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Re RTX etc.

Posted by Lew (A) on January 10, 2007 at 08:40:46

In Reply to: I would certainly use them with only 200 - 300 Volts on them. posted by jeffreybehr on January 9, 2007 at 15:05:51:

You wrote, "The RTX is a VERY nice-sounding cap; why not use them? Just want to use something different?"

I agree that the RTX is a fine capacitor, and for many years they were my top choice, until I began to experiment with Teflon caps, which I now greatly prefer. My dilemma is that 1uF teflon caps (either REL or Vcap) are prohibitively expensive (since my phono is fully balanced, I need two per channel or a total of 4 @ ca $200 each!), and MIT RTXs in 400V rating are too large to fit in my preamp where they need to go. (I actually bought 4 of them from M Percy and had to return them for that reason.) I could use the smaller 200V RTXs, but that would be a bit dodgy, since B+ is 250V, altho only 130V appears at the plates of my phono output, as previously noted. Therefore, I started thinking about Mundorf Supremes, the Silver version. If you or anyone else has any direct experience comparing RTX to Mundorf, I would love to hear about it. One thing about RTX (and teflon too) is that they take a LONG time to break in, and they sound a bit "plastic"-y until properly cooked.

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