100W Ultimate Fidelity Amplifier

[alex mm]

My dummy load

.... you can do something like this , 12 resistors 22 ohms / 50W wired series and parallel for 7R8 ohms and 600 W heatsinked if you has money to spend on it .
Regards ,Alex

 

[Zinyx]

alex, this is the best solution, and pour cement

 

[vedmitraa]

dummy loads

Real heavy duty Dummy loads

 

[vargasmongo3435]

let me guess vedmitraa, uhmmm let me see, more than 800 watts perhaps?

Regards
vargasmongo3435

 

[mihailo]

Apex AX-14 power amp, and Apex stereo preamp. Finally comleted.

 

[mihailo]

Apex A class shunt regulator for preamp also comleted. but have some problems with it. When connect 2x15V on input, I get on output +/-18V and there are no changes, even when I'm turning 4K7 bourns. Can someone you help me, please?

 

[44250]

You should check transistors if they are at their places. As i can remember there are many BC556-546 and others with similar marks and close placed-you might made a mistake there. I have built it,and it works just fine-after few years i have checked it and voltage was just as i left it last time: +/-15V.

 

[44250]

And yes,your APEXes are looking just great!

 

[wattaniya]

hi apex sir,
can u tell me what is the value of the resistors i marked in red arrow.

 

[apexaudio]

hi apex sir,
can u tell me what is the value of the resistors i marked in red arrow.

Use 560R resistors.

 

[apexaudio]

Apex AX-14 power amp, and Apex stereo preamp. Finally comleted.

Nice work.

 

[wattaniya]

Use 560R resistors.

is it 560r resistor same value for all series resistors? or different value to one by one for series resistor?

 

[wiljj78]

hi apex sir,
can u tell me what is the value of the resistors i marked in red arrow.

Hello nazirdigi,

What program did you used to make your pcb design?

Regards,

 

[wattaniya]

i am using adobe illustrator.

 

[wiljj78]

i am using adobe illustrator.

Thanks...

 

[wattaniya]

hi apex sir,
is this correct sir?

 

[apexaudio]

is it 560r resistor same value for all series resistors? or different value to one by one for series resistor?

Yes, all resistors are 560 ohms.

 

[apexaudio]

Apex A class shunt regulator for preamp also comleted. but have some problems with it. When connect 2x15V on input, I get on output +/-18V and there are no changes, even when I'm turning 4K7 bourns. Can someone you help me, please?

About this PSU post to thread http://www.diyaudio.com/forums/power-supplies/164365-class-preamp-psu-5.html
Regards

 

[wattaniya]

hi apex sir,
i finished the vu meter,left side with 21 leds -right side with 21 leds. its very high resolution vu meter, but when i increase the volume to high, the top 4 leds not lightning, including the clipping led also not lightning. where will be the problem?

tomorrow i will post the pictures.

 

[wiljj78]

NE555 Protect Terminal

Mr. Miles,

Is this Terminal Protect will work with AX-14??