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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: capacitors? (help please) posted by wh0w4@aim.com on March 17, 2008 at 12:53:23:
A change in capacitance from original design depands what the capacitor is performing, of course. RF & IF circuits in a tuner section is a no-no. Coupling caps should not be varied much from original in most cases. Power supply has options and more capacitance is ok. A huge amount more is not necessarily a good option as the peak to average current charging the capacitor(s) is higher. This causes some extra heating of the rectifier diodes and power transformer. I say up to double the original power supply capacitors is ok for tube type gear and 1.33 is ok for solid-state gear. If the tube gear has a tube rectifer feeding a capacitor (capacitor input design) one must follow the tube manufactures data for maximum capacitance value. The difference in-between low voltage and high voltage capacitors is the low voltage capacitors has much lower internal resistance due to the much greater capacitance in the first place. Ultra low internal resistance causes the forementioned heating in the rectifier and power transformer.
As for capacitor voltage, higher is ok, not lower voltage.
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Follow Ups
- RE: capacitors? (help please) - Neff 04:02:26 04/05/08 (0)
- BTW- 4700uF vs 6800uF - Neff 04:38:24 04/05/08 (0)
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