1pcs finished Goldmund circuit Mono power amplifier board DC±35v- ±70v K1058/J162 (Class A quiescent current is freely adjusted）
Amplified line: This line adopts the classic Goldmund line. The parameters of the input stage and the voltage amplification stage are completely derived from the Gaowen line. The structure, parameters and materials of the line are exactly the same as those of Gaowen. The push stage and the output stage are conventional. The way and using 2 pairs of K1058/J162 in parallel.
Input stage: The most complete closed-loop constant current source structure + current mirror technology is adopted, and the gold-sealed field field tube is used as input. Make the differential pole operating point absolutely balanced. The music details are extremely rich, and the static output midpoint is very stable.
Voltage level: Goldmund's classic differential voltage amplification stage increases the density of sound.
Output stage: This power amplifier board uses two pairs of Goldmund original machine K158/J162, two pairs of parallel. The tube is a negative temperature coefficient tube and does not require a temperature feedback triode to be mounted on the heat sink.
Power supply: DC±35v---±70v Recommended ±60v, 150w/8 ohms
Output power: 30-150w/8 ohms
Printing plate size: 89*96mm; power tube can be installed horizontally
The board noise: within 0.4mV
The midpoint of the board: within 2mV
