Normal
Re: Power supply for GL 3000 scary noiseI wonder if the mounting screws for the transformer have come loose and are allowing the normal vibration to create a buzz. If it's really noticeable, you might want to have a bench tech take a look. PSUs were not one of A&H's strong suites when it came to reliability on their smaller analog desks. I've had a couple of failures of the RPS9 for my GL2200. But the issue was different than yours. I had voltage regulator IC failures which dumped a lot of noise into the board.
Re: Power supply for GL 3000 scary noise
I wonder if the mounting screws for the transformer have come loose and are allowing the normal vibration to create a buzz. If it's really noticeable, you might want to have a bench tech take a look. PSUs were not one of A&H's strong suites when it came to reliability on their smaller analog desks. I've had a couple of failures of the RPS9 for my GL2200. But the issue was different than yours. I had voltage regulator IC failures which dumped a lot of noise into the board.
