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ripple

  1. CrazeeD

    How much ripple is too much ripple?

    Working on an amp that is noisy (110hz hum) and I’m measuring 250-300mV of ac ripple when cold dropping back to about 200mV when warm, off the power supply. I thinking this is too much and likely the source of my noise. Am I on the right track here or totally wrong?
  2. CrazeeD

    Nikko Alpha 450 Noise

    Hi all, me again. Still trying get the noise out of my Nikko Alpha 450. I have posted about this problem and had some great suggestions offered, the problem however persists. As a recap, this unit had a bad main filter cap (there are 4) that had leaked and was no longer making contact with the...
  3. baconbadge

    Combining Filter Caps?

    Greetings, I have a Fisher 500c here where the previous owner combined the three sections of the C92 (50uf, 50uf, 50uf) filter can cap into a single 150uf cap. First pic is schematic, second pic is how it’s rewired: The numbers are the same, but does this configuration have any real-world...
    • baconbadge
    • Thread
    • filter capacitors fisher power supply ripple
    • Replies: 17
    • Forum: DIY
  4. G

    SA-7100 Ripple Current measurements-effects on protection board?

    Hi Everyone, I've been wrestling with a SA-7100 that has a horrid buzzing noise, for a couple of years now. I replaced electrolytics(including filter caps) and transistors using guides on this forum to no avail. Last night I used an android app to measure sound frequency, and found that when...
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