What do you think about the regulated power supply?
The power of the amplifier is not high so there should be no problems....
IMO a regulated power supply would help to get the most out of this simple circuit
Don't worry - we will still be going around LineUP projects 🤣
Regulated is to prefer, of course.
That way we could use 2x15VAC transformer and perhaps raise the supply to 2x18VDC. Or at least 2x17VDC.
LM317 + LM337 is one favorite. They are quite good.
With raised supply comes change in the bias of MOSFET, but that is all changes needed.
I was thinking about something else
Remember this?
https://www.diyaudio.com/community/...ators-15v-with-good-performance.402125/page-2
I built this power supply in several copies.
It works perfectly with my headphone amplifier (based on your Cello amplifier - but with a few of my modifications), with a few DACs
I made a project of a more powerful version of this power supply specifically for a small amplifier
In LT Spice it looks very good - but the prototype has not been created yet
I think that this amplifier with this power supply will be it!
Attachments
At least there will be something to see in the box.
Lineup, I have another curved ball. This project can go on forever. Wat about variable LP and HP filters so some DIYers can change their speakers to active. Am I going to far? 🤔
Lineup, I have another curved ball. This project can go on forever. Wat about variable LP and HP filters so some DIYers can change their speakers to active. Am I going to far? 🤔
Hi, tuning into this project a bit late. This looks like exactly the project I'm looking for. There seems to be a couple long threads here in terms of where this is at currently. Can some one sum up everything here? :
1 - has anyone made any PCBs ? Is there a final set of gerber files?
2- Is there a full 2 channel board design? or are they all mono?
3- Final power supply design and PCB/Gerber file
Thanks for the help:
Tim
1 - has anyone made any PCBs ? Is there a final set of gerber files?
2- Is there a full 2 channel board design? or are they all mono?
3- Final power supply design and PCB/Gerber file
Thanks for the help:
Tim
I did this with LF353 and Irfz40 and irf9z40 years ago.
Biased at 5.6v provided 25w at 14.4 volts.
At 33 volts would do 100 watts into 4 ohms
Great little amp.
Running bridged for power.
Biased at 5.6v provided 25w at 14.4 volts.
At 33 volts would do 100 watts into 4 ohms
Great little amp.
Running bridged for power.
Final set of gerbers-post 62 (pcb-mono , power supply CRC(mono)
post 72 -gerbers wersion smd (mono)
I've tested power supply
Amp's PCB NOT TESTED
Regulated power supply -NOT TESTED
This time - there will be no Gerbers - until I test the device
I have not done PCBs for over five years, but I guess with time I can lay PCBs for above two options if anyone is interested. The pot will be wired to the boards simply because I don't have pots in my library and creating them is a shlep. Anyway that is me for now. A friend has arrived who is taking me grocery shopping 
PCB 66x46mm soic+tht+input cap
gerbers
Attachments
I would add two or three more holes for the input capacitor so that smaller capacitors, with shorter hole spacing, can also be tried.
My eyes do not recognize whether the little power caps are between the voltage connection and the transistors - on pcb.. It may well be that the capacitors are better between - I don't know.
I would even advise leaving the capacitors off the board for reasons of homogeneity - but the board assembler can try it out for himself and listen and decide later.