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MP573 Microphone preamplifier / Output transistor bias issue?
« on: May 10, 2022, 03:59:13 PM »
Hi,
Just built a 573, all is working and the unit seems to sound good.
However, when I adjusted the bias of the output transistor, I couldnt get TP4 to go below 3.8v. It started off around 5v, but wont adjust lower than 3.8v.
Is this a problem or within tolerance?
Just built a 573, all is working and the unit seems to sound good.
However, when I adjusted the bias of the output transistor, I couldnt get TP4 to go below 3.8v. It started off around 5v, but wont adjust lower than 3.8v.
Is this a problem or within tolerance?