Enclosure not stated · 1 knob
Hornby Skewes Treble BoosterVerified
Based on the Hornby Skewes Treble Booster· 1 other board clones it
From the post
Request.
The transistor may be difficult to get hold of but you can try other PNP silicons in its place. The datasheet suggests the hFE of the 2N4061's was 90 - 330, but check the pinouts of your replacements and insulate/twist the pins if necessary to match the layout.
The filter created by the 1n output cap and 100K resistor will cut a lot of bass (after all it is a treble booster), but consider socketing it so you can experiment to find the values that best suit your style and gear.
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 10 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
- 80u electrolytic in the middle of the board: printed clearly, unusual value
- 10K resistor right of the 62K: partly covered by the 80u cap, last letter clipped
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 5 | ||||
| ×1 | 62K | 62k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 3K9 | 3.9k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 100K | 100k | may be replaced by a volume pot (Blackmore mod); read from the layout by eye | |
| Capacitors 4 | ||||
| ×1 | 1n | 1n | read from the layout by eye | |
| ×1 | 22n | 22n | read from the layout by eye | |
| ×1 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×1 | 80u | 80u | electrolytic; read from the layout by eye | |
| Transistors 1 | ||||
| Q1 | 2N4061 | 2N4061 | PNP; try other PNP silicon, 90-330 hFE; read from the layout by eye | |
Other boards based on the Hornby Skewes Treble Booster
- Hornby Skewes Treble Booster Revolution Deux