Tube Amps / Music Electronics
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|previous: Peter Michaux Re: Polarity Switches in 50W Heads/ AC POLARITY?? -- 6/12/2000 4:38 AM||View Thread|
|6/12/2000 6:26 PM|
|Tim Swartz||Back to the Marshall question...|
It seems like US export Marshalls must have gotten the polarity switch about the same time they got the upright mains...('68?). the upright mains was a UL requirement...polarity switch could be too??? US amps kept them until they went to rocker style switches in about '75.