Enclosure not stated · 3 knobs
Jen HF ModulatorVerified
Based on the Jen HF Modulator· 5 other boards clone it
- Category
- Vibrato / Chorus
- Build
- Perfboard
- Layout
- Verified · Effects Layouts (blog) marks it as built and working
- Tags
- Jen, Modulator
From the post
Jen was an Italian electronics company that produced a lot of OEM stuff for other companies (Vox, Gretsch, etc.) as well as marketing their own line of effects. For instance, the HF Modulator was the same effect as the Gretsch Playboy.
This effect is a ring modulator and sounds fantastic with a fuzz pushing it. The original unit used 2N5172 transistors (which have BCE pinout), but I've laid this out for more common 2N3904 or 2N5088 transistors (that have CBE pinout). I've also added pulldown resistors, polarity protection, and power filtering.
Here's the schematic if anyone needs it. Most of the ones online have the tone section wrong.
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 Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 25 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 11 | ||||
| ×2 | 220K | 220k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×2 | 33K | 33k | read from the layout by eye | |
| ×1 | 560K | 560k | read from the layout by eye | |
| ×1 | 12K | 12k | read from the layout by eye | |
| ×1 | 18K | 18k | read from the layout by eye | |
| ×1 | 2.2M | 2.2M | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 1.2K | 1.2k | read from the layout by eye | |
| Capacitors 7 | ||||
| ×3 | 220nF | 220n | read from the layout by eye | |
| ×3 | 47nF | 47n | read from the layout by eye | |
| ×2 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 3.3nF | 3.3n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 220uF | 220u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N3904 | 2N3904 | legend: 2N3904, 2N 5088, etc; read from the layout by eye | |
| Q2 | 2N3904 | 2N3904 | legend: 2N3904, 2N 5088, etc; read from the layout by eye | |
| Q3 | 2N3904 | 2N3904 | legend: 2N3904, 2N 5088, etc; read from the layout by eye | |
| Potentiometers 3 | ||||
| Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| Speed | A100K | A100k | Potentiometer | read from the layout by eye |
| Intensity | B100K | B100k | Potentiometer | read from the layout by eye |
Other boards based on the Jen HF Modulator
- Jen HF Modulator Dirtbox Layouts
- Jen HF Modulator Experimentalists Anonymous
- HF Modulator Fuzz Dog · 1590B · £27.60
- Superfreq Moonn Electronics · €4.50
- Jen HF Modulator / Gretsch Playboy Tagboard Effects