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polarity switch [message #725] Tue, 26 June 2001 17:22 Anonymous please explain what the polarity switch does on a K250- the guy i bought it from basically said it has to do with no ground and the polarity switch keeps you from getting Zapped from the mic ( been there done that) (ouch!!!) he told me to go to radio shack and get a polarity tester for $3 the "kids" at radio shack tried to sell me a $30 battery tester (oh well) they couldn't find anything about a polarity tester after i tried to explain it to them- thanks for the info-jeff in minneapolis Report message to a moderator

Re: polarity switch [message #726 is a reply to message #725] Tue, 26 June 2001 22:21 KustomBlues Messages: 490 Registered: June 2001 Location: Michigan Senior Member Jeff, do yourself a huge favor and put a 3 prong grounded cord on that 250!!!! It will save your lips from sizzling. Then, with that 3 pronger on there, the polarity switch essentially will do nothing--it won't matter. But, you will be safe from zaps (as long as the Pa is plugged into the same wall socket or line as your head) and it could safe your 250 from an electrical disaster= repair time and money. Report message to a moderator

Re: polarity switch [message #728 is a reply to message #726] Wed, 27 June 2001 08:27 Anonymous Jeff, I agree with kustomDeb. The switch actually reverse's the line cords ac. Just as if you removed the cord from the wall and turned it 180 degree's and pluged it back in. It also reduces hum in the amp. Put a new 3 prong ac cord and you won't have to worry about zap's. Connect the white and black leads where the original wires are, and connect the green ground wire to the chassic frame. Another important reason to make the change, is to prevent any damage to the amp if you are going to direct line it to a PA or when using direct box out to a PA that may be 100' away using a different power source than the main stage. Good luck, and glad tou have you on the site. Don Report message to a moderator

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