100W Ultimate Fidelity Amplifier

[apexaudio]

Originally Posted by DAMANHURI

thanks to APEX and Jhon Bali for PCB design. AX14 I use Protect from B500. I prefer character AX14 for my home.

Nice work,
Regards

[shravanth]

hello sir can any share amplifier bridging circuit

[nazirdigi]

hi apex sir,
i finished ax20 with 4pair , supply voltage 50vdc, with 10 ohm 10w resistor with rail instead fuse ,when i adjust the 1k preset to clockwise maximum 200mv is showing ,
cant adjust to 2vdc any suggestions.
i try with 2pairs also but same thing.

[Arif Budiyanto]

Originally Posted by DAMANHURI

thanks to APEX and Jhon Bali for PCB design. AX14 I use Protect from B500. I prefer character AX14 for my home.

Finally, your AX14 is now singing...Congratulation friend....

[DAMANHURI]

Originally Posted by Arif Budiyanto

Finally, your AX14 is now singing...Congratulation friend....

Thanks mas Arif , thanks to APEX and friends all are willing to help in all

[apexaudio]

Originally Posted by nazirdigi

hi apex sir,
i finished ax20 with 4pair , supply voltage 50vdc, with 10 ohm 10w resistor with rail instead fuse ,when i adjust the 1k preset to clockwise maximum 200mv is showing ,
cant adjust to 2vdc any suggestions.
i try with 2pairs also but same thing.

Increase resistor value from 1k to 1k5 in Vbe multiplayer from base to colector of BD139.

[shravanth]

what is the bias current for AX-14

I am using 35-0-35VAC transfoermer

[apexaudio]

Originally Posted by shravanth

what is the bias current for AX-14

I am using 35-0-35VAC transfoermer

Set 15-20mV on 0R33/5W (about 50mA bias)

[shravanth]

Originally Posted by apexaudio

Set 15-20mV on 0R33/5W (about 50mA bias)

sir I have adjsd 60mA bias

[apexaudio]

Originally Posted by shravanth

sir I have adjsd 60mA bias

60mA bias is OK