[KenWittlief]

I think your instrumetation is off - the victors work by pulsing the 12V to the motors to contol the speed - when you are going slow it pulses it on briefly, at half speed the pulse is on half the time, and off half the time - and at full speed the victor outputs a solid 12V

but you need to have your scope set up so you can see the pulses - if the X axis (time base) is too fast you will only be seeing part of the pulse, maybe the 12V part, maybe the gnd part, or maybe some back emf from the motors.

try it with the motors disconnected, and look for the pulses - adjust your sweep rate until you can see 2 or 3 - then as you adjust the pwm commands to the victor you will see the pulses changing in width.

you might also need to play with the scope trigger - make sure its on the same channel as the probe, and make sure the trigger level is around 6 volts.

there is one other difference - the older victors have a wider dead band, so using closed loop feedback (PID loops) is thrown off a little by the 20 or 30 pwm values around 127 that output nothing.