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Greetings all.My first post here in the Asylum. I'm new to tubes, having just purchased my first piece of gear in the form of a used AES AE-3. Unpacked it today, put the tubes in (using a sock on my hand), hooked it up to my Bedini 150mk2 and sat back to enjoy.
No left channel. Lots of hum.
I assume the hum is from a ground loop, so I'll not worry about that yet, but the absence of sound from the left is more than troubling. I swapped out interconnects to no avail. Let things sit for a few, and when I came back the power amp was very hot. I shut everything down and won't touch it until I can get some info. Any thoughts?
Follow Ups:
i've heard such a system someplace, and i thought it sounded pretty good..must be a ground loop. lift yer ground on either the amp or pre.. bet that works!
Beltway, stop, one thing at a time. Lets put everything back as it should be, cables and tubes, right to right, left to left. As stated above lets try swapping just the tubes, take the tubes that are for the right channel and put them in the left channel, take the left and put them in the right. Now, if the problem follows the tubes, again as stated above, the problem is with the tube/tubes, the problem is following the tubes. Since you bought used there is no telling how old the tubes are or if they got bounced around in shipping, who knows or cares, buy a new set of tubes. Now if the problem stays with the left channel regardless of what tubes are in the left channel than the problem is more likely with the preamp itself. Even with a ground loop problem you would be getting sound from the left channel. Try that, again if the problem follows the tubes, a new set of tubes and you should be in heaven............
Try swapping the tubes around. Left to right and see if the hum stays or changes channels. This is to rule out a tube problem.
Thanks for the response. I tried that, but no dice.I also swapped the outputs just to check. Symptoms reversed channels, but didn't go away.
I've put my old SS pre back into the stream. Everything plays fine, so there are no connection issues and no apparent damage to the power amp.
So very sad. Not a good intro to tubes, but I will overcome.
"I also swapped the outputs just to check. Symptoms reversed channels, but didn't go away."
Tells the story right there. You have a tube that is problematic/bad. Possibly not seating correctly? Check the pins on each. If not get some new tubes to try.
Since he preceeded that statement with *I tried that, but no dice.* in reply to snowmiser's advice to swap tubes.
Buying used is always a crap shoot. Like my Dad said, buying used is buying someone else's problems.So we must assume that beltway swapped tubes from one channel to another? I still think it is the tubes.
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