In Reply to: Opinion on resistors posted by pepericoz on October 13, 2009 at 13:52:44:
you have covered the bases. Is your amp self or fixed bias? If self what is the Wattage of the cathode R? For wire wound you can't go wrong with Mills. Michael Percy sells some non-inductive wire wounds in typical extruded aluminum housings. In circuit I favor 1% precision wire wounds, precision carbon film, and the Vishay bulk foil esp. the S102. If you have a chance to see the inside of an Allen Organ Co. power amp you will instantly notice all the wire wounds inside. There was a reason behind this. USN spec at 100 Watts (or whatever) means the part if really rated for double that. Think stability and longevity. Just a hint. I like to use a higher value R than going by simple dissipation. Remember, a cooler R is a less noisy R. If a cathode R needs to be 10 or 20 Watts I'll use 50 or higher. In a pair of parallel 300B mono blocks I'm using a cathode R rated to 150 Watts. Another hint. Wire wound R use different metals for different applications. Copper Nickel is one blend. Nickel Chromium is another. I wonder which sounds better? Also, non-inductive wire wound R are probably a good idea. I have used both to good effect in a multitude of places. A friend loves tantalum R. Is this tantalum oxide or is it metal? Whatever it is he likes them. Oh, lest I forget, I have come to avoid metal oxides pretty much everywhere. I usually pass on the metal films as well. I love watching metal film R self destruct in their kind of miniature strange slow motion firework way. Have Fun. And, Happy Listening.
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Follow Ups
- Do a search on This, Tube, and SET just to make sure - elektron 10/13/0923:12:41 10/13/09 (2)
- I'd be careful about wholesale change to higher wattage rated resistors. - FenderLover 05:21:44 10/18/09 (0)
- Precision carbon comp? Please enlighten me. (nt) - LowRedMoon 09:09:09 10/17/09 (0)