Class-AB meets Class-D: Yamaha's EEEngine Topology - where are this Diy Projects?

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waso

Member
Joined 2010
I've done simulations of Yamaha 7000D in Multisim12. Very nice works on low-and meddle frequences. But on 10...20kHz it works no good - tracker has no time to track signal. Power transistors was overheated, because tracker works envelope of signal, not snapshots of signal.
Situation can be corrected with raise of tracker self-generation frequency, by default it's about 10...15 kHz. It's not enouth for correct tracking of waveform.
 
andrewlebon

andrewlebon

R.I.P.
Joined 2008
YAMAHA HD 5000

Hello
greetings yamaha HD class ee engine is being cloned and sold by many in thailand my unfinished HD class its no secret any more and not so hard to DIY
warm regards
Andrew Lebon;)
 

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waso

Member
Joined 2010
I will be happy if my work will be useful.
PCB in Sprint-Layout 5 format
Scheme in S-Plan 7.0 format
Some items may not be signed, in this case refer to the original scheme.
Symmetrical input & 2nd order low-pass filter was skipped in scheme. It's easy :)
 

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  • Yama D7000W.zip
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andrewlebon

andrewlebon

R.I.P.
Joined 2008
HD CLASS

Hi Waso
greetings the modified XP7000 schematic you posted negative step side PLEASE can you compare it with negative step of detex audio detex audio positive step is working but deetex audio negative side step not working also
in detex audio negative side step one transistor is missing compared to xp7000
your xp 7000 and detex audio positive side matches exactly components to schematic PLEASEif its possible see detex audio negative side step
warm regards
Andrew:confused:
 

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ppnoraseng

Member
Joined 2008
waso said:
I've done simulations of Yamaha 7000D in Multisim12. Very nice works on low-and meddle frequences. But on 10...20kHz it works no good - tracker has no time to track signal. Power transistors was overheated, because tracker works envelope of signal, not snapshots of signal.
Situation can be corrected with raise of tracker self-generation frequency, by default it's about 10...15 kHz. It's not enouth for correct tracking of waveform.
Click to expand...

Hello can you share the p7000 in multisim files. I am very interest to the respond of amp in 10 to 15kz
My email is pnoraseng@yahoo.com
 
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