9 Port HOR Siro-Drone 120V Test + 240V Blast

[DJ2226]

Post about this siren: viewtopic.php?t=30784

Here is the video I took of this siren running. The first part of the video is of the siren running on 120V. It only gets up to half speed which isn't quite fast enough to disengage the brushes to let the siren run on the windings only. Once it was fed 240V, it was able to reach a speed that was fast enough for the switch to kick in and drop the brushes to let the motor run on just the windings. It runs like a repulsion/brushed motor siren until it transitions to run mode with a logarithmic wind-up. Once it switches over, it linearly continues the wind-up until it peaks like any other typical induction motor-driven siren. The switchover point is very reminiscent of what you'd typically hear on single-phase Sentry and ACA/ASC sirens since the repulsion portion of this motor effectively does the same thing that the capacitors, start windings, and centrifugal switch do on single-phase induction motors. Very unique windup on this thing



https://www.youtube.com/watch?v=juQIHVQBB7M