Enclosure not stated · 2 knobs
Box of Hall Reverb - culturejamVerified
Based on the CultureJam Box of Hall· 3 other boards clone it
From the post
A nice little Belton Brick reverb build here. As described by cj:
This one is pretty simple. It's the new smaller Belton/Accutronics brick and a quad op amp, a Reverb Mix control and a tone control I'm calling "Dampen". It's a dead-simple low-pass filter right off the brick's output (or rather, one of the outputs) in parallel with a fixed cap to ground. I got that little idea from earthones' suggestion of a tone control for the 2399 reverb I did. (credit where due!) I'd say this is about 75% similar to the application note, but with the added tone control, slightly different filtering, and buffered VREF.
I've tried this with the Medium and Long decay bricks. The Long can definitely get some cool ambient spacy sounds going on. And with the tone control at min, it's really bright (either brick type). The only difference I can hear is the decay time.
Circuit is verified and sounds pretty damn good.
Demo by Geiri:
You can get the Belton bricks from Musikding here. I'd suggest going for the BTDR-2H because it's smaller, but have included a layout for the older BTDR-1H bricks as well, just in case someone has one they want to use.
Layout for BTDR-2H bricks:
and one for the older BTDR-1H bricks:
It seems to be very popular so here's the Box of Hall - Heavenwithin modded version.
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 18 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 5 | ||||
| ×6 | 10K | 10k | read from the layout by eye | |
| ×3 | 33K | 33k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 2M2 | 2.2M | read from the layout by eye | |
| Capacitors 8 | ||||
| ×1 | 470p | 470p | read from the layout by eye | |
| ×1 | 4n7 | 4.7n | read from the layout by eye | |
| ×1 | 22n | 22n | read from the layout by eye | |
| ×1 | 33n | 33n | read from the layout by eye | |
| ×1 | 100n | 100n | read from the layout by eye | |
| ×1 | 1u | 1u | read from the layout by eye | |
| ×1 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×2 | 100u | 100u | electrolytic; one drawn as an axial box; read from the layout by eye | |
| ICs 2 | ||||
| ×1 | TL074 | TL074 | read from the layout by eye | |
| ×1 | 78L05 | 78L05 | regulator; read from the layout by eye | |
| Potentiometers 2 | ||||
| Damp | B10K | B10k | Potentiometer | read from the layout by eye |
| Reverb | B25K | B25k | Potentiometer | read from the layout by eye |
| Other 1 | ||||
| BLT | Belton BTDR-2H | BELTON BTDR-2H | reverb module, off board (short, medium or long); read from the layout by eye | |
Other boards based on the CultureJam Box of Hall
- Box of Hall Dirtbox Layouts
- CultureJam Box of Hall Effects Layouts (blog)
- The Verb - Box of Hall Reverb Fuzz Dog · 1590B · £26.40