Laney cub 12 R noise, screeching and hum
Автор: steveward guitars
Загружено: 2024-11-18
Просмотров: 580
The Curious Case of the Laney Cub 12R
This week, I found myself in the middle of a perplexing troubleshooting session with a Laney Cub 12R. The amp was plagued by shrieking and humming noises that refused to go away. After some deep investigation, I discovered the issue stemmed from a grounding problem. However, this wasn’t your typical loose wire or dry joint scenario.
The root cause was a significant manufacturing oversight—one I’m putting politely here. The two halves of the metal chassis had no electrical connection between them. A thick layer of paint insulated the sections, preventing proper bonding. This oversight allowed positive feedback to wreak havoc, resulting in wild instability, hum, and noise.
Worse still, this design flaw meant the jack sockets lacked an electrical safety earth. This not only impacted performance but also posed a serious safety hazard. Without grounding, the risk of electric shock was alarmingly real. This is a stark reminder of how critical proper grounding is, both for functionality and user safety.
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