I know i will get bashed if 'opamp' is mentioned in here.. I know you guys never listen to those plastic chips...
Anyway, I want to open a discussion about the possibility of using modern opamps to drive output tubes, especially in SE design. The advantages of opamp in ultra low distortion and noise is a strong advantage from technical aspect. Also, if the opamp is powered with +/-rails, no coupling cap is required. This is useful for people who cant live with the idea of having caps in their signal path. Furthermore, 'capless' designs tend to be expensive because more iron is need.
I am pretty sure this idea has been tested so I want to ask for opinions from those who has tried it.
I am thinking of using OP627 to drive 2a3. One of my concern is the output current requirement to drive output tube. I am not EE, but I think this should be easilly solved with a BUF634 buffer. Both of these chips has been used succesfully on SS preamp designs.
Suggestions?
Anyway, I want to open a discussion about the possibility of using modern opamps to drive output tubes, especially in SE design. The advantages of opamp in ultra low distortion and noise is a strong advantage from technical aspect. Also, if the opamp is powered with +/-rails, no coupling cap is required. This is useful for people who cant live with the idea of having caps in their signal path. Furthermore, 'capless' designs tend to be expensive because more iron is need.
I am pretty sure this idea has been tested so I want to ask for opinions from those who has tried it.
I am thinking of using OP627 to drive 2a3. One of my concern is the output current requirement to drive output tube. I am not EE, but I think this should be easilly solved with a BUF634 buffer. Both of these chips has been used succesfully on SS preamp designs.
Suggestions?