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Gary Hurst Tonebender MKIVerified
Based on the Gary Hurst Tonebender MKI· 2 other boards clone it
From the post
Like the last one, a bit of a pain but the Gary Hurst version is slightly more forgiving I believe. Again don't forget to cut the trimmer legs that are shown over the -9V rail, there should be no connection there. This is based on the original Gary Hurst MkI because the reissue was in reality a MkII. Maybe Gary thought the MkI's are a pain as well! :o)
This one is verified
Updated 31st January 2014: A lot of people have mentioned that the trimmers in this aren't as important as finding the correct transistors, so I'd recommend building this version which omits the trimmers entirely and puts the fixed resistors back.
Make sure you use sockets for the transistors and prepare yourself to audition plenty! :o)
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 17 rows
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Check before you build · 1 value the reader of this layout was not sure of
- The two 10K parts beside Q1 and Q3 (top of board): drawn as translucent boxes with one leg cut / not soldered, taken as trimmers; could be meant as another 10K part type
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×1 | 15K | 15k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×2 | 2K2 | 2.2k | read from the layout by eye | |
| ×1 | 56K | 56k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 2M2 | 2.2M | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| Capacitors 3 | ||||
| ×1 | 10n | 10n | read from the layout by eye | |
| ×1 | 100n | 100n | read from the layout by eye | |
| ×2 | 25u | 25u | electrolytic; read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | PNP germanium | PNP GERMANIUM | type not given; read from the layout by eye | |
| Q2 | PNP germanium | PNP GERMANIUM | type not given; read from the layout by eye | |
| Q3 | PNP germanium | PNP GERMANIUM | type not given; read from the layout by eye | |
| Potentiometers 2 | ||||
| Attack | 50K | 50k | Potentiometer | read from the layout by eye |
| Level | 500K | 500k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×2 | 10K | 10k | beside Q1 and Q3; one leg cut, not soldered; read from the layout by eye | |
Other boards based on the Gary Hurst Tonebender MKI
- Gary Hurst Tone Bender MKI Revolution Deux
- Tonebender MKI Tagboard Effects