Tech Square

RE: Help with capacitor value.

86.131.102.176

clifff

In Reply to: RE: Help with capacitor value. posted by stakkall on August 02, 2008 at 09:39:07

Well, ohmite devils are definitely resistors (Google it), but with a 100V rating (unusual for resistors) and 10% tol I would suggest it is a cap, therefore 0.47uF

If you are planning to swap it, why not unsolder one end and measure it?

Follow Ups:

RE: Help with capacitor value. - stakkall 15:53:50 08/02/08 (3)
I misperceived the device lettering. This device actually does not state anything other than ".47 100V. EM." Your most likely accurate in that it is a capacitor. I don't understand the value of the other side portion of the amp where a tech replaced another ".47 100V EM" device with two Illinois Capacitor (IC) MWR .22k 630 devices. How does one translate the .22k as a capacitor value, as opposed to uF?
Thank you,
SomuT
- That's a gotcha! - clifff 09:39:56 08/03/08 (2)
  In that case the "k" is tolerance, (20% ? I can't remember)
  
  So he put two .22uF in parallel to give .44uF, well within the loose tolerence of the components.
  
  He used 630v devices because that is all he had. Probably.
  - RE: That's a gotcha! - stakkall 17:44:12 08/03/08 (1)
    If I had enough know-how I would have replaced/updated all four capacitors of the ".47 100V EM" type, rather than introduce the piggy-backed .44uF deviant. What can I say: I'm an English major. Thanks Cliff.
    Thank you,
    SomuT
    - So... do it! - GPBobby 05:01:08 10/22/08 (0)
      If you want to change them ALL now, you can do it. You didn't say whether the caps were on a printed circuit board or not, or what they do in the circuit.
      
      In theory, any cap with the same capacitance and voltage rating will work, but in reality, some cap constructions are better than others in a given application. So someone would have to give you a tip about that. Also, if you are not skilled at soldering and your parts are on a pcb, you might want to cut your teeth on some other project. Removing parts from circuit boards can be difficult and destructive.

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