At 09:43 AM 8/1/2012, alan.b.pearce@stfc.ac.uk wrote: >It sounds to me like you need to ascertain the source of the noise=20 >when the switch is slammed over, and modify the switch with some=20 >form of rubber stop or other mechanical noise absorber. This is a relatively-standard mini-toggle switch. Its mounted in an=20 aluminum sloping-front enclosure. The switch makes noise when you=20 slap its lever from one end to the other and that noise seems to be=20 amplified when the switch is mounted in the enclosure. I'm assuming=20 that the front panel functions as a sound-board. These announcer boxes are relatively old (20 years or so) and the=20 problem didn't occur as much (or at all) with the earlier announcers=20 who used them. But this particular announcer likes to slam the=20 switch from one end to the other (quite violently, actually) and the=20 noise has become objectionable. I can disassemble these switches (I've done so many times in the=20 past, with switches from various manufacturers) but I'm pretty sure=20 that I don't have a hope of adding any damping material to the=20 interior of the switch so as to quieten them - there is simply too=20 much mechanical "stuff" inside. I quite like Denny's suggestion of doing a sliding action with felt=20 friction pads. I'm going to try that today or tomorrow. I'll=20 probably actually use the loop side of some self-adhesive Velcro=20 material that I have instead of felt, though. dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .