At 04:02 PM 7/31/2012, Roger Furer wrote: >Here is a link to Switchcraft Industrial Lever Switches: >http://www.switchcraft.com/productsummary.aspx?Parent=3D527 > >I'm not sure how big these are, but you can read the specs yourself. > >One thing I'm unsure of; if it is a control voltage that is being=20 >switched, what kind of noise is being generated? Is there a=20 >prolonged contact bounce? Or is it the mechanical noise of the switch its= elf? Yeah - those Switchcraft switches are one style of the telephone=20 lever switches that I mentioned. Pye makes another version with=20 significantly less depth but they are also too long (deep) for the enclosur= e. The problem is the acoustic noise that occurs when the switch is=20 slammed between its end-stops. The announcer is wearing a=20 sportscasters broadcast headset (with cardioid mic and stereo=20 headphones) and the announcer box (with the switch) is only 16 or so=20 inches away from the mic. The noise is lessened when I install a rubber boot on the switch and=20 is eliminated if the announcer grasps the switch toggle between thumb=20 and forefinger, then moves it between the on and off=20 positions. However, the announcer doesn't like doing that - he would=20 rather just slam his hand up or down to operate the switch. I can't=20 replace the announcer, so I need to replace the switch . There is a slight RC delay on the control voltage that operates the=20 FET audio switches - this gives a rapid fade up and down of the mic's=20 audio rather than an abrupt change. This delay means that the noise=20 of the switch being turned ON is much less than that of the switch=20 being turned OFF. Unfortunately, I haven't yet figured out a way to detect that the=20 announcer is about to turn his mic OFF before he actually does it=20 . Thanks for the suggestions, and please keep them coming. 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 .