Can anybody tell me how to calibrate the oscillators on a Moog Prodigy? Neither the User’s Manual nor the Service Manual address this at all. (Though I admit that all of the Service Manuals which I found online start at section 2).
There are two holes for each oscillator on the back of the synth, adjustible with a screwdriver, each marked Scale and Range. There must be a standard procedure with this adjustment, but simply tweaking either of them seems to only alter the tuning across the keyboard.
I have found people asking the same question on many different sites, none of which were answered…
Cheers,
Roderick
have a look here:
http://www.till-kopper.de/prodigy/index.html
Brilliant, cheers!
–R
Bonjour.
Je suis intéressé par la réponse à la question de roderick_miller
En effet, le lien ne fonctionne plus dans la réponse de Qwavea
According to the Technical Information Sheet schematics of the Prodigy there are four trimmers responsible for oscillator behavior:
OSC 1 (OSC 2):
R1 (R22): Oscillator base frequency => “RANGE”
R7 (R28): Oscillator scale / octave spreading => “SCALE”
R14 (R35): Chip heater for expo array
R42 (R60): Hi End Trim
1.) Start with the SCALE adjustment until keys in octave distance create exact frequency doubling. The RANGE is unimportant in that step
2.) Adjust the RANGE until the a’ key creates exactly 440 Hz
3.) If the octave spreading does not fit after lets say 10 minutes change the chip heater value on the board
4.) Perhaps you must re-adjust Hi End Trim on the board after that procedure
Hope that helps
Try this links:
https://www.manualslib.com/manual/887038/Moog-Prodigy-336a.html?page=5#manual
https://www.manualslib.com/manual/887038/Moog-Prodigy-336a.html?page=6#manual
https://www.manualslib.com/manual/887038/Moog-Prodigy-336a.html?page=7#manual
These show the very same content.
Merci beaucoup. Concernant les résistances R1 (R22), R7 (R28), R14 (R35) et R42 (R60), s’agit-il bien des vis à l’arrière du clavier ?
They should be tagged on the main board.
Ok, merci !