Thread: Motorola vt-71 restoration
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  #17  
Old 01-23-2013, 06:38 PM
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bandersen bandersen is offline
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Location: Chicago, IL
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Doubt it's just the 6SL7 tube causing your troubles. Waves could be some hum in the power supply. Do you have something like a B&K 1077 to inject signals into the video IF stages ?
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