has a double "scale" for checking wether it's turning at the right speed.
The scale is a bunch of small silvery dots, illuminated by some little orange lamp.
Here, where the lamp will flicker at 50 Hz, I will see a "steady still image" on one row when the table is turning at 45rpm. (Other rows for other speeds exist, this one doesn't have 78 rpm)
If I were to carry the thing to a 60 Hz area, I'd have to use the "other" strobo-lines to fine-tune the speed, but the actual frequency of the power lines won't affect the turntable much.
Of course, it being a turntable "almost" implies it's built with an internal transformer, made the traditional way: iron core, two solenoids, ready.
That type of transformer had minimal power loss, and indeed worked with "all" input voltages and frequencies, only transforming the voltages though. (Well, and the currents, as the total power should remain the same)
Modern equipment, though, is often built using "switched transformers".
PC equipment seems to have'em as well. |
