Enclosure not stated · 1 knob
70 Funk BoxVerified
Based on the 70 Funk Box
- Category
- EQ / Filter
- Controls
- Range
- Build
- Vero· 15×10· 7 cuts, 4 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Filter, Wah
From the post
Maybe i'll just post a few today...
This i found as a scan from some ye oldee electronics magazine. I have no idea what it does, but text from the article made me draw it :)
Excerpt from the article:
Fuzz, echo, reverb, big bass, they're all out! The new guitar sound is funky, and you'll get that with the wide range funk box. Just crank potentiometer R7 (range) and you'll get an extra twang from way down low to way up high.
Adjustment is easy, simply vary potentiometer R4 (trimmer) until you hear a whistle (oscillation); then back off R4 until the oscillation just ceases.
Attention! Madferret verified this and he noted that it is a reasonable wah with range pot acting as a wah pot. And you shouldn't use your girlfried as a knob turner in the long run.
Also. It may be a good idea to wire a 10K lin pot external instead of the trimmer.
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 11 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 4 | ||||
| ×1 | 470K | 470k | read from the layout by eye | |
| ×2 | 22K | 22k | read from the layout by eye | |
| ×3 | 56K | 56k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 4 | ||||
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×1 | 56nF | 56n | read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| Transistors 1 | ||||
| ×1 | 2N3904 | 2N3904 | legend: used to be HEP-722 or HEP-723, try any NPN, like 2N3904; read from the layout by eye | |
| Potentiometers 1 | ||||
| Range | B10K | B10k | Potentiometer | lug 3 unconnected; read from the layout by eye |
| Trimmers 1 | ||||
| VR1 | 2K | 2k | use trimpot to get near oscillation; read from the layout by eye | |