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Yes, but which Vishay and what flavor do you want?

24.6.90.25

In Reply to: RE: Do Vishay resistors have a "sound" ? posted by hukkfinn on February 07, 2010 at 10:16:45

The words "Vishay Resistor" used to mean the exotic bulk foil resistors....and much of the comments below are about that. But in the last many years Vishay has bought tons of companies and they have tons of resistors that people now call "Vishay". Dale resistors are now "Vishay" resistors to some. I call them Dales. If you have a metal film "Vishay" you do not have the original bulk foil resistor everyone is talking about below. Your description is too vague to really know what you have. Check out the Vishay site and see all the varieties of "metal film Vishay" resistors there are.

Bulk foil Vishays can sound more lean then some other resistors.....even though they are supremely transparent (especially the latest nudies...and of course you must damp them....or they ring). They will not match the tonal character of everything and just like all parts must be choosen to work with the circuit and your system to make synergy.

If you can, please find out EXACTLY what "Vishay metal Film" resistor you have....it would be fun to know.

The "sound" of a resistor is added to the circuit whether it is in series or in shunt......you will always hear its color. So, if you do not like the color you are hearing then by all means change it. You create your reality....you create your sound. Have fun.

Follow Ups:

"you must damp them....or they ring" - hukkfinn 23:15:20 02/11/10 (0)
How do I do this?

Thanks very much,
Hukk
Pics attached... they say "47K0 FC" on one side, "VSH1 9643" on the other. - hukkfinn 06:49:02 02/10/10 (5)
Sorry for poor pic quality. Best I could do.

Actually they have different numbers. One is VSH1 9643 and the other is VSH1 9117. Surprising because I think they are left and right channel.

Hukk
- No wonder.....VSH are bad sounding. - Ric Schultz 13:57:34 02/16/10 (1)
  You got the only Vishay bulk foil resistor that sounds like crap. Tried them from Percy Audio years ago and they are grainy/bright...bad. The ceramic coating kills the good sound. Also you never want to hang a component in the air on two solid core leads.....it rings. Put a small piece of contrained layer damping material from the resistor body to some other surface. You could use a tiny bit of amazing Goop from the resistor to another surface as well.
  
  Get rid of em!!!!
  - Is damping material necessary if I just mount them flush to the board? - hukkfinn 11:12:38 02/18/10 (0)
    Thanks for your helpful thoughts.
    Hukk
- See the linked pdf file for explanation of numbers. - Al Sekela 16:16:06 02/10/10 (2)
  The resistors are 47K ohm bulk metal foil types with different date codes. Your poor sonic results may be due to the poor installation technique: the resistors should NOT be mounted way up in the air on their leads, the way your photo shows. This invites noise induction and makes the circuit susceptible to acoustic vibration.
  - Vishay VSH datasheet. (Open in New Window)
  - Wow....thank you! - hukkfinn 16:41:37 02/10/10 (1)
    What would be the correct way to install them?
    
    That's really good to know. Thank you.
    
    Hukk
    - Leads should be dressed to be as short as possible. - Al Sekela 15:13:11 02/11/10 (0)
      Be careful not to create a short to the soldered termination of the cable, which appears to be close to the resistor in your photo.
      
      To fix this you will need a small soldering iron and some solder-wick. I would use a little liquid solder flux to minimize the time you have to apply the soldering iron to the joint to get it to melt, and to assist the wick to remove as much of the old solder as possible. Overheating the joint could damage the resistor and the metal of the printed circuit. Clean off the solidified remaining flux after you are done with the repair: it is resin and not harmful, but looks bad.
      
      Better to have help from someone with experience if you are unsure about this.

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