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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Re: Also one more about the caps - Chris posted by jts on April 22, 2004 at 08:23:26:
Modern electrolytic caps have the arrow pointing to the negative, and it's easy to confirm this. The can will be negative and the lead coming from the insulated end of the cap will be positive. Old electroytic caps tended to have the positive end marked--why they changed is anyone's guess.Tubes that read mid-green on the meter should be fine. Mid-green is where new tubes are supposed to test. Just because the other 6550's test higher does not mean that they will perform any better in the amp or last any longer. Everyone using tube testers needs to remember what they were designed to do: find bad tubes. Bad tubes are those that are likely to cause trouble in tube gear due to inadequate gain, shorts, or grid current. Tube testers were not designed to determine the "goodness" of a new tube, or determine if a tube had ever been used before. Determining "goodness" was a job for lab equipment, and determining if a tube has ever been used comes closer to the crystal ball department.
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Follow Ups
- Re: Also one more about the caps - Chris - Chris Haedt 09:41:20 04/22/04 (2)
- Re: Also one more about the caps - Chris - Chris Haedt 13:07:48 04/22/04 (1)
- Re: Thanks Chris - NT - jts 21:20:33 04/22/04 (0)
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