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electrolytic

  1. M

    Spec sheet vs actual electrolytic capacitor discrepancy

    I’m in the process of replacing the electrolytic capacitors in a vintage 1947 Magnavox CR-197 radio/phono console, and ran into a small issue, where the voltage ratings on the can that I’m replacing don’t match the voltage ratings of the same cap on the radio’s original spec sheet. I’m trying to...
    • Mai Tai
    • Thread
    • capacitors electrolytic magnavox radio console vintage
    • Replies: 7
    • Forum: Tube Audio
  2. Clay Wright

    ESR compensation

    Quick question: but first, I've read about how one can add a small series resistor to compensate for ESR when replacing electrolytic caps with film caps, but it seems most of the talk is with tweeters that I could find clear explanations for. It's obvious that when compensating for the ESR...
    • Clay Wright
    • Thread
    • compensation electrolytic esr film capacitor replacement
    • Replies: 7
    • Forum: DIY
  3. SmokedPorter

    CR-2020 Service Bulletins - Please Help

    I am not a technician and need advice on getting upgrades done on two CR-2020s. See “Background” below regarding the our two CR-2020s. Anything will be greatly appreciated. Thank you. A couple of days ago I dug out our two CR-2020 receivers to look further into the speaker protection relay...
    • SmokedPorter
    • Thread
    • advice cr-2020 electrolytic help needed power supply regulator transistors service bulletin yamaha
    • Replies: 6
    • Forum: Solid State
  4. H

    Crossover Capacitor Quality and Kirchhoff's Laws

    In almost every thread regarding recapping vintage speakers, people refer to capacitors which carry the signal "through" vs. those that "bypass" a driver and therefore don't benefit from a higher quality capacitor. It's my opinion, grounded (no pun intended) in Kirchhoff's laws, that this is...
    • hh66
    • Thread
    • capacitors caps crossovers electrolytic film
    • Replies: 16
    • Forum: Speakers
  5. baretta

    How do you know when it's time to change electrolytic capacitors?

    Does the sound of your receiver or amp change? Or do you go by the looks of the caps? Or do you change them routinely after a certain amount of years regardless?
  6. M

    Capacitor voltage rating

    I'm wondering about voltage ratings on electrolytic capacitors. I know it is possile to use a capacitor with a higher voltage rating - but how much higher is ok? I'm re-capping a Pioneer receiver and there are a number of 100uF caps, some rated 16v, some 25v and some 35v. Now, I have in stock...
    • M1keC
    • Thread
    • capcacitor electrolytic voltage
    • Replies: 6
    • Forum: DIY
  7. jpatti75

    Tube Amp - Capacitor Cross Reference?

    Doubtful this fits the category of "best of old tube technology", but I recently picked up a 1960 SK70 3-channel Motorola Tube Console Stereo. :) While it powers and the tubes at least fire, it needs a thorough going through and I imagine at least some of the caps need replacing. Finding...
    • jpatti75
    • Thread
    • capacitors electrolytic motorola sk70
    • Replies: 66
    • Forum: Tube Audio
  8. Beavs

    Yamaha CR-2040 Shorted During DC/Bias/Voltage Adjustment

    Well, I'm pretty new to this and probably have no business digging into the likes of a CR-2040, but this is what I've found to pass the time and I'm enjoying every second of it. I picked this CR-2040 up for $200 knowing it was cosmetically great aside from being dirty and there was no sound out...
    • Beavs
    • Thread
    • capacitor electrolytic output transistor recap restoration transistor troubleshooting yamaha cr-2040 zener diode
    • Replies: 143
    • Forum: Yamaha
  9. baretta

    Why do electrolytic capacitors wear out?

    Defects? Underuse? Overuse? What are some ways to make them last longer?
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