Bias for Marantz 8b

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Hello, The meter for bias on my 8b is shot so I purchased a device that plugs into a tube socket and then put my driver Tube in that device. I thought this would work fine as I don't bias that often. Problem is I don't know what to set the bias at. I prefer the bias in millamps as that's what this particular device is designed for. Anyone know how I can get this information?
Or voltage is OK, but then I need the formula to get to milliamps... thanks so much for looking

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Topic - Bias for Marantz 8b - 41kellymack 20:04:14 12/13/16 (5)

Before you set the bias on an older amp (or even run it for that matter)!! - Ralph 09:49:53 12/14/16 (0)

RE: Bias for Marantz 8b - Steve O 06:00:45 12/14/16 (1)

RE: Bias for Marantz 8b - 41kellymack 06:40:05 12/14/16 (0)

Marantz 8b User Manual... - RadioWonder 03:24:43 12/14/16 (0)

Take a look at this one... - kootenay 20:23:11 12/13/16 (0)

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