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Old 10th Aug 2017, 12:19 am   #5
GeoffK
Heptode
 
Join Date: Mar 2016
Location: Essex, UK.
Posts: 602
Default Re: SRP51/SRP52 problem

The output bias current measured between + rail point 11 and TR4 collector should be between 6 to 7 milliAmp (mA) for AD161/AD162 transistors, will be similar for AC176/AC128. The bass distortion could be mechanical due to the stylus not tracking properly.
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