The 2352 from auber has a 2 second cycle time minimum. At boil, with 11 gallons, I'm typically at 60-70% on, so 1.2-1.4 seconds on, 0.8 to 0.6 seconds off.
When the kettle has just started to boil, there is perceptible pulsing in the boil, (harder, than softer, than harder), that lines up with...