layout by eye | |
| ×1 | LM324 | LM324 | read from the layout by eye | |
| ×1 | 3080 | 3080 | OTA; read from the layout by eye | |
| Potentiometers 4 | ||||
| Exciter | B20K | B20k | Potentiometer | read from the layout by eye |
| Sustain | B1M | B1M | Potentiometer | read from the layout by eye |
| Color | B100K | B100k | Potentiometer | read from the layout by eye |
| Level | A50K | A50k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 22K | 22k | read from the layout by eye | |
Other boards based on the Guyatone PS-021 Guitar Exciter & Compressor
- Meridian Aion FX · 125B · $12.50
- Guyatone PS-021 Guitar Exciter & Compressor Dirtbox Layouts