Enclosure not stated · 1 knob
Hornby Skewes T.B. 2 SelectatoneVerified
Based on the Hornby Skewes T.B. 2 Selectatone· 2 other boards clone it
From the post
Another classic. Not much info on this one either. It's super rare, just like 99% of the Hornby Skewes pedals. Essentially, it's a set booster that you can switch between either bass or treble boost. Rumor has it that it was used by Ritchie Blackmore during the 1960s up until 1974, as well as Jethro Tull on Aqua Lung. Schematic is over at FSB.
Layout 1: Original (PNP)
Layout 2: NPN
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 9 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 4 | ||||
| ×3 | 10k | 10k | read from the layout by eye | |
| ×2 | 100k | 100k | read from the layout by eye | |
| ×1 | 1k | 1k | read from the layout by eye | |
| ×1 | 2.2k | 2.2k | read from the layout by eye | |
| Capacitors 3 | ||||
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Transistors 1 | ||||
| Q1 | OC71 | OC71 | PNP Ge; read from the layout by eye | |
| Switches 1 | ||||
| SW | DPDT on/on | DPDT ON/ON | read from the layout by eye | |
Other boards based on the Hornby Skewes T.B. 2 Selectatone
- Hornby & Skewes Selectatone T.B.2 Dirtbox Layouts
- Hornby Skewes Selectatone T.B.2 Revolution Deux