Voyager (electric blue) Calibration. . . .

Tips and techniques for Minimoog Analog Synthesizers
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Voyager (electric blue) Calibration. . . .

Post by praxisaxis » Sun Aug 25, 2019 11:34 pm

Hi All,
I recall that a process for this was on a Gearslutz page. Gearslutz is down right now for some reason, and I'm impatient. Does anyone have a pdf of this or something? I'm not too bad with electronics but haven't done this calibration before so I'd prefer to find as many details as possible. I live in Australia so there is zilch chance of sending it away to get done.

Any help is appreciated.

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Re: Voyager (electric blue) Calibration. . . .

Post by till » Mon Aug 26, 2019 3:53 am

Gearslutz is running fine here right now.
keep on turning these Moog knobs

Prodigy * Minimoog (1979) * Voyager * MF102 * MF103 * MF104z * MP201 * Taurus 3 * Minitaur * Sub Phatty * MF105 * Minimoog reissues with MUSEs * One

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Re: Voyager (electric blue) Calibration. . . .

Post by Markyboard » Mon Aug 26, 2019 5:40 pm

I believe this is what was posted on GS:

Amos at Moog once posted this: Osc 1 tuning & scaling info Here is the info you should need in order to adjust the tuning of oscillator 1 on your Voyager "First you will need something with which to prop up the chassis so that you can open the back panel while you work. I recommend a stack of books or similar, about 3” thick. Raise the panel to its full upright position and slide your prop under the back so that the panel will rest in a vertical position. Now you can remove the five screws from across the back panel and open the synth. I have attached a diagram which has the relevant adjustment points highlighted in a lovely shade of blue. There are two multi-turn trimmers (RT1 and RT2), which are tall and boxy with a brass turnscrew at the top, and there is one single-turn trimmer (RP9) which is a squat boxy item with a recessed plastic turning adjustment. The latter, RP9, is the adjustment for the keyboard tracking of oscillator 1. This is the first thing to adjust. Here is how to set up the Voyager for proper tuning: Go to the Edit menu and select “Init. Defaults,” press Enter, cursor to Yes and press Enter. This will set all of the oscillators to (what should be) unison tuning, all set to Squarewave. By default only oscillator 1 will be turned on. Next, go back to the Edit menu and select “Pitch Bent amount” – set the pitch bend to Off. This ensures that pitch bend does not inadvertently affect your tuning. Go to the Mixer section of the control panel and switch off Oscillator 1, and switch on oscillator 2. Do not adjust the oscillator 2 or 3 “fine tune” controls; leave them be so that your tuning is not thrown off by accident. Hook up your synth to a tuner and use only the master Fine Tune control (lower left of the control panel next to the Glide rate knob) to adjust the master tuning until oscillator 2 is in proper tune. We tune to the low “E” on the keyboard, and then test the keyboard scaling by playing the “E” two octaves up on the keyboard. Generally if this interval is set correctly, then there is very little error across the rest of the keyboard. So, once you have determined that oscillators 2 and 3 are properly tuned, set the switches in the mixer section so that oscillators 2 and 3 are both turned off and only oscillator 1 is on. Play the low “E” and check the tuner; is Oscillator 1 in tune? Also, you could turn on oscillator 2 and listen for beating between the oscillators. If Oscillator 1 is not in tune at low E, then we need to make a few adjustments before setting the keyboard scaling. First, adjust the multi-turn trimmer RT2 until oscillator 1 is bang-on pitch at low E. it can help to set the Gate switch on the control panel to On/Ext. so that the note will continue to play while you make adjustments. Next, set the Oscillator 1 Octave switch on the panel to 2’. Play the same low E key on the keyboard and check the tuning. If it is not in tune (should be E5, I think), adjust the multi-turn trimmer RT1 until oscillator 1 is exactly in tune at the 2’ octave setting. Now switch back to 8’ on oscillator 1 and play the low E key and adjust RT2 if necessary to tune in E3 on your tuner. You may need to go back and forth a time or two between the above steps; when you are finished you should have an oscillator that is in tune at all of the octave settings when playing the same low E key. A note: if the tuning is OK on all lower octaves

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Re: Voyager (electric blue) Calibration. . . .

Post by hieronymous » Mon Aug 26, 2019 6:21 pm

Wow, first the gearsz forum wasn't working, then the Moog forum wasn't working! What did you do?!! :lol:

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