One-O-Six Chorus

One-O-Six Chorus

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.

History :

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 :

background-noise-one-o-six

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.

 

 

 

 

 

 

Recent Posts

arduino Mega pin tester application

A short application to test your arduino mega and detect if there are very thin short or cold solder joints between the pins/connectors. Useful if your buttons are not detected for example (we had a defective board with a short between pin 10 and 11, disabling SRIO function scanning the buttons).

Simply upload the sketch and then with a single wire you can monitor through Serial at 115200 bauds that the pin is good : pin 13 is the output pin alternating a state 1/0 while Serial indicates if the tested pin is working. All pins are tested so you can pass from one pin to another with the monitor window opened without rebooting, simply by moving the wire.

pin10 is tested on the picture below :

 

Increase the delay(5) to delay(150) to see the source output pin blinking. Sketch to download :

testeur_Mega_one_wire_v2

 

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