Testing and preparing for a hoter version of DK339, voltage plate at 150V and cathode current set up to100mA each half of 5998 with RC input tube...

• Nov 24, 2012 by WALL-E in DK339

Constant pure DC source, battery cathode bias.

• Nov 24, 2012 by WALL-E in DK339

Capacity of output coupling caps was increased now to 325uF to get really flat Frequency Response even with 38 ohm HE 500.

• Nov 24, 2012 by WALL-E in DK339