| Author | Message | ||
     Mark nl |
Hey my newly acquired 112 RD 50 started humming today, and i can't get it to stop. It only hums when the input jack is connected to a cable (or a loose jack). Turning the volume of the guitar to 0 practically eliminates the problem. Turning the volume of channel to 0 stops the humming. The hum isnt really noticable at a volume below 2. The hum is more distinct on the distortion channel. There's also a hiss that becomes annoying above volume levels of 5. What could it be? (I have a Gibson SG with humbuckers) | ||
| mark nl |
P.S. How do i take out the chassis? Is it with the screws on top of the amp? (I want to check the connection of the input jack) | ||
| michael kaus |
Chassis does come out with the screws on top. BE CAREFUL. If the caps stay charged up, there are 700v in there-that hurts. If you are going to do it live, only do it if YOU feel comfortable around those voltages and take the proper precautions. We will try to help if we can. Hu, can be bad ground or bad filter cap. Usually caps will still hum turned down though. MIke. | ||
| Mark nl |
Thanks for the heads up Michael. It turned out to be a grounding problem, which i've (partly) solved. I think it has something to do with the fact that my outlet isn't grounded. Haven't had the chance to test it on a grounded outlet. Anyway..the hum is reduced to acceptable levels. | ||
| Arthurjx |
My newly acquired Music Man RD112-50 just started humming also. The clean channel is fine. The hum comes from the distortion channel at a volumn about 5 and above. I have the foot switch connected. After reading the alert above about high voltage, I'm afraid to try to mess it myself. What could be the problem? And, is there something that I can check and/or fix without getting shocked? Or, should I just get a tech to check it out? Is this a common problem with the RD112-50?......... Arthur ////// | ||
| John Drexler |
Unless you know your way around high voltage electronics, I'd take it to a tech for an evaluation. In the long run, it'll save time and money...maybe even a hospital bill! It could be anything from a bad solder joint to a bad capacitor. |