Just playing a test tone record on a turntable with power off.
Subtle friction together with moment of inertia (flywheel effect, the analog of inductance) create a very smooth decrease in angular velocity that lasts for many seconds.
Set up:
NAB test record, track with a 1KHz tone - Stanton cartridge - Technics MKII turntable - Tealistic Disco mixer - Sennheiser HD 580
It is very interesting that while frequency is changing the VU Meyer needles on the disco Mexer stay constant. Is this a nice test for RIAA curve?
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