Enclosure not stated · 2 knobs
Blackhawk Amplifiers Valhalla Fuzz V1Verified
Based on the Blackhawk Amplifiers Valhalla Fuzz V1
From the post
Here we have a layout for the first (I think!) handwired version of Blackhawks take on a Fuzz Face. But it has a few interesting and useful extra things going on. First, a passive pickup simulator so you can have a buffer upfront or anywhere in the signal chain. Next comes the fuzz circuit itself which are closely related to a Meathead but with larger input and electrolytic "gain" caps. Next there is two quite large value output caps that are connected to the Bass Boost switch. At the end of the circuit there is a simple but very effective notch filter that gives a wide array of tones, from rumbling bass, scooped mids and sizzly high mids.. The notch filter Tone control can be bypassed with the tone bypass switch and will give a big volume boost with a thick grinding middy fuzz. Note that the Bass Boost switch only works when the notch filter is engaged. Also note that I couldn't read the marking on C9 but I'm pretty confident that the value is 220nF. C9 is now confirmed, 220nF it is
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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 21 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
- 500pF ceramic at column 2, rows K-L: printed clearly, unusual value
- Bass Boost switch: wire labels say Bass Boost, legend says Mid Boost; taken as one switch
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 820Ω | 820 | read from the layout by eye | |
| ×1 | 18K | 18k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 120K | 120k | read from the layout by eye | |
| Capacitors 7 | ||||
| ×3 | 220nF | 220n | read from the layout by eye | |
| ×1 | 500pF | 500p | read from the layout by eye | |
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×1 | 3.3uF | 3.3u | electrolytic; read from the layout by eye | |
| ×1 | 33uF | 33u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| C9 | ? | ? | value not given; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N3904 | 2N3904 | read from the layout by eye | |
| Q2 | BC109C | BC109C | read from the layout by eye | |
| Transformers 1 | ||||
| TR1 | 42TL019 | 42TL019 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Tone | B2K | B2k | Potentiometer | read from the layout by eye |
| Volume | B100K | B100k | Potentiometer | read from the layout by eye |
| Switches 2 | ||||
| Bass Boost | SPDT on/on | SPDT ON/ON | toggle; legend calls it Mid Boost; read from the layout by eye | |
| Tone Bypass | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |