sir mile here's another try of D200.2 with T130-2 core material with 62 turns of AWG#16 magnetic wire (only available wire) but same problem occured please advice
the PSU used was capable of 1KW +/-70VDC
the AMP DC out was too high when amp reaches 20VAC and up on output.
regards
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hi there sir,
to me i considered myself too late to make this amp so its difficult to ask some help, regarding your question on resistor loading. YES i tried both ways even tried to replace those IC's and trannies but same problem.
there was always a big cracking sound and big DC offset that strikes at higher volume. i even tried T130-2 but same problem.
i had work at the other town several weeks so i haven't replied.
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Sir, I've been quite busy in the past weeks and now I started looking with more interest to the D4K5 amplifier. Do you have any advice for the core? Possibly one that could replace the T157-2 used in the video and that could be found on mouser or digikey, so the shipping doesn't cost me as much as a complete amplifier 
.
BTW thank you for other advices, I didn't notice them
.BTW thank you for other advices, I didn't notice them
Hi everyone , finally got around in making an APEX d200.1 board,and reading other peoples problems and taking note of helpfull info without trying to ask the same questions. ...................its alive ............output is at 240khz and idling at 10mv with supply of +/-45 vdc.It helped me understand CLASS D alot L.O.L. it looks abit untidy. Going to clean it up and post a photo in the sence of D.I.Y. later this week
Air gap was made using a fat mica insulator,i haven't a micrometer
Hello thimios.
Can you give me please more information about this inductor?
I have a lot of this ETD29 cores, N87 and 3C90 and because since that i have no one -2 material ring core then it would be great if I could try my first class D with this ferrite core.
Which is wire diameter and how many turns?
hi there
have you checked your 12 volt source for 2110 .try using tip 41,mje13005,c5027 or similar bjt instead of 640n....
regards
Good night.
I did the assembly and could not make it work. Can you help me?
Thank you.
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what happened when you connect with rails ?
did you check somethings with scope ?
Oscillating start ?
where did you buy the parts ?
when fake parts, it can be it not work
I have stop and change to this amp
UcD Xlite Fullbridge PCB and Schematic
when you want similar D200 look D4K5 in google
you can download with gerber and contruction video
long time no see mr miles, there is alot of people problem here when playing with switching amp, mostly big trouble is output inductor, no meter... means you are in trouble, wrong core, unknown material etc... no scope to see what freq you are running with, signal etc.. when you change fets, you need to see all of fet details, dv/dt, rds on, ns nc and so on, all of that will cause your circuit may change depends on what mosfet ur using, this class D is really not for beginner, mr miles contribute alot of time so we thanks to him. i made this amp since 2012, i made 3 of them, none of mine got problem until now, works well, we need equipment for class D amp, its not like another class you are not playing with switching..
best regards to all of you, stay at home, stay away from corona.
Hello Mr miles and all
i have lots of iron powder cores t130-10(black core) , retrieved from old big power supply. how many turns do I need to turn to use them in this amp, also do I need to cut a gap in the core ?
I plan to use with irfb42227 +/-75vlts at 2ohms load
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