morsefull Posted September 9, 2016 Share Posted September 9, 2016 My bulbs blown on my Ashdown ABM C115-500 evo combo (one of the early British made ones) Has anyone replaced it with an LED ? I fancy putting a blue one in but I'm not sure what would be compatible. I read something about having to use a resistor with an LED? Quote Link to comment Share on other sites More sharing options...
JapanAxe Posted September 9, 2016 Share Posted September 9, 2016 Quick and dirty calculation: You need to know the voltage that the original bulb worked at (call it 'V') and the current through the LED required to give a good strong output (call it 'I'). The resistance R that you need for the series resistor is found by R=V/I. That will get you in the ballpark. Quote Link to comment Share on other sites More sharing options...
morsefull Posted September 11, 2016 Author Share Posted September 11, 2016 Thanks JapanAxe 🙂 Has anyone tried this mod ? Just wondering what LED they used. Quote Link to comment Share on other sites More sharing options...
bigjimmyc Posted September 11, 2016 Share Posted September 11, 2016 Buy a replacement from Ashdown. The repair is surprisingly easy. I found the instructions via Google, not sure if they're on BC! Quote Link to comment Share on other sites More sharing options...
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