I do own a Raven AC 2 since 2007. Did six modifications on it so far. Can't imagine to hear it in it's stock state again.
I use the battery driven motor controller as well. But i can't say whether it has speed stability or not - because i can't set up the right speed at all.
As measuring tools there a stroboscope disc with 300 Hz flash and a Timeline. Viewing the stroboscope disc for detecting the rotational behavior of the platter is like watching the clouds. For me, the Timeline is the way to go. And what is this device revealing on the Raven? Maybe you could hit the 33,3 speed mark, pushing the up and down buttons of the controller, when using the stock belt. Given a specific belt tension, too.
I'm using string or tape - for the reason of better performance. Doing so it is not possible to set up the right speed (33,3 or 45). The Timeline shows this fact undeniable: the platter always rotates to fast or to slow. The Laser never stands still on the wall. Pushing the buttons does not help. Why?
Its because of the regulation build in the motor controller. It works with incremental steps of speed regulation. Tiny steps, but STEPS. If you need a value between two possible steps for perfect speed adjustment, and this is the case with string or tape that have different diameters, - you are lost with this kind of construction.
So the Laser is wandering on the wall - i'm not able to say if it does it with regular speed.
For future improvements (or turntables) i never would accept such as a drive management again. Only a ANALOGUE solution with a classic potentiometer providing all values necessary.
I think this issue is basic. Not only to the Raven.
I use the battery driven motor controller as well. But i can't say whether it has speed stability or not - because i can't set up the right speed at all.
As measuring tools there a stroboscope disc with 300 Hz flash and a Timeline. Viewing the stroboscope disc for detecting the rotational behavior of the platter is like watching the clouds. For me, the Timeline is the way to go. And what is this device revealing on the Raven? Maybe you could hit the 33,3 speed mark, pushing the up and down buttons of the controller, when using the stock belt. Given a specific belt tension, too.
I'm using string or tape - for the reason of better performance. Doing so it is not possible to set up the right speed (33,3 or 45). The Timeline shows this fact undeniable: the platter always rotates to fast or to slow. The Laser never stands still on the wall. Pushing the buttons does not help. Why?
Its because of the regulation build in the motor controller. It works with incremental steps of speed regulation. Tiny steps, but STEPS. If you need a value between two possible steps for perfect speed adjustment, and this is the case with string or tape that have different diameters, - you are lost with this kind of construction.
So the Laser is wandering on the wall - i'm not able to say if it does it with regular speed.
For future improvements (or turntables) i never would accept such as a drive management again. Only a ANALOGUE solution with a classic potentiometer providing all values necessary.
I think this issue is basic. Not only to the Raven.