I just bought a brand new Yaqin MC-100B tube amplifier. I love the thing... it sounds absolutely amazing even with my shitty speakers. But I found a problem. While checking the bias today I put a meter on the top metal part of each of the four capacitors that are between the transformers, and chassis ground. Two of the four caps were at or near 247 volts AC. Is this by design, or is something seriously wrong? Shouldn't the body of the capacitor have no voltage? And shouldn't all four caps be the same? Two have no voltage, two are at 247 volts. I've included a pic below which shows the two offending caps. The arrows show the "touch and fry" points.
The amp sounds great and all the bias voltages are correct (well, a dash low, but i'll leave them there for longevity's sake). What could be causing this?
Charles.
I just bought a brand new Yaqin MC-100B tube amplifier. I love the thing... it sounds absolutely amazing even with my shitty speakers. But I found a problem. While checking the bias today I put a meter on the top metal part of each of the four capacitors that are between the transformers, and chassis ground. Two of the four caps were at or near 247 volts AC. Is this by design, or is something seriously wrong? Shouldn't the body of the capacitor have no voltage? And shouldn't all four caps be the same? Two have no voltage, two are at 247 volts. I've included a pic below which shows the two offending caps. The arrows show the "touch and fry" points.
The amp sounds great and all the bias voltages are correct (well, a dash low, but i'll leave them there for longevity's sake). What could be causing this?
Charles.