Strobe question


Maybe this is obvious, but I have a speed disk to put on my TT for use with the VPI SDS, but what light source do you use to check accuracy? Do I go to Radio Shack or someplace and get a strobe light? Are their choices?
sonicthedog
I think all you need to use is a standard 60Hz bulb. I use a portable work light similar to one that you use for car repairs. Just make sure it is 60Hz if you are in the USA, not he newer LED type.
I got mine in Home Depot...Its an AmerTac model 73068 night light. I plug it into an extension cord and am able to place it right over the VPI stob disc spinning on the turntable. Works great. I think it was about 5 dollars.
you need a "neon" lamp or maybe an old style flourescent. Small voltage test lamps (neon) should be only a small cost item. All lightbulbs are 60hz, or dc, operated with the proper voltage, but only the neon or an old style flourescent which causes the light to flash (you won't see the flashing) will cause the lines of the strobe to stand still. New style CFL don't use 60hz output to operate. I'm not sure about trying to use an automotive timing light because you have the need of a triggering voltage.
I use a cheap GE light stick, an under-counter flourescent fixture that's small enough to hand-hold. Cost me $10 (at most) from Home Depot.

I emphasize cheap because, as others have noted, the light must flicker with the mains frequency (60 Hz in the USA) or the strobe effect won't happen. Some costly fixtures include capacitors or other devices to reduce flicker. That makes for nicer lighting (some people CAN see 60 Hz flicker) but it also makes them useless for strobe testing.