100W Ultimate Fidelity Amplifier

[rehman]

hellow every one. i have built an ax14. when i switched on there where negative voltage at output due to d4. i corrected the d4 but still 4.5 volt at output. the circuit works but no clear sound

 

[yoosefheidari]

hellow every one. i have built an ax14. when i switched on there where negative voltage at output due to d4. i corrected the d4 but still 4.5 volt at output. the circuit works but no clear sound

connect power supply gnd to SGND of circuit

 

[rehman]

connect power supply gnd to SGND of circuit

thanks for helping me. everything is working now but it is not finished yet. it is my first bjt based amplifier with bias pot and i don't know much of it. how can i adjust bias pot. can i use a preamp other than tb3 for ax 14

 

[yoosefheidari]

thanks for helping me. everything is working now but it is not finished yet. it is my first bjt based amplifier with bias pot and i don't know much of it. how can i adjust bias pot. can i use a preamp other than tb3 for ax 14

you should adjust pot to set 15mv on 0.33 ohm resistor and then your circuit is biased
you can use any preamp for ax14

 

[I love the sound]

Hi! what is the maximum input for ax11? 1.5V ? Thanks!

 

[apexaudio]

Hi! what is the maximum input for ax11? 1.5V ? Thanks!

2,5V

 

[rehman]

hello:confused everyone,, is it necessary to use regulated psu for ax14 and which preamp is suitable for ax 14.

 

[yoosefheidari]

hello:confused everyone,, is it necessary to use regulated psu for ax14 and which preamp is suitable for ax 14.

if you use a more regulated psu you can have a better sound.
every preamp like ne5532 you can use

 

[DevilDrums]

Good afternoon Dear! Please help with the excitement of A33.

On the board there are 2 pieces 470 pf and 2 22pf -in the pre-exit cascade, but the meander shows that there is excitement.


With respect

photo by reference Япикс

 

[rehman]

hello every one,, Do any one have a schematic for short circuit protection of amplifier's speaker output

 

[muz1ca]

you can help me with the bias adjustment on these amplifiers 20190221-133714 — imgbb.com

20190221-133658 — imgbb.com

 

[I love the sound]

2,5V

Thanks Mr. Mile

 

[44250]

you can help me with the bias adjustment on these amplifiers 20190221-133714 — imgbb.com

20190221-133658 — imgbb.com

bias transistor should be mounted on a same heatsink with output transistors and driver transistors. mounted as it is now it will not work because bias transistor can not detect heat from heatsink. start with that...

 

[muz1ca89]

https://i.imgur.com/q1koumg.jpg I mounted the radiator but it does not heat up anything. The only transistor that heats up is mje350

 

[rehman]

hello every one, i have a question, can i use p30 with ax 14?

 

[shabusf]

Hi Mile,
I would like to build a sub-woofer amp for my A40 setup. Could you please suggest a simple design for handling low frequency. My requirement is to have 200 watts into 8 Ohms. May I use AX14 with 3 output pair? Or anyother simple ones?
Please advise.

Thank you.
Sha

 

[apexaudio]

Hi Mile,
I would like to build a sub-woofer amp for my A40 setup. Could you please suggest a simple design for handling low frequency. My requirement is to have 200 watts into 8 Ohms. May I use AX14 with 3 output pair? Or anyother simple ones?
Please advise.

Thank you.
Sha

Use HX11

 

[sonal kunal]

https://i.imgur.com/q1koumg.jpg I mounted the radiator but it does not heat up anything. The only transistor that heats up is mje350

Change 1K5 resistor near BD140 to 2K2 or 2K7 then adjust bias.

 

[muz1ca89]

in the schematic is bd139 not bd140 thanks for the help

 

[sonal kunal]

in the schematic is bd139 not bd140 thanks for the help

Ohh! sorry careless mistake.