Red Jacket Mike
500+ Head-Fier
- Joined
- Jan 25, 2010
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I just got my WA6SE back from Woo Audio today; I had sent it in to get the modifications done in order to use 6FD7s and other tubes. My amp was built and purchased earlier this year, before that change had been made.
I connected everything, and fired up the amp, only to hear an extremely loud hum in both channels (louder in the left, though). This is not a faint background hum as mentioned in some threads I found while searching for this problem; it's really loud, almost drowning out the audio. I'm afraid to keep the amp on for more than a few seconds after it starts.
I have a Marantz CD5003 connected via optical to a DAC Magic, and then RCA outputs to the WA6SE. I've tried switching tubes, switching RCA interconnects, checked all my other connections, checked the power umbilical cord, etc., and the hum persists. I've just emailed Jack explaining the problem, but I thought I'd post here, in case it's something simple I haven't thought of. Basically, I have everything connected the same as before. I had been using an EML 5U4G and a pair of Sylvania 6EW7s.
I've also removed the bottom plates on both the amp and power supply to check if any caps are blown, or anything else looks amiss; everything seems fine on the inside.
Does anyone have any suggestions for what I might try? This is frustrating, after being without the amp for a couple of weeks, I may have to send it right back there for repair again. Thanks in advance for any help anyone can give.
I connected everything, and fired up the amp, only to hear an extremely loud hum in both channels (louder in the left, though). This is not a faint background hum as mentioned in some threads I found while searching for this problem; it's really loud, almost drowning out the audio. I'm afraid to keep the amp on for more than a few seconds after it starts.
I have a Marantz CD5003 connected via optical to a DAC Magic, and then RCA outputs to the WA6SE. I've tried switching tubes, switching RCA interconnects, checked all my other connections, checked the power umbilical cord, etc., and the hum persists. I've just emailed Jack explaining the problem, but I thought I'd post here, in case it's something simple I haven't thought of. Basically, I have everything connected the same as before. I had been using an EML 5U4G and a pair of Sylvania 6EW7s.
I've also removed the bottom plates on both the amp and power supply to check if any caps are blown, or anything else looks amiss; everything seems fine on the inside.
Does anyone have any suggestions for what I might try? This is frustrating, after being without the amp for a couple of weeks, I may have to send it right back there for repair again. Thanks in advance for any help anyone can give.