+ Reply to Thread
Results 1 to 5 of 5

Thread: Are these good resistors for a power supply?

  1. #1
    Join Date: May 2008

    Location: U.S.A. Neo-Socialist Kalifornski

    Posts: 2,853

    Default Are these good resistors for a power supply?

    I was told wire wound resistors add smoothness ,then I read some wire wounds can be noisy at high voltage?

    Are these any good?

    https://www.ebay.com/itm/47K-ohm-2-W...53.m2749.l2649


    https://www.ebay.com/itm/1K-Ohm-3-Wa...53.m2749.l2649
    Jeff :UBERTHREADKILLER

  2. #2
    Join Date: Nov 2014

    Location: Denbigh, N. Wales

    Posts: 101
    I'm Mark.

    Default

    Depends if the voltage rating and power rating are enough for your power supply.
    ps. A 2W resistor will get very hot if it's used at more than 1W, and may not last long.
    Metal films are usually the problem ones for voltage rating if we're talking about 200V and above.

  3. #3
    Join Date: Sep 2013

    Location: North Island New Zealand

    Posts: 1,450
    I'm Chris.

    Default

    Quote Originally Posted by goraman View Post
    I was told wire wound resistors add smoothness ,then I read some wire wounds can be noisy at high voltage?

    Are these any good?

    https://www.ebay.com/itm/47K-ohm-2-W...53.m2749.l2649


    https://www.ebay.com/itm/1K-Ohm-3-Wa...53.m2749.l2649
    Wire Wound Resistors as well as exhibiting resistance, also have properties as inductors, which in turn can induce magnetic fields- possibly in the wrong locations.
    If implementing a resistor in a circuit, have a good idea of the circuits schematic and the additional effect of that resistance.

  4. #4
    Join Date: May 2008

    Location: U.S.A. Neo-Socialist Kalifornski

    Posts: 2,853

    Default

    The amount of inductance from a wire wound resistor is so minimal it shouldn't matter.
    I did find out how ever that the 100k resisters are magnetic wire wounds and that is a no no under high current .So they will go in the stuff I will most likley never use box.
    Jeff :UBERTHREADKILLER

  5. #5
    Join Date: Jan 2009

    Location: Essex

    Posts: 21,424
    I'm openingabottleofwine.

    Default

    Quote Originally Posted by goraman View Post
    The amount of inductance from a wire wound resistor is so minimal it shouldn't matter.
    I did find out how ever that the 100k resisters are magnetic wire wounds and that is a no no under high current .So they will go in the stuff I will most likley never use box.
    You might be interested in this: http://www.resistorguide.com/inductance/ .
    Barry

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •