Question about KEF Audio Cresta 2 Speaker
I'm trying to bias a tube amplifier using a Sperry 350a digital multimeter.
I'm getting a negative reading when the amp is powered up (-65mA) as opposed to just 65mA.
Any idea as to why?
The most obvious solution to your problem is that you may have the meter simply connected backwards. To make life easy, Groovetubes sells a thing called a bias probe that makes biasing tube amps a breeze.
Posted on Dec 27, 2007
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Posted on Jan 02, 2017
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