1590A · 1 knob
Run Off Groove May QueenVerified
Based on the Run Off Groove May Queen· 2 other boards clone it
From the post
Here's another "Brian May in a box" circuits, this time from Run Off Groove. The May Queen is a treble booster/overdrive that should get you pretty close to those classic Queen tones. The cap between 9v and the drain of Q3 in the layout below is optional. It's a high end filter, so the larger the values will cut more treble frequencies (2.2n is just a good starting point–adjust to taste). I've added polarity protection, power filtering, and a pull down resistor at the input. You might be able to cram it into a 1590a. For the schematic, transistor voltages, and sound samples, check out RunOffGroove.com.
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 Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 20 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×2 | 10K | 10k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 150Ω | 150 | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| Capacitors 6 | ||||
| ×1 | 470pF | 470p | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q2 | 2N3904 | 2N3904 | read from the layout by eye | |
| Q3 | J201 | J201 | JFET; read from the layout by eye | |
| Potentiometers 1 | ||||
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 10K | 10k | read from the layout by eye | |
Other boards based on the Run Off Groove May Queen
- Runoffgroove May Queen Dirtbox Layouts
- May Queen Fuzz Dog · 1590B · £26.40