I have become very confused about how to ground AF power amps. I have an old 69 Marshall "69" 100W plexi with 2/4X12 speaker cabinets and it is getting old and has been repaired once (about 1980). I had to replace the power cord and switch myself and used a three lead power cord with the center (green) lead cut off (it has a polarity switch) and a cheap RS mini SPST on/off switch in about 1980. An amp tech in Texas replaced the output transformer at his time (I allowed a group in Colorado called Aphrodite to use the amp for a concert with Buddy Miles and they blew it up! Lead player was Snuffy Walden who did all the guitar in "30 something" ). Anyone have a suggestion as to how I should ground this beast or should I just leave it alone? I get zapped all the time if I'm not careful.
I have read a lot about a "star ground" but find little agreement on exactly how to implement it. My general impression is that the power ground (e.g. green wire of the power cord) should be grounded as close to the power outlet as possible and the signal ground should be grounded as far from the power ground as possible. All signal grounds go to the single star signal ground and all power grounds go to the power star ground.
Is this correct?
LouTheBlueGuru
I have read a lot about a "star ground" but find little agreement on exactly how to implement it. My general impression is that the power ground (e.g. green wire of the power cord) should be grounded as close to the power outlet as possible and the signal ground should be grounded as far from the power ground as possible. All signal grounds go to the single star signal ground and all power grounds go to the power star ground.
Is this correct?
LouTheBlueGuru