6AQ5W / 6005UL four-channel single-ended amplifier circuit shown in FIG. Shown are only - channels. 4-channel system - using a power transformer for voltage amplification section uses Tokyo light sound 4CP-2508-SA type 4 with volume potentiometer
while adjusting the 4 channel volume. The output stage has a good sense of hearing UL type circuit. NFB loop two routes, all the way from the cathode tube screen output electrode via 240kQ resistance to the primary tube, the amount of feedback is 6dB, another way is taken from the output of the transformer secondary 81 "1, the amount of feedback is 9.5dB.