The BEHRINGER FX600 and DR600 have almost 100% identical boards. These mods are just reclocking / circuitbending / them. This gives MUCH longer reverbs. At the cost of sound quality. But LONG!!!! :)
Here's a simple: How-to. As always - experiment at your own risk. This is definitely voiding warranty. Anyhow:
1. Remove crystal (big, metal component, two legs but casing soldered to ground = takes some time to desolder)
2. Build a 5V regulator from an LM7805 + 330nF, 100nF; connect this regulator in parallel to pedal 9V in. Yes, there is 5V in the Behringer pedal, but it wasn't designed for extra stuff and there's very little cooling. Best to play it safe.
INSTALL YOUR LTC1799 board (it's tiny and the board is a great help).
3.1 Connect signal OUT from LTC1799 board to top (desoldered) xtal connection on pedal.
3.2 Connect FREQUENCY JUMPER B to C on LTC1799 board.
3.3 Connect a POTENTIOMETER (and makes holes for it etc), I liked around 100-200Kohm
3.4 Connect LTC1799 GROUND to pedal board ground.
3.5 Connect OUTPUT of 7805 regulator (with capacitors) to +5V on LTC1799 board.
Done!
Sorry for the jumpy camera, just wanted to get closeups of most stuff. Scope shows variable clock frequency. Reverb times increase (at the expense of any "hifi") up to 30 seconds. I could get delay times around 5-6 s.
I also connected a 3.5 mm jack in parallel so I can control the clock frequency via Vactrol (like I do on the Krautrock phaser).
I got my LTC1799 boards from Circuitbenders:
www.etsy.com/s...
There's a lot more how to do it on their pages:
www.circuitben...
A big thanks to Jonathan Higgins for good advice and inspiration: • Variable Clock Speed M...
16 окт 2024
