| Author | Message | ||
| stratcat73
New Username: stratcat73 Post Number: 1 Registered: 2-2008 |
My friend has a FX-1 that has 60 cycle hum until he lifts the ground. He suspects a ground loop problem. Any ideas on how to solve this? Thanks in advance for the help. Rich | ||
| davehouck
Moderator Username: davehouck Post Number: 6248 Registered: 5-2002 |
Hi Rich; welcome to the board! 60 cycle hum may be related to the capacitors. Check the capacitor leads to make sure they aren't broken or that the solder joints are loose. | ||
| olieoliver
Senior Member Username: olieoliver Post Number: 1754 Registered: 2-2006 |
I'd start with the simple stuff first. If it's mounted in a rack make sure it's seperated from any other device in the rack. (i.e. no metal of any other rack items touching another.) I had this same problem with my Yamaha SPX 90. Upon looking I noticed the rubber feet the were once on the bottom of the SPx90 were missing and allowed it touch the unit below it. I a piece of rubber hose between it and the hum went away. Olie | ||
| freefuzz
New Username: freefuzz Post Number: 2 Registered: 2-2008 |
60 cycle hum has nothing to do with capacitors, since capacitors come after diodes, which give the capacitors 120hz. you have a ground loop, as olieoliver states. isolate the f1x from anything else in the rack, or cut the shielding off of one side of the sound cable (NOT POWER GROUND), or better, use a behringer (or even better, an ebtech) humdestroyer in between the f1x and the poweramp. this always works. |
