100W Ultimate Fidelity Amplifier

[wiljj78]

My AX-20 in action....

 

[wiljj78]

looking good buddy

Regards
Juan

Thanks bro...

 

[vargasmongo3435]

My AX-20 in action....

is that the BIAS or the output dear Willie ?

Regards
Juan

 

[wiljj78]

is that the BIAS dear Willie ?

Regards
Juan

That's the DC Offset dear Juan when replaced bc547 to 2n5551 and bc557 to 2n5401, BIAS was set on 15mV and im getting around 35mV across R47.

Regards,
Willy

 

[vargasmongo3435]

Nooop... That's an Offset i've got when replaced bc547 to 2n5551 and bc557 to 2n5401, BIAS was set on 15mV and im getting around 35mV across R47.

Regards,
Willy

ohhhh ok sorry bro I thought that was 15V output I know it can produce even more than that I was just curious

Regards
Juan

 

[wiljj78]

ohhhh ok sorry bro I thought that was 15V output I know it can produce even more than that I was just curious

Regards
Juan

Noooo... i'ts ok bro no need to sorry, my next step is to play the offset target point to zero, just having fun of my apex collection....

 

[vargasmongo3435]

I would like to see you make a video of what you doing your work is really nice man

Regards
Juan

 

[apexaudio]

My AX-20 in action....

Nice work,
Regards

 

[wiljj78]

Nice work,
Regards

Thanks...

 

[wiljj78]

Mr. Mile,

Why this AX-20 amp when i apply +/-78vdc it gives 73VDC on output, but when i apply back to +/-38vdc the amp works perfect and it gives 18mV offset on output, what is the possible cause of that high DC offset when applied +/-78V?

Regards,

 

[wiljj78]

I would like to see you make a video of what you doing your work is really nice man

Regards
Juan

Hehehe i will try bro...

Thanks...

 

[vargasmongo3435]

Hehehe i will try bro...

Thanks...

Is a good thing you show on video plus it will help other builders too, and you are one of the best layout designer here show your laboratory mine is too tiny jejeje

and I don't have much to show this is all tools I use and I don't feel shame and I'm happy with what I got


Regards
Juan

 

[suryadi5417]

My AX-20 in action....

Another nice pcb ....

 

[jaagut]

My AX-20 in action....

nice dual in line layout! good work sis!

 

[apexaudio]

Mr. Mile,

Why this AX-20 amp when i apply +/-78vdc it gives 73VDC on output, but when i apply back to +/-38vdc the amp works perfect and it gives 18mV offset on output, what is the possible cause of that high DC offset when applied +/-78V?

Regards,

There must be some mistake on your amp... VAS used for AX amplifiers can work with +/-100V rail voltage.
Regards

 

[wiljj78]

There must be some mistake on your amp... VAS used for AX amplifiers can work with +/-100V rail voltage.
Regards

You mean without changes VAS can handle +/- 100VDC rail?? Please confirm...

Thanks...

Regards,

 

[apexaudio]

You mean without changes VAS can handle +/- 100VDC rail?? Please confirm...

Thanks...

Regards,

Yes, I use it in H900 with +/-120V rail.
Regards

 

[wiljj78]

Yes, I use it in H900 with +/-120V rail.
Regards

Really!! Thats nice... then i have to revise it and restore as per ariginal recommended parts in schematic.
Many thanks for the reply and support.
Regards,

 

[albertli]

sound comparison

Mr. Miles, Willy and all,
I only finished the AX11 and I love it.
You guys keep building all different models. Is it possible to put up a list of your own and tell which one you like the best.
Regards
Albert

 

[apexaudio]

Mr. Miles, Willy and all,
I only finished the AX11 and I love it.
You guys keep building all different models. Is it possible to put up a list of your own and tell which one you like the best.
Regards
Albert

SR200 is next step,
Regards