100W Ultimate Fidelity Amplifier

[engel dela pena]

sir mile,
how about the ultimate fidelity with more power output?4 pair,
can you share this pcb?

 

[momon]

mr mile,this is my 1st project with ax14 and I have problem with sound when volume turn 90' is over?I use 35v volt + - and also I try change Resistor gain from 22k with 47k but same,sorry my english.

An externally hosted image should be here but it was not working when we last tested it.

 

[apexaudio]

mr mile,this is my 1st project with ax14 and I have problem with sound when volume turn 90' is over?I use 35v volt + - and also I try change Resistor gain from 22k with 47k but same,sorry my english.

An externally hosted image should be here but it was not working when we last tested it.

I can't see picture...

 

[momon]

ax14

this is mr.mile

 

[apexaudio]

this is mr.mile

I need more informations, and clear picture from both sides of pcb...

 

[momon]

sorry mr,my picture not clear because i use webcam

 

[momon]

mr,can I change r18 and r19 with 120 ohm if voltage just 35v + -?

 

[noobie]

Apex Sir, can i change the output of NX14 to NPN channel transistor? If, how?

 

[Hardstyle Fan]

Hi Apexaudio,
Can you please post the PSU in the classic version (2SA1943, 2SC5200 upright) in pdf, schematic + pcb.

Thanks

 

[apexaudio]

Apex Sir, can i change the output of NX14 to NPN channel transistor? If, how?

Try schematic from post #345.

 

[apexaudio]

Hi Apexaudio,
Can you please post the PSU in the classic version (2SA1943, 2SC5200 upright) in pdf, schematic + pcb.

Thanks

Pdf for PSU you can find here: http://www.diyaudio.com/forums/solid-state/173462-studio-reference-amplifier-9.html in post #84.
Regards

 

[apexaudio]

mr,can I change r18 and r19 with 120 ohm if voltage just 35v + -?

Yes, and if you have overload problem replace R11 (22k) with 11k, with 47k you have to much gain.

 

[vlasinalin]

PNP quasi version

Hello everyone, please help me to modify this APEX AX14 scheme into a PNP quasi one ( I have two PNP power transistors for the final stage). Thanks!!

 

[vorezky04]

sorry mr,my picture not clear because i use webcam

Mr. Mile, my project of AX14 was finished but i don't know how adjust a VR 1k ohm. So please give me a tutor and next for a instalation and meauserment AX14.

Thanx mr. Sorry my english is bad...

Regrad

 

[vorezky04]

Mr. Mile, my project of AX14 was finished but i don't know how adjust a VR 1k ohm. So please give me a tutor and next for a instalation and meauserment AX14.

Thanx mr. Sorry my english is bad...

Regrad

And how place of zobel network..


Please a tutor from a picture mr....

 

[electra_ina]

usualy..zobel network placed on binding post out power in box...
Regards

 

[carlsburg]

i wonder where is apex now, its been a while since his last post.

got a question: if i parallel lets say 3 pairs of outputs on this ax-14, do i need to put 1n4007 diodes on collector-emitter of the other pairs? and 4.7k resistor connected to emitter of driver and base of outputs also of the other pair?? any idea?

Thanks

 

[AndrewT]

I will take a guess and suggest he has got tired of all the inquiries from potential builders who were attracted solely by the High Power advertised for his range of amplifiers.

 

[vorezky04]

IN4007 near final transistor must be removed...

 

[carlsburg]

IN4007 near final transistor must be removed...

im a bit confused, because if you look at the parts layout on pcb, the diode is placed before the .33 ohm resistor. thats why im thinking if i will be putting another diode to another output pair. by the way what is the job of the 2 1n4007 diode there?

can you post some pics of your ax-14 project with 2 or more outputs.
thanks