Yes, a snubber of some type is an excellent way to prevent self-oscillation in many hexfets and particularly high transconductance hexfets operating at high rail voltages.
Hugh
Hugh
Hello to all VSQA designers and Builders,
I am building the pcb's designed by Thiago. Listed below are pics of an unpopuated pcb and a semi-populated pcb and also the Schematic I am working from.
A list of the changes made to match the schematic to the pcb:
1. VR1, VR2, and KSC1845 : to match VR1 and VR2 traces to the pcb / schematic I had to mount them backwards from what is shown on the pcb. I mounted them as to what is shown on the schematic. I had to cross the base and collector of the KSC 1845 to match the pcb and schematic. I hope these where correct?
2. I am at the point where I need to follow Hugh's advice and solder one green led in place of the the 2 IN4148 diodes in series or "not". If I do use 1 green led, can I solder it into the pads for one of the IN4148 diodes and use a jumper wire in the next pads for the other 1N4148 diode, or do I have to solder additional extensions on the green led leads to stretch it across the pads for the diodes in series. This all for DC offset adjustment.
If any one has built these, or have any helpful info, I would appreciate your comments.
Thanks,
MM
I am building the pcb's designed by Thiago. Listed below are pics of an unpopuated pcb and a semi-populated pcb and also the Schematic I am working from.
A list of the changes made to match the schematic to the pcb:
1. VR1, VR2, and KSC1845 : to match VR1 and VR2 traces to the pcb / schematic I had to mount them backwards from what is shown on the pcb. I mounted them as to what is shown on the schematic. I had to cross the base and collector of the KSC 1845 to match the pcb and schematic. I hope these where correct?
2. I am at the point where I need to follow Hugh's advice and solder one green led in place of the the 2 IN4148 diodes in series or "not". If I do use 1 green led, can I solder it into the pads for one of the IN4148 diodes and use a jumper wire in the next pads for the other 1N4148 diode, or do I have to solder additional extensions on the green led leads to stretch it across the pads for the diodes in series. This all for DC offset adjustment.
If any one has built these, or have any helpful info, I would appreciate your comments.
Thanks,
MM
Thanks Eric. I will use one green led and one jumper as per the schematic. Have you built this amp?
Myles
Myles
are there big commercial available power amps on the marked with such an output stage ?
in post #9 under
New Push Pull Buffer Approach for special Kind of THD - MOSFET & BjT - New for me (schematic NAD 310 #9)
is an old simulation with schematic of such an output stage based on those from NAD 310.
P.S.: concerning this NAD model a lot of threads exist here:
NAD 310 right channel gone
NAD 310, some informs needed, Reviews, listening tests, opinions are welcome.
Nad 310 Amp
NAD 310 - need some info
NAD310 Repair