hello friends plz help me in post #1755
Would you please refine your question?
That capacitor looks to be some sort of ground lift. Maybe someone can explain its behavior in this circuit.
pay attention
No need for any capacitors.
Almost all apex amplifiers are to be connected as on next picture:
(the SGND (signal ground) from pcb goes to input conector and from input conector it goes to power GND . that is how it goes for both(all) chanels in amplifier chases,each for it self. this is a scheme for AX12 but the same principle is used in (almost) all other APEX amplifier wireing)
hello sir I made AX-14 amp
Is I should connect 0.1uf capacitor from power supply ground to input ground
An externally hosted image should be here but it was not working when we last tested it.
No need for any capacitors.
Almost all apex amplifiers are to be connected as on next picture:
(the SGND (signal ground) from pcb goes to input conector and from input conector it goes to power GND . that is how it goes for both(all) chanels in amplifier chases,each for it self. this is a scheme for AX12 but the same principle is used in (almost) all other APEX amplifier wireing)
Attachments
Nazir,
follow the circuit schematic. It tells you the voltage at the base of the -IN transistor.
Look at the emitter of the +IN transistor.
Follow the DC current route through to Signal Ground (SG).
From this route all the current flows in the same direction from emitter to SG.
The emitter and every component MUST be +ve with respect to SG.
Now look at the base of the +IN and compare it to the base of -IN.
Thye voltages at these two bases should be IDENTICAL if the two transistors are IDENTICAL.
The base of +IN MUST be +ve with respect to SG.
Learn to read the schematic !!!!!!! READ !!!!!
Or C6 is incorrect. But I think we have discussed this many times in the past and because there is very little voltage across C6 it doesn't really matter. I would like to see it corrected so it can become an accurate reference for future builders.
Andrew, I think Nazir may be able to read schematics that is why he is asking for it to be checked. 😀
No need for any capacitors.
Almost all apex amplifiers are to be connected as on next picture:
(the SGND (signal ground) from pcb goes to input conector and from input conector it goes to power GND . that is how it goes for both(all) chanels in amplifier chases,each for it self. this is a scheme for AX12 but the same principle is used in (almost) all other APEX amplifier wireing)
thank you sir can u suggest any bass treble board for ax-14
need pcb help
My ID audisoul@yahoo.in
Hi alex please send me pcb design of this project........ I have from now a huge colection of Apex amplifier schematics and ofcourse many PCB's designed....... and another one 🙂
Alex.
My ID audisoul@yahoo.in
Hello,
I'm thinkig about building an AX14 amp. Any advice on how to drive it with a balanced source? can i feed a balanced signal to the differential pair in the first stage?
I'm thinkig about building an AX14 amp. Any advice on how to drive it with a balanced source? can i feed a balanced signal to the differential pair in the first stage?
Mr. Mile,
NTC 10K is not available in my place, what are the recommended value can be use instead of 10K??
Regards,
Willj78
Use 10k resistor instead 10k NTC.
Regards
Use 10k resistor instead 10k NTC.
Regards
Thats Great!!! Many thanks Mr. Mile.....
Regards,
Hi Mr Mile,
Since I found this thread, I never understood why the AX17 style never got its own thread.
I'm currently using your SR200 as my home amplifier, and Im so happy with it.
Using these as speakers, with active sub.
Boston Acoustics A26 review from the experts at whathifi.com
But I still like to build and learn more 🙂
So I've build my own design Lin type and I continue to tinker with it, But the SR200 has more clarity in very highs and more balanced sound.
I've always liked Yamaha amplifiers and was going to reverse one, but thought why? when you already shared the magic AX14.
So Im going to build the AX14 with your original PCB posted, so I can compare the 'sound' of that type of design.
But the AX17 is different,
Can you please tell me, how You experience the difference in sound between AX14 and AX17.
Thanks
Since I found this thread, I never understood why the AX17 style never got its own thread.
I'm currently using your SR200 as my home amplifier, and Im so happy with it.
Using these as speakers, with active sub.
Boston Acoustics A26 review from the experts at whathifi.com
But I still like to build and learn more 🙂
So I've build my own design Lin type and I continue to tinker with it, But the SR200 has more clarity in very highs and more balanced sound.
I've always liked Yamaha amplifiers and was going to reverse one, but thought why? when you already shared the magic AX14.
So Im going to build the AX14 with your original PCB posted, so I can compare the 'sound' of that type of design.
But the AX17 is different,
Can you please tell me, how You experience the difference in sound between AX14 and AX17.
Thanks
Attachments
Hi Mr Mile,
Since I found this thread, I never understood why the AX17 style never got its own thread.
I'm currently using your SR200 as my home amplifier, and Im so happy with it.
Using these as speakers, with active sub.
Boston Acoustics A26 review from the experts at whathifi.com
But I still like to build and learn more 🙂
So I've build my own design Lin type and I continue to tinker with it, But the SR200 has more clarity in very highs and more balanced sound.
I've always liked Yamaha amplifiers and was going to reverse one, but thought why? when you already shared the magic AX14.
So Im going to build the AX14 with your original PCB posted, so I can compare the 'sound' of that type of design.
But the AX17 is different,
Can you please tell me, how You experience the difference in sound between AX14 and AX17.
Thanks
This thread is about 100W hi-fi amplifier and I will share another topology soon, it's will be completly different but it still be 100W without DC servo.
I start too many threads already and I don't want new for any new circuit.
Regards
APEX Protect using NE555
Mr. Mile,
This Protect works perfect for my needs, pcb is very small, compact and very useful.
Thank you very much for sharing...
Regards,
Wiljj78
Mr. Mile,
This Protect works perfect for my needs, pcb is very small, compact and very useful.
Thank you very much for sharing...
Regards,
Wiljj78
Attachments
Last edited:
Mr. Mile,
This Protect works perfect for my needs, pcb is very small, compact and very useful.
Thank you very much for sharing...
Regards,
Wiljj78
Nice work,
Regards
Mr. Mile,
This gonna be my next project to follow, please let me know if you found an error.
Thanks...
Regards,
hi how many watts it can give in 8ohms
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