I would like to build this amp and I need the power supply ( about 100v 200ma on the v-fet but a bit higher because the Output transformer primary impedance ) to be particularly silent since it is connected to a compression driver with 113db of sensitivity. I was thinking of using a CLCLC power supply (to have few mV of ripple) and I was wondering if the use of a Saligny power (HVHF in this case) could be useful.
My problem is that at most I can use PSUD II and therefore I have no idea how to model a power supply with a Saligny bridge. Any suggestions?
If you are concerned with ripple, just use a regular bridge rectifier in PSUDII for the simulation. The CLCLC filter will be the biggest factor in ripple reduction.
I don't know anything about the Saligny bridge, but the main difference between it and a regular bridge rectifier is probably the voltage drop. But for a 100V power supply simulation, not a problem. And the accuracy of the simulation will not be 100% anyways.
I don't know anything about the Saligny bridge, but the main difference between it and a regular bridge rectifier is probably the voltage drop. But for a 100V power supply simulation, not a problem. And the accuracy of the simulation will not be 100% anyways.
Hello pinholer, my curiosity is to understand if
"Very low mosfet internal resistance improves dynamic circuit behaviour" (from datasheet)
can actually bring benefits in a class A amp. I ask because my knowledge is too limited
There is one way to find out. I think you will probably build independent power supplies for each amp (left and right channels) since you're concerned about clean power. So, use a regular bridge rectifier in one and a Saligny bridge in the other and compare the two amps in real life.
Me, I would put my money towards nice signal transformers first. I have actually built transformer coupled SIT monoblock amps and I just used regular bridge rectifiers.
Me, I would put my money towards nice signal transformers first. I have actually built transformer coupled SIT monoblock amps and I just used regular bridge rectifiers.
It's an old project and as I recall I followed Michael's design to the letter. DM me and I'll give you my email address.
I will use input transformers 80% nickel manufactured by Dave Slagle and the output transformers are Tango Hirata so I agree with you. Time ago one of my friends build a monostage tube amplifier exactly with this schema ( input transf, tube, OPT ) with Telefunken EC8020 and he said was the most transparent amp he had ever build
Nice iron. Which Tango output transformer will you use?
I had J&K Audio build me some FG-50S copies and they work great. I configured my output stage as a follower, though, so I used a Sony VFET voltage amplification stage, interstage coupled. I reused some old Magnequest RIT-5 interstages, leftovers from my tube daze.
I ran a quick PSUDII simulation and getting sub-millivolt ripple for the power supply is not too difficult with CLC and RC for local decoupling.
I had J&K Audio build me some FG-50S copies and they work great. I configured my output stage as a follower, though, so I used a Sony VFET voltage amplification stage, interstage coupled. I reused some old Magnequest RIT-5 interstages, leftovers from my tube daze.
I ran a quick PSUDII simulation and getting sub-millivolt ripple for the power supply is not too difficult with CLC and RC for local decoupling.
