mini ati hpss-16r
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the 3d model file set for my mini hpss-16r tornado siren.
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the recommended pole diameter is 5cm. high capacitance non-polarized capacitors will likely be needed to keep the oscillator switch from getting stuck in the middle. the caps will make the oscillator coast when it moves the switch, allowing it to move the switch all the way and reverse the rotation. they must be wired in parallel directly to the motor. tip 1: if the pole mount doesn't fit easily, sand the outside of the pole down with some rough grit sandpaper until the pole mount fits without getting stuck. tip 2: run the oscillator on 4 volts dc instead of 6 volts. 6 volts makes it turn a bit too fast.
below is a picture showing how to wire the oscillator switch.

gear motor for oscillator: https://www.ebay.com/itm/157729217519
screws for mounting the gear motor (select 3/16th inch): https://www.ebay.com/itm/202278899735
speakers (order 2): https://www.ebay.com/itm/194088323893
oscillation switch: https://www.ebay.com/itm/168396086669
oscillator coast capacitors: https://www.ebay.com/itm/405896403514
assembly screws: https://www.ebay.com/itm/252466154907