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G6Tanuki · 4th Nov 2018, 5:34 pm

Cunning!

In the past I've used a coil of galvanised-steel agricultural fencing-wire to make a 48VDC dummy-load; dunk it in a (plastic) bucket of water and it can dissipate a few hundred Watts for quite a long time (I ran it overnight and only a bit of the water boiled away).

Old car headlamp bulbs are also good - I get H4 (main/dip beam) bulbs with one dead filament for free from my local friendly garage. Wire a bunch of these in series/parallel and you can easily get to 500 Watts dissipation.

4th Nov 2018, 5:34 pm	#4
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 13,998	Re: Temporary load for power supply testing Cunning! In the past I've used a coil of galvanised-steel agricultural fencing-wire to make a 48VDC dummy-load; dunk it in a (plastic) bucket of water and it can dissipate a few hundred Watts for quite a long time (I ran it overnight and only a bit of the water boiled away). Old car headlamp bulbs are also good - I get H4 (main/dip beam) bulbs with one dead filament for free from my local friendly garage. Wire a bunch of these in series/parallel and you can easily get to 500 Watts dissipation.