Re: Revox A700 flutter only at 7.5ips?
Do you have a scope? If you do, then scope the pick up and see if you can see any flutter on the scope.
If you can, then pull each of the audio boards in turn, starting with the oscillator and record boards (whilst playing a known good tape) and see if the flutter disappears. If it does you've located the area of the fault.
The reason for my suggestion is that all three speed lines go to these boards for equalisation and switching.
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