This reminds me of one of my favorite historical audio clips. A few minutes before the 1965 Blackout in NYC the power frequency dipped as low as 51Hz (US is 60H

This reminds me of one of my favorite historical audio clips. A few minutes before the 1965 Blackout in NYC the power frequency dipped as low as 51Hz (US is 60Hz). Playback equipment with motors setting speed based on the power frequency sllllooowwwweeeeddd down. https://www.musicradio77.com/images/ing11-9-65blackout.mp3 https://www.musicradio77.com/images/ing11-9-65blackout.mp3