need 15 Ohms, 5 Watt Aluminium housed resistors. I want 25 pieces.
Aluminium housed 15 Ohms/ 5Watt resistors.
Newark, Allied, NTE etc are cut throats.
Any one has a clue, please?

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UK Farnell electronics
http://uk.farnell.com/welwyn/wh5-15r-ji/resistor-10w-5-15r/dp/9507779
Slightly higher power rating is OK, price is a minimum at 10W, not 5, these work out at ~1 GBP each.
What are you doing with them ?
Steve