Hello, can you give me some informations about the amplifier? Have you build? What power transformer have you used? I'm having problem in finding the right one.
schematic is for monoblocks, you need a PT with 5V 3A (for 5U4), 4,0V 1A (for PX4), 6,3V 1,5A (for el86 and 6fq7), 250 - 0 - 250 100-150mA (for HV). if you want to build it stereo you have to add a 4,0V 1A for the 2nd PX4 and double the A of the 6,3V and 250-0-250 secondaries.