rogue inherent instability?

The Moog Forum Moog Music General Topics Forum
1

hi,

further to my problems with the MG-1, here are my rogue issues.

I have a Rogue which is misbehaving quite extensively. Sometimes it’s ok - but the two most common problems are:

  • losing tuning stability generally, requiring retuning - usually to flatten it, then some time later it will go back to the sharper tuning

  • being TOTALLY wrong - i.e., you’ll press A to tune it - and it won’t under any circumstances play an A

The tuning wheel will produce something like B > > G but not A!

incredibly frustrating.

Thanks!

davo

p.s. does anyone know how to reverse the note priority on the Rogue? I play the rogue and the MG-1 and the fact that their note priorities are different is maddening.

2

Sounds like a power supply problem. If one of the rails isn’t regulated the tuning will get funky because the control voltage is dependent on the power rails.

3

I´ve had a similar problem. After releasing a key in bypass mode the pitch started to rise very slowly to a point beyond the audio band! The power supply board is linked to the main board with a bunch of soldered wires that get a lot of stress when you move the boards around. Resoldering the joints cured this problem.

4

great, thanks guys! i’ll check the soldered joints and hope that that works.

does anyone have a definitive call on the exact power supply needs?

i know the manual says 24V AC, 6 watts - but what ampage does this amount to?

thanks,

davo

5

Well, the manual says 24VAC but in the stock wallwart it says 20. 20VAC is high enough for the ripple to stay above 12V anyway. And it´s rated 0,5A, which is the maximum current the 78M12/79M12 outputs. To check the regulators I put the DMM probes across C39 and C40 pins. They usually read 12V +/- 0,5V.