100W Ultimate Fidelity Amplifier

[apexaudio]

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

 

[wattaniya]

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]

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]

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

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

 

[apexaudio]

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]

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]

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

sir I have adjsd 60mA bias

 

[apexaudio]

sir I have adjsd 60mA bias

60mA bias is OK

 

[shravanth]

hello sir plz share amp using 3773

 

[apexaudio]

hello sir plz share amp using 3773

Amp using 3773 you can find in thread: http://www.diyaudio.com/forums/solid-state/167394-quasi-amplifier-beginners.html

 

[shravanth]

thank u sir

 

[shravanth]

hello apex sir I have made stereo AX-14 and using with 35-0-35Vac / 250VA transformer.

in one board I am getting more sound and in another board I am getting low sound

what to do? sir. .

 

[44250]

compare voltages at working and non-working channel,when you find drastic diference take a closer look at nearby parts and their values. no one can help you from distance not knowing even close where you could have done a mistake. usually it is misplaced part,it's value or position...

 

[shravanth]

D1 on D14 schematic reverted polarity! This is right polarity.

hello apex sir which will be good amp either AX-14 or D14 for 3 way tower speakers

 

[shravanth]

compare voltages at working and non-working channel,when you find drastic diference take a closer look at nearby parts and their values. no one can help you from distance not knowing even close where you could have done a mistake. usually it is misplaced part,it's value or position...

oh.. that mistake is misplaced part that's it . .

 

[wattaniya]

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

hi apex sir, i am back,
i did what u suggest.( increase 1k to 1k5), now i can increase the bias voltage,
i set 10mv for emitter resistor, now perfectly working, (power , signal ,clip leds) perfectly working. i will post images when my camera back from my friend.

 

[wiljj78]

hi apex sir, i am back,
i did what u suggest.( increase 1k to 1k5), now i can increase the bias voltage,
i set 10mv for emitter resistor, now perfectly working, (power , signal ,clip leds) perfectly working. i will post images when my camera back from my friend.

Can you post PCB and component layout?

Regards,

 

[44250]

diyAudio

diyAudio

http://www.diyaudio.com/forums/soli...imate-fidelity-amplifier-173.html#post3282768

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