Miles can you verify pcb layout for A33, I have made some corrections. I'll not be getting lots free time till new year, I hope to get it finish before Christmas.
Regards, Sonal
100R feedback resistor must be connect to input gnd (SGND) not to PGND...
Wow, that is a true work of art. Looks in real life as good as the pure pcb-design (and a bit better
).Very cool!
regards Olaf
I have not tried printing component labels yet, but it looks like toner transfer using flat iron???
toner transfer,he has found out what temperature is the best to do it. if the iron is too hot that the paper will stick to a pcb and labels will be brittle and fragile. if the iron is not warm enough than paper will not stick to a pcb but neither will labels.
it depends for each iron and it must be adjusted with practic work. it depends from thickness of paper used for printing,thickness of toner on paper and than on temperature.
the easiest way is to use the laminator (if that is the word in english) ,a device that is being used to make a visit-cards. slide a pcb with toner-transfer paper through it 10-15 times and you will get similar results.
https://www.youtube.com/watch?v=mEOTXlQcA44
You've likely seen this site but if not there's a lot of good hints here. The toner reactive foil helps with porous toner too. Much better finished product.
Make Your Own Dry Transfer Decals and Instant Printed Circuit Boards!
Thanks for comments , new and better pic's of A23 and A33 amplifiers .....
Regards ,Alex
Nice pic's, thanks.