100W Ultimate Fidelity Amplifier

[apexaudio]

Hi everyone!
I don't know the circuit A33 should match tran? Please show me
A17 100x65mm
I draw A17, please check error, thank you very much

Nice draw,
Regards

 

[olafk]

A14 Prototyp Board

Here we are.
Lots of errors eliminated and etched a prototype board (picture fresh from etching).

So we will see in the next few days if everything is correct.

regards Olaf

 

[44250]

you have just given us the way you draw pcb - second picture,lines on schematics and numbers related to each BD1xx transistor 🙂

very nice one more time-good luck with first plug-in! 🙂

 

[apexaudio]

Here we are.
Lots of errors eliminated and etched a prototype board (picture fresh from etching).

So we will see in the next few days if everything is correct.

regards Olaf

Nice work, replace 22R with 100R to reduce gain,
Regards

 

[Maroof]

Hi,
B80 schematics needed. Please.

 

[apexaudio]

Hi,
B80 schematics needed. Please.

B80 is same as AX12

 

[johndaf]

Hi a have a question about A33 i have a lot of 22r-10r and 47r resistors but they are 0.4 watt can i use them ?

 

[apexaudio]

Hi a have a question about A33 i have a lot of 22r-10r and 47r resistors but they are 0.4 watt can i use them ?

yes

 

[olafk]

you have just given us the way you draw pcb - second picture,lines on schematics and numbers related to each BD1xx transistor 🙂

very nice one more time-good luck with first plug-in! 🙂

Thanks and congratulations for your SR150 PCBs.
Looks really good!

regards Olaf

 

[olafk]

A14

Hi,

it sings! 😀
I had a stupid mistake. It took me a long time to find it.
But now it does.
The quiescent current is easy to adjust with the potentiometer. For the test, I chose 50mA. The offset is less than 2mV.
The sound is fantastic. An amplifier with which you can hear rock and dance and classical music equally well. Is simply fun.
Crisp and dry bass. Breezy Heights, very transparent and detailed. As always - the last built amplifier is the very best.

Tomorrow I will make the finished foils for etching.

regards
Olaf

 

[olafk]

Ok, it's already tomorrow ... (at least in Germany 🙂).
Here are the print files and a schematic with the changed values. The transistors are numbered. So they can be found better in layout

regards
Olaf

 

[apexaudio]

Hi,

it sings! 😀
I had a stupid mistake. It took me a long time to find it.
But now it does.
The quiescent current is easy to adjust with the potentiometer. For the test, I chose 50mA. The offset is less than 2mV.
The sound is fantastic. An amplifier with which you can hear rock and dance and classical music equally well. Is simply fun.
Crisp and dry bass. Breezy Heights, very transparent and detailed. As always - the last built amplifier is the very best.

Tomorrow I will make the finished foils for etching.

regards
Olaf

Nice work as usual, thanks for the files,
Regards

 

[johndaf]

yes

Thanks Mr Mile !!

And happy new year to everyone !!🙂

 

[apexaudio]

Olaf what is the potentiometer resistance for 50mA bias?
Regards

 

[pecedelfin]

if you can be added to the short-circuit protection on NE555 protection

 

[olafk]

Olaf what is the potentiometer resistance for 50mA bias?
Regards

Measured in the circuit around 22R.

Regards Olaf

 

[olafk]

Apex Galery

Last update for the Apex-Gallery (added A14 and found a old AX11 🙂). I needed the panorama function of camera 😀

I wish everyone a happy new year and enjoy DIY-Audio.

regards Olaf

 

[apexaudio]

Last update for the Apex-Gallery (added A14 and found a old AX11 🙂). I needed the panorama function of camera 😀

I wish everyone a happy new year and enjoy DIY-Audio.

regards Olaf

Thank you,
Regards

 

[olafk]

Sprint-File for A14.

regards Olaf

 

[thole]

Sprint-File for A14.

regards Olaf

hello olafk, which thread i can find your ax-20 sprint file layout?

Thank you,
Regards