A box based on Roland Juno Chorus circuit with Rate and Depth controls.
Use MN3009 or MN3007 and a DC-DC step up inverter to get genuine Rolandish tone.
It all started with this in 2011 : a Roland Juno Chorus board inside a 1U rack with a potentiometer to change the LFO rate + a dedicated dual power supply section + a Line level input stage.
The front panel and PCB we designed in April 2019 to fit a Hammond 1590XX enclosure :
Compare genuine Roland Juno Chorus to the Stereo One-O-Six Chorus :
Technical specs :
- Full analogue signal path !
- use genuine MN3009 or MN3007 PMOS BBDs
- true Stereo Chorus effect (180° phase rotation)
- Modulator LFO Rate/Depth controls
- LFO rate based on Juno 106 I & II position
- external source to replace LFO
- Direct Mute to use the One-O-Six as an AUX effect with a mixer
- 15dB range VU Meter
- Input level control for optimal signal
- Line level input : 0dBu
- Mono 1/4″ TS Jack input
- Line level Output : 0dBu
- Stereo 1/4″ TS Jack outputs
- S/N : 85dB
- genuine 3W DC/DC step-up inverter inside to achieve similar voltage of the Juno
- power : typically 9VDC 2.1mm barrel center negative (7-12VDC compatible, similar to stompbox )
- power consumption on 220V AC : 2.9 W (all LEDs lit and Roland PSU-1U)
- +15V rail : 190 mA
- -15V rail : 90mA
- weight : 0.410 Kg (no battery)
You can order your kit here
Assemble and solder your unit following this method.
Theory of operation regarding the chorus.