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Help with capacitor value.

24.61.125.232

stakkall

Hi: I'm using an amp that has what looks like a capacitor. The brown gum drop oval shaped device states ".47 +/-10% 100V. EM." Can someone indicate what .47 indicates translates to, e.g. .47uF or .47K, so that I can go about upgrading it. On the other side of the amp in parallel, a tech replaced one of these failed brown devices with two "IC MWR .22k 630" capacitors. What does the .22k mean? Can I substitute the two .22k capacitors with a single .44k 630V cap?
Thanks for the help,
SomuT

Edits: 08/02/08

Follow Ups:

RE: Help with capacitor value. - clifff 12:22:00 08/02/08 (4)
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?
- 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)
        
        In Reply to: RE: That's a gotcha! posted by stakkall on August 03, 2008 at 17:44:12
        
        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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