bmanone
Active Member
It’s been about 8 months since I repaired and replaced all the electrolytic capacitors in my Yamaha M-80 Stereo Power Amplifier except the large power supply capacitors (2 each 47000uF/45V and 2 each 33000uF/56V). The four capacitors had no sign of failure (no electrical short, no leaking of electrolyte and no bulges), I did not have an LCR meter to test the capacitance or ESR. What will happen if these nearly 30 year old capacitors start to fail: will the amplifiers output start to hum at 60 or 120 Hz; will the output start to clip and cause increased distortion; or will a capacitor failure cause cascade failure of downstream components of the amplifier? These 4 large capacitors are expensive and it’s hard to find any that will fit, so I’ve postponed replacement. If failure of these capacitors is going result no damage to the amplifier, then I’ll wait to replace, but if failure could cause damage then it’s probably time to replace them. Have any of the forum members replaced these 4 large filter capacitors in their M-80 or M-85 (probably the same capacitors, at least they are mounted the same), what did you use for replacements, do you have any photos of the replacement?
Thanks,
Barry
Thanks,
Barry