100W Ultimate Fidelity Amplifier

[wiljj78]

I think its only DC protect, better to check with Mile to confirm.

 

[apexaudio]

I like the performance of this protect, but it works only in rails supply up to 40VAC.
What are the changes if i want to use separate 18-0-18 up to 24-0-24 VAC in order to use in higher rails power amp?

On 560R/2W you have voltage drop to get 24V on relay coil, with 18-0-18 use short circuit instead 560R/2W and 5,6V zener instead 15V, with 24-0-24 use 20-50R instead 560R/2W, with rails up to 40vac use about 1k/5W instead 560R/2W (you must change resistor value to get 24v on relay coil). GND from separate protect psu must be conect to main gnd.
Regards

 

[apexaudio]

I think its only DC protect, better to check with Mile to confirm.

There is overload protect (short circuit) if you conect PRO pin to emiter of NPN output transistor in positive rail.

 

[apexaudio]

Hi Wiljj78
greetings does this protector have SHORT CIRCUIT protection
warm regards
Andrew

Yes there is short circuit protection if you conect PRO to emiter of NPN output trasistor.
Regards

 

[wiljj78]

On 560R/2W you have voltage drop to get 24V on relay coil, with 18-0-18 use short circuit instead 560R/2W and 5,6V zener instead 15V, with 24-0-24 use 20-50R instead 560R/2W, with rails up to 40vac use about 1k/5W instead 560R/2W (you must change resistor value to get 24v on relay coil). GND from separate protect psu must be conect to main gnd.
Regards

Thanks for the info Mr. Mile...
Regards,

 

[thimios]

I like the performance of this protect, but it works only in rails supply up to 40VAC.
What are the changes if i want to use separate 18-0-18 up to 24-0-24 VAC in order to use in higher rails power amp?

Can you post this pcb?

 

[alex mm]

No, wrong connection .....
Regards,Alex

 

[thimios]

Oh big mistake!
Wrong schematic deleted.
Thanks Alex.

 

[wiljj78]

Can you post this pcb?

Here you are...

 

[andrewlebon]

Hello Apex Audio
greetings and thanks for confirming about short circuit protection #4664
your DC servo mosfet power supply which has short circuit protection works
great at high and low volume.
warm regards
Andrew

 

[thimios]

Here you are...

Thanks !
If i remember correctly you have another version based on 555 i.c.
If it so can you post this, or give the post number?

 

[rombe570]

Hello, I finally made both chanels on apex ax 14 work. Now it needs a bigger transformer an a housing.

Thanks Mr. Apex for sharig your schematic.

 

[jmora]

hola q tal amigos de esta prestigiosa pagina soy aficionado a los amplificadores y me gustaria si me pueden hacer el favor de colaborarme con el esquema y pcb de apex A14 EL TRAE UN IC 071

 

[planet10]

Hi q such friends of this prestigious product I am fond of amplifiers and I would like if I can you please colaborarme with scheme and apex pcb A14 THE BRING A IC 071

English please



dave

 

[still4given]

4 fit nicely on a 4" x 6" board.

 

[44250]

you are a machine, taking a lead from Olaf! 🙂

 

[suryadi5417]

Does anyone have PA protector ? Not the speaker protector, i mean if the speaker get SHORT / BURN first the PA will safe...

Regards.

 

[apexaudio]

Does anyone have PA protector ? Not the speaker protector, i mean if the speaker get SHORT / BURN first the PA will safe...

Regards.

There is protect with NE555 (DC, thermal, overload and start delay)
Regards

 

[wiljj78]

Thanks !
If i remember correctly you have another version based on 555 i.c.
If it so can you post this, or give the post number?

 

[wiljj78]

Mr. Mile,
What's the changes if I will use AX14 with 80-0-80 VDC rails using 3 pairs A1216/C2922 SANKEN transistor?
Thanks,