In Reply to: Coupling caps and resistor upgrades posted by mingles on April 9, 2008 at 15:34:03:
mingles, hi. As you have no doubt concluded these are sensitive areas. Let's consider C. My Mundorf experiences have varied widely. Excellent performance in speaker networks. Insufferable sound in RC coupling. I have been thinking of putting these Dorf's into the power supply just to stress the dialectric. Anyway, your milage will vary. I would strongly urge you to consider trying the RU K-40Y. I would try them where the PPMFX are now. In place of the Bennic I would go with Rel Cap TFT. Also consider the Solon Teflon film and tin foil. Use the K-40's going to the output tube grids. Now the question of R. I am partial to precision wire wound 1% and precision 1% carbon film. There are excellent choices without breaking the bank. The Vishay S102 are excellent though exactly how they will sound in your circuit remains to be heard. I have used them successfully (they sounded good) and unsuccessfully (they sounded bad) depending on individual circuit. Don't do both C and R changes at the same time and don't do them willy nilly. Have a plan. Do the C first. Then you'll be surprised to find out how important R choices can be. Lots of people like tants, Caddock mixed oxide films, and whatever else. I can only tell you what I gravitate towards because I have achieved wonderful sound with them - precision wire wound (non-inductive wind is a plus but don't obsess over it) and precision carbon film. Mills are super. I tend to shun metal oxides and metal film. A mono-culture never is a good idea. Try and listen. Try and listen. That's the way. Your ears are an excellent instrument. Learn to use them and be a happier listener.
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Follow Ups
- R & C choices - elektron 04/9/0823:15:46 04/9/08 (0)