Golden throat E405-MOD front and rear stage combined power amplifier board

Designed and improved by LJM. The LJM version is L9.

Dual channel, 2 boards.

Using twin FET input tubes

Using imported original Texas Instruments NE5532 as the preamplifier. DC servo DC SERVER circuit.

The output power transistor can be paired with original KEC KTB817 and KTD1047 pair transistors.

Parameters:

Power supply voltage from+-25V to+-55V

Maximum output power 150W 8 R

Voltage gain 90

Frequency response: 20HZ-0.05DB. 20KHZ -0.15DB.

THD+N<0.02% 50W8R