Modi Sir,
Although the design for this machine is one 6SN7 for two channel, I wish to have two 6SN7 for each channel and one 5ar4 at the board. I would like to use one 6sn7 for each channel. Since, I wish to upgrade to two level phase inverter for the futher. Besides, I wish to know the price to upgrade the cap for the rectifier parts. I am seek for useful message as soon and meet you at the coming Firday. Thank you very much.