900W H-class PA Amp with Limiter

h900.jpg

out16pares.jpg

NSL32 not connected. Influences?
Tested with four pairs of transistors in the outputs. nothing has changed. only decreased potency.
Much movement of the speaker, a little bass.
I called the Direct +-HV transistor. Nothing has changed as a bass.
4 18 inch speakers 8 homs. quality bass sound bad.
Help me please to solve this problem?
 
high definition
An externally hosted image should be here but it was not working when we last tested it.

I mean please post your schematic too, only pcb layout is to less

A amplifier is very complex thing

Can your software compare pcb routing with schematic for faults in pcb design?

Im using free pcb layout software with projekt proof, software compare layout tracks with schematic for faults in routing


but I dont have built H900 yet because very satisfied with NMOS

have built QUASI (power amp under development) NMOS300/500 ....is working since long time with 100V DC like hell and bass like earthquake

ok very hot but will try to add class H step driver in future
 
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pcb software

Can your software compare pcb routing with schematic for faults in pcb design?

Im using free pcb layout software with projekt proof, software compare layout tracks with schematic for faults in routing
hi Nmos
greetings can you please tell the name of software which compare pcb
routing with software
thanking you
andrew lebon
 
Can your software compare pcb routing with schematic for faults in pcb design?

Im using free pcb layout software with projekt proof, software compare layout tracks with schematic for faults in routing
hi Nmos
greetings can you please tell the name of software which compare pcb
routing with software
thanking you
andrew lebon


TARGET have free 400 PIN Version V14

you can download new 250 PIN Verion V15 for free

includung autorouter ....

http://www.ibfriedrich.com/http://www.ibfriedrich.com/

englisch - French - German

have fun
 
I mean please post your schematic too, only pcb layout is to less

A amplifier is very complex thing

Can your software compare pcb routing with schematic for faults in pcb design?

Im using free pcb layout software with projekt proof, software compare layout tracks with schematic for faults in routing


but I dont have built H900 yet because very satisfied with NMOS

have built QUASI (power amp under development) NMOS300/500 ....is working since long time with 100V DC like hell and bass like earthquake

ok very hot but will try to add class H step driver in future
pcb routing checked with the original. No failure! h900 is for serious hard bass?
 

Attachments

  • NMOS Balanced CLASS H Schematic.pdf
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only workhorse know's the magic of n-channel with step:D

NAD 208 is working N channel with step some bipolar N designs too


cant see benefit for BJTs output stage for high output power

.... it can more cost effective in mass production

about 0,50 $ pcs. for 2sC5200 and 2SA1943

compare to power mosfet about 1 $ pcs.

second breakdown is high risk, Did see failure burning up output stage against second breakdown very often

often sounds mosfet output stage better, you can driving pushing harder and more rugged

bjts no thanks
 
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