Amadeal VM25L Uneven Motor Brush Wear

[noel shelleyParticipant @noelshelley55608]

Richard where abouts are you ? Noel.

[MacolmParticipant @macolm]

For such circumstances I keep an old security light with high wattage mains halogen lamps, for example 1000 watt. With the mains supplied to the circuit under test via this, a dead short merely makes the lamp shine at full brightness. Something like a electric drill motor running on light load will scarcely light it, and the voltage dropped will be small. From cold to full brightness, the resistance of a halogen lamp increases by more than ten times, so a cold 1000 watt lamp might be perhaps 5 ohms. Lamps could be connected in parallel, and will share the current well due to the rapid resistance rise with current.

Unfortunately such lamps are no longer available to purchase new, but almost certainly available second hand.

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