I think John was "not" talking about getting rid of hum, but "was" talking about older buildings where one might not have a choice of outlets.
I didn't mean to derail the original intent of this post, but since a few of you have some pretty strong convictions about using a "cheater plug" ( and rightfully so for safety reasons ), I started to wonder what you actually do when confronted with only a 2-prong outlet(s) at a venue. I truly appreciate the concerns expressed for my safety by dancingdogmuse, Tom Munch and others and must say, this is a personal decision of mine to use these. I'm not advocating the general use of these "cheater plugs"!
That said, I can tell you that in the Midwest USA, and especially with 100+ year old buildings, electrical challenges abound! If I were to investigate the actual electrical wiring of some of these venues, I suspect I'd find 60-amp electrical service for the entire building, or a DIY addition to the service that would send chills down any qualified electrician's spine!
So, when confronted with 2-prong outlets in a building, what do you do??? Do you refuse to plug in your equipment? Do you say to the person who hired you for the gig, I "refuse" to play because of your outlets? Keep in mind, we may have driven a few miles to get to the venue in question, not knowing what to expect, since we hadn't been there before. Do you cancel the gig? Play without backline amps or sound support?
"Sometimes" that little screw holding the cover plate might be hooked to the ground, but if I were to actually test some of them, I suspect the majority are not. And even if it that little screw does indicate "OK" by your testers, would you trust it?
I've never "thought" this much about using them, but your inputs have caused me to re-think things. I'm really curious on what action(s) you take whenever confronted with 2-prong outlets at a venue where you've been hired to play music and entertain. Do you really 'cancel' the show?
Forum-Admin: Please feel free to spin this off to a different subject heading, if you deem appropriate.