I am getting ready to build the 200W version of this amp this year - hopefully. I have two questions:
1. What current gain group would you recommend for the BD139/140 BJTs - 10 or 16?
2. What are your thoughts about using a switching power supply with the amp - something like Hypex SMPS1200A700 (63Vdc 100 kHz switching frequency)
1. What current gain group would you recommend for the BD139/140 BJTs - 10 or 16?
2. What are your thoughts about using a switching power supply with the amp - something like Hypex SMPS1200A700 (63Vdc 100 kHz switching frequency)