Hello guys. I have built inthe past one dc coupled amplifier and enjoyed its sound very much. But there were weak bass and dynamics. I felt that the cathode resistor is a bad thing.
My schematic of the amp is here:
[IMGDEAD]https://scontent-prg1-1.xx.fbcdn.net/v/t1.15752-9/83289294_229847544681050_4874448720277536768_n.jpg?_nc_cat=110&_nc_oc=AQmHaBD7vyabnVR4q-lTh4pZVpOsIUNZmwO82v9N8Kh5dRyVErHBs_S5LLCmsittg4A&_nc_ht=scontent-prg1-1.xx&oh=678da3c9596e240a3020a534cc7a0278&oe=5EC2EC38[/IMGDEAD]I tried changing the ultrapath into cathode cap and vice versa but no difference in sound.
Do you think that it is possible some DC coupled without that big cathode resistor? Something like this,justvery big negative grid supply instead of the Rk voltage drop? Will it work? What are your opinions?
[IMGDEAD]https://scontent-prg1-1.xx.fbcdn.net/v/t1.15752-9/s2048x2048/85061331_637517260125821_4546793799933755392_n.jpg?_nc_cat=102&_nc_oc=AQkrGf-WsD9kkbIVdU7Zrbr9GQhhwSd0ho_QqBfYdCLATXZMKllObzM9VwO_JAqkCBs&_nc_ht=scontent-prg1-1.xx&oh=97432d21d3bdbeec54bec6868442be4c&oe=5ED50B52[/IMGDEAD]Thank you. Best regards, Michal
My schematic of the amp is here:
[IMGDEAD]https://scontent-prg1-1.xx.fbcdn.net/v/t1.15752-9/83289294_229847544681050_4874448720277536768_n.jpg?_nc_cat=110&_nc_oc=AQmHaBD7vyabnVR4q-lTh4pZVpOsIUNZmwO82v9N8Kh5dRyVErHBs_S5LLCmsittg4A&_nc_ht=scontent-prg1-1.xx&oh=678da3c9596e240a3020a534cc7a0278&oe=5EC2EC38[/IMGDEAD]I tried changing the ultrapath into cathode cap and vice versa but no difference in sound.
Do you think that it is possible some DC coupled without that big cathode resistor? Something like this,justvery big negative grid supply instead of the Rk voltage drop? Will it work? What are your opinions?
[IMGDEAD]https://scontent-prg1-1.xx.fbcdn.net/v/t1.15752-9/s2048x2048/85061331_637517260125821_4546793799933755392_n.jpg?_nc_cat=102&_nc_oc=AQkrGf-WsD9kkbIVdU7Zrbr9GQhhwSd0ho_QqBfYdCLATXZMKllObzM9VwO_JAqkCBs&_nc_ht=scontent-prg1-1.xx&oh=97432d21d3bdbeec54bec6868442be4c&oe=5ED50B52[/IMGDEAD]Thank you. Best regards, Michal