100W Ultimate Fidelity Amplifier - Page 11

apexaudio · 7th May 2010, 07:55 PM

Quote:

Originally Posted by a.wayne

Apex , what is the lowest operating voltage for your circuit.. Could this be operated at 32V ?

+/-24V DC is the lowest operating voltage, if you have +/-32V DC you can use this amp but power will be about 40W on 8R load.
Regards

apexaudio · 11th May 2010, 09:08 PM

Ultimate Fidelity with more power.

electra_ina · 12th May 2010, 06:12 AM

Quote:

Originally Posted by apexaudio

Ultimate Fidelity with more power.

Hi..Apex...It's..PA H750 or H900 on another thread? Or difference PA??

Pozdrav

apexaudio · 12th May 2010, 08:37 AM

Quote:

Originally Posted by electra_ina

Hi..Apex...It's..PA H750 or H900 on another thread? Or difference PA??

Pozdrav

H750 is older version of H900 without limiter and bridge circuit, rest is almost same. H1200 is different, and use VAS from this amplifier.
Pozdrav

apexaudio · 20th May 2010, 08:04 AM

H1200 use same VAS as AX14, but output stage is triple darlington.

electra_ina · 20th May 2010, 09:23 AM

Quote:

Originally Posted by apexaudio

H1200 use same VAS as AX14, but output stage is triple darlington.

Like what schema H1200??
I hope Mr. Apex will sharing this project for DIYers...

Regards

maouna · 20th May 2010, 06:20 PM

apex ,if i dont want to use the overcurrent protection ,can i just not solder the corresponding parts or there are other modifications i must have i mind?

apexaudio · 20th May 2010, 08:08 PM

Quote:

Originally Posted by maouna

apex ,if i dont want to use the overcurrent protection ,can i just not solder the corresponding parts or there are other modifications i must have i mind?

Just shorted 0R1/5W, but I can't see reason to not use short-circuit protection,
Regards

maouna · 20th May 2010, 09:32 PM

in fact i want to use a 35 Ampere bridge rectifier and it doesnt fit, the 8A bridge you suggest may not be adequate enough and will propably get quite hot so i think of not using the short circuit protection and not place any of its components ,and in that space i put the biggest bridge rectifier .
i have placed all the components so far and i will continue tommorow..

apexaudio · 20th May 2010, 09:39 PM

Quote:

Originally Posted by maouna

in fact i want to use a 35 Ampere bridge rectifier and it doesnt fit, the 8A bridge you suggest may not be adequate enough and will propably get quite hot so i think of not using the short circuit protection and not place any of its components ,and in that space i put the biggest bridge rectifier .
i have placed all the components so far and i will continue tommorow..

You can put bridge rectifier out of pcb, and connect it with wires,
Regards

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20th May 2010, 06:20 PM	#107
maouna diyAudio Member Join Date: Oct 2008	apex ,if i dont want to use the overcurrent protection ,can i just not solder the corresponding parts or there are other modifications i must have i mind?

20th May 2010, 09:32 PM	#109
maouna diyAudio Member Join Date: Oct 2008	in fact i want to use a 35 Ampere bridge rectifier and it doesnt fit, the 8A bridge you suggest may not be adequate enough and will propably get quite hot so i think of not using the short circuit protection and not place any of its components ,and in that space i put the biggest bridge rectifier . i have placed all the components so far and i will continue tommorow..