Xin Zhi Zhao Schematic Top

She looked down at the schematic. The "Top" view was changing. The ink was reorganizing, rewriting itself.

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When Li Wei built the circuit, she observed three distinct operational modes, each a direct result of the schematic’s unique layout:

If you manage to locate an original PDF of the schematic, pay close attention to the (usually a 47k anode resistor on the 845's plate for the driver). Replicate that, and you will have an amplifier that sings for decades. Without it, you just have a hot chassis.

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