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Krell KSA150 bias problem
Krell KSA150 bias problem
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Old 11th December 2013, 08:49 AM   #1
im1663 is offline im1663  Hong Kong
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Default Krell KSA150 bias problem

One Channel of my amp do not get warm to touch, measure the emitter resisitor voltage only 30mA, but the other channel is 100mA

I think there is some problem in the so call auto bias circuit, the is no pot to adjust the bias setting.

Sound is still OK on the Low bias channel. Does any one know how to fix it?
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Old 11th December 2013, 10:13 AM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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Have you a schematic?
Support for Fender, Marshall and all Valve Equipment; Audio Innovations, Audiorama FU29, Quad and Leak. www.jonsnell.co.uk
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Old 12th December 2013, 12:34 AM   #3
im1663 is offline im1663  Hong Kong
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I don't have schematic, if anyone have it, pls email to im1663@gmail.com
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