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Old 1st June 2012, 02:41 PM   #1
Mayday is offline Mayday  Sweden
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Join Date: Mar 2004
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Default Problem with TA2022 BTL

Wired this amp together today and yesterday.
Right channel sounds fine, Left channel is a very loud humming.
I've built plenty of amps, but never with TA2022 and never BTL.
Click the image to open in full size.
Hooked it up to a 400VA 2x22VAC toroid.
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Old 1st June 2012, 03:25 PM   #2
Mayday is offline Mayday  Sweden
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The seller is as confused as I am as to why it isn't working. I'll send this board back and get a replacement...
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Old 15th September 2012, 09:06 PM   #3
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I ordered this same board and encountered the same problem. First thing I noticed when hooking up the board was the single ground wasn't tied together at all. I ran a jumper wire between the two grounds on the signal input and this greatly reduced the hum. It is still audible when the amp is powered on and volume is all the way down but you cannot hear it once you turn it up. So, the ground between the audio input not being shared is my best explanation for this problem. I will muster up a better fix shortly.
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Old 15th September 2012, 09:48 PM   #4
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Bottom line, something is horribly wrong with the layout of that board. Get money back rather than a new board, especiazlly since your not the only one encountering the same issue.

I'd say whoever cadded this board made an error somewhere, meaning the entire batch is bad.
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Old 27th December 2013, 09:51 PM   #5
andypap is offline andypap  Greece
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Hi, I know this is an old thread , but did anybody found the couse of problem and the appropriate fixing? the channel (right) operates without hum sounds preety good!! I still beleive it deserves a second attempt to fix the faulty channel..
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