> On Nov 6, 2024, at 8:05 AM, Mike Stein via cctalk <cctalk@classiccmp.org> > wrote: > > I use a strobe disk glued to a fridge magnet that I stick on the spindle > motor of 5 1/4" drives to confirm the speed; the trouble is that it's > becoming difficult these days to find lamps that emit light at 60 Hz. ;-)
Turns out there are strobe light tachometer apps for smart phones that can be at least as useful as a lamp. I was able to use one to set the spindle speed of an Atari 1050 (288 RPM), despite the tach disc being for a 300 RPM drive, by setting the strobe frequency to 57.6 Hz. ok bear.
