Dx Juan layouts ideas PCB

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sonal kunal

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Joined 2008
Just by adding pre driver Q17, Q18 MJE340 and MJE350 to AX-14P layout it will become AX-20P, schematic is almost identical minus pre driver.

AX-20 layout image for reference it has some mistakes IN4007 are reverse and base of Q17, Q18 are not connected.

Regards
Sonal Kunal
 

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  • Apex AX20 solder mask.jpg
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thimios

Member
Joined 2009
vargasmongo3435 said:
Hey thimios I'm back a placed the circuit on the simulation and yes it works but KTA1268 is not available on my simulation and I use 2SA954 instead also 2SD1857A is not on my simulation so I use BD139 I know this is only software simulation but at least it give an idea that the circuit works an it does work see images :)

I call this circuit " MONTARBO " is was name it on the image you send me :p let me know what is the real name later when you get a change man :)

Regards
Juan
Click to expand...
Ok Juan you can start the job now.:)
Apex answer is that T3(Vbe multip.)isn't on main heatshink.
 
vargasmongo3435

vargasmongo3435

Member
Joined 2011
sonal kunal said:
Just by adding pre driver Q17, Q18 MJE340 and MJE350 to AX-14P layout it will become AX-20P, schematic is almost identical minus pre driver.

AX-20 layout image for reference it has some mistakes IN4007 are reverse and base of Q17, Q18 are not connected.

Regards
Sonal Kunal
Click to expand...

hello sir :)

as you can see I already begin the project but give me some time to make sure all is correct I'm also working with another project so as soon is done I will post the PDF files so you can etched unless you don't want to wait I can send you the Sprint Layout file so you can modified the way you want it that is another option if you wish :)

I made a simulation and all seems to work good to 8 ohms load and sine wave of 1KHz 700mVp it give about @8 ohms 193W and the THD is really low according to the software 0.002% t@ 4 ohms load same setting it can give about 387W and THD of 0.002% of course that with 65V rails and also will depend of the power supply too this is just a "approximation" with the software maybe the results in real time might be different :)

I think we should post this on the correct section of mister Miles so all information will be there for other to see #1



Regards
Juan
 

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  • Apex AX-20P v1.0.jpg
    Apex AX-20P v1.0.jpg
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  • Apex AX-20 simulation 4 ohms.PNG
    Apex AX-20 simulation 4 ohms.PNG
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  • Apex AX-20 simulation.PNG
    Apex AX-20 simulation.PNG
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  • AX- 20.pdf
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Last edited:
vargasmongo3435

vargasmongo3435

Member
Joined 2011
Hello guys I haven't post for a while here and I have a new layout that I still working on it and is the A33 from Apex this one is double layer and I spend a lot of time making connections and it was not easy at all, to be honest this is my first double layer PCB and I will keep checking for errors just in case :)

Regards
Juan
 

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  • A33 R35 to 470Rss.jpg
    A33 R35 to 470Rss.jpg
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vargasmongo3435

vargasmongo3435

Member
Joined 2011
Hello guys I have not post anything for a while so I found this Quad 909 layout here on diyaudio really cool layout here is the

link #15 Quad 909 Clone

where a member name Kei post the image and from there I almost can say I made a clone of the layout really not so accurate but I'm getting there :)
 

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  • Quad 909 Juan.jpg
    Quad 909 Juan.jpg
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stuartmp

Member
Joined 2016
Paid Member
vargasmongo3435 said:
Hello guys I have not post anything for a while so I found this Quad 909 layout here on diyaudio really cool layout here is the

link #15 Quad 909 Clone

where a member name Kei post the image and from there I almost can say I made a clone of the layout really not so accurate but I'm getting there :)
Click to expand...
Nice work Juan. Glad you are still interested in Audio amplifiers.
 
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