J4D wrotehow are they shaped ? round ?
you can find equivalents.
yep, they're round and from Vishay:
J4D wrotejust go to katranji. dont specify the type. just the requirements :) the metal covered one on the right is sometimes used as a resistance heater ! so heat is not a problem with it.
besides, all these are wirewound ! Katranji should have them all ! iza ma 3endo 3 watt bikoon 3endo 4 watt .
just increase the wattage.
I know better than to go to Katranji without checking for the number on the website (not unless it's something quite common), because half the staff doesn't know about electronics. When I walk in, they directly call Hussam or Habbal to help me out. I talked to Hussam then, and he told me that the closest wire wound resistors which hold the values 220 and 330 ohms are rated at 5 W. Increasing the wattage doesn't mean much an a normal electronics board, but this is a medical application here. They're used to control the dynamic braking of the tank motor. Yes, the value of the resistance affects the circuit operation (also the fact that they're wire wound means their inductance affects the phase shift at high frequencies), but shouldn't the power rating affect it as well? What if something else goes wrong and more electric current surges into them, they would take it (seeing that they can take the heat) but wouldn't the motor be affected then?
