waldo041 wrote:you only need 1 path to ground, anymore and you could create ground loops. if the preamp is grounded with a 3 prong then the amp can be 2 prong or vice versa. they are grounded together with the cable that links them or at least should be. however a power conditioner is not sufficient if both the power and pre amps are 2 prong, you will become the path to ground.
mgbills wrote:I had my Mc2100 serviced by Classic Tube Audio (Vancouver, WA). He's a one guy shop. Pat reiterated Mike's point. These amps were designed to be used in a system, and that system was grounded at 1 point. He recommended not changing the cord in my application.
TRG wrote:I swapped out the 2 prong cord on my 250 for a 3 prong IEC inlet, so that I can just remove the plug when transporting and plug back in when ready. Been working great for me...
Smolder wrote:mgbills wrote:I had my Mc2100 serviced by Classic Tube Audio (Vancouver, WA). He's a one guy shop. Pat reiterated Mike's point. These amps were designed to be used in a system, and that system was grounded at 1 point. He recommended not changing the cord in my application.
I hear that... but that system was for home audio back in the day when grounded household wiring was not the code standard. The main reason that the audio guys like the two prong is to remove the ground loop and subsequent hum. It's just a bit different when you holding a conductor and stepping up to a mic that may or may not be grounded compatibly. If you are running a pair of macs, you can address any loop issues in front without lifting the ground. Just my opinion though.
waldo041 wrote:a mic or pa system that does not have the same earth ground as your rig will shock you everytime REGARDLESS if you have 2, 3 or 4 - 3 pronged components within your rig. you become the path of least resistance everytime. fact is, you only need 1 earth ground within your rig and anymore is only providing a second path that can and usually does create a hum. if you are wanting to ensure you do not get lit up by the mic, a continuity tester with one probe on the ground pin(pin 1= earth pin) of the mic cable and one to your ground pin of your rigs outlet usually will tell you if you have the potential of getting shocked.
tcsned wrote:sorry to derail a but, but Waldo, are you saying to put the continuity tester into then ground of the outlet the rig will be plugged into and on the ground pin on the plugged in mic cable with the PA on (I assume) and if it lights up then I'm gonna light up? I've got a gig at a club next month at a club that a regularly get a good night of shock therapy.
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