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To make it perfectly clear, my idea was to have just one electrolytic in the B+ supply. A single big one after the rectifier. The point was to significantly increase the life span of the B+ supply and away from all the heat. You can replace all the other caps with polys. Slightly bigger but cleaner PCB real estate and practically never having to worry about replacing elcos.You really don't have to worry about pre-MOSFET filtering with a single big elco. It's not really a regulator but a dropper of voltage. Simply make sure the lowest of the low sine voltage of the single elco after the rectifier is lower than the dropper MOSFET voltage - and you have clean perfect B+. The only design constraint is the circuit you will supply. That will determine both the size of the elco and the drop you will program for the MOSFET.As you probably want to create a generic PCB for all future projects as well, just make sure to leave room for that one big elco. The rest is all about the MOSFET dropper and the size of the heat sink as a higher voltage drop will create more heat.I have used this in all my tube projects since its invention - not mine to be perfectly clear, but consolidated from the knowledge of this forum. It's a thing of a beauty.
To make it perfectly clear, my idea was to have just one electrolytic in the B+ supply. A single big one after the rectifier. The point was to significantly increase the life span of the B+ supply and away from all the heat. You can replace all the other caps with polys. Slightly bigger but cleaner PCB real estate and practically never having to worry about replacing elcos.
You really don't have to worry about pre-MOSFET filtering with a single big elco. It's not really a regulator but a dropper of voltage. Simply make sure the lowest of the low sine voltage of the single elco after the rectifier is lower than the dropper MOSFET voltage - and you have clean perfect B+. The only design constraint is the circuit you will supply. That will determine both the size of the elco and the drop you will program for the MOSFET.
As you probably want to create a generic PCB for all future projects as well, just make sure to leave room for that one big elco. The rest is all about the MOSFET dropper and the size of the heat sink as a higher voltage drop will create more heat.
I have used this in all my tube projects since its invention - not mine to be perfectly clear, but consolidated from the knowledge of this forum. It's a thing of a beauty.
