Never have either of those problems and I use around 150 a month. There are a whole myriad of different spec. If you have a cheap source of them, use them.ĭisagree on the Ceramics, it depends on the quality. PIO (depending on construction) can have less absosrption than PP or PE caps and thus sound better still, but aren't necessary unless you are doing audiophile amps. Xicon polypropylene caps are brown instead of orange. Polypropylene is prefered as its absorption losses are less, this results in cleaner signal transmission. Orange caps can be either Polypropylene or Polyethylene, so you can't go by the color. They are microphonic, and shift value with applied voltage.įor pf range caps, silver mica is the only way to go. TheGimp wrote:Avoid Ceramic caps like the plague. Simple question with a ridiculously long and complex answer. Others should have lots to add here, you sort of opened up a can of worms. Sprague 6PS Orange Drops and mica are sort of a stand-by for most people as the combo really does sound fine and looks neat to boot. You'll get lots of opinions here and there are a lot of options. These are about as good as it gets before you go Teflon, which is prohibitively expensive IMO. Some are better than other but honestly, most tube amps won't notice the difference between one brand and another.įor signal caps, I use paper in oil and polystyrene whenever possible. Sprague/Atoms, F&T, Illinois, JJ, Xicon and others all make usable HV electrolytics. They don't make any super HV caps but just about any electrolytic they make is titties. A brand that a lot of people don't mention much in the tube amp world is Nichicon but I recommend them over just about any other manufacturer. The opinions for caps vary all over the place. Metal-oxide flame retardant resistors are best for anything over 1W in the power supply but I also use a lot of overrated CC resistors in the power supply because they are low inductance and are very sturdy typically. I don't like the Xicon metal films personally but I love any Dale RN series resistors (as do the Dumbel guys). Metal film are the lowest noise, most accurate and peoples opinions vary all over the place. CC (carbon comp) resistors are noisy and should be avoided in the plates and anywhere that needs a large value (they have lots of thermal noise!). You'll quickly learn that certain resistors don't belong in certain places though. This is a big mix of Dale, Ohmite/Stackpole CC resistors, Xicon and pretty much anything that Ohms out and has strong leads. For most personal stuff I use pretty much anything in my pile.
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