Retro Amp 50W Single Supply

[apexaudio]

Which one you preferred?

Nice work, I suggest 22k pot instead 12k resistor for simetry adjust not 470k pot.
Regards

 

[apexaudio]

Thread Rating: 3 votes, 3.33 average 🙂

 

[wiljj78]

Nice work, I suggest 22k pot instead 12k resistor for simetry adjust not 470k pot.
Regards

Ok... you mean like this?

 

[apexaudio]

Ok... you mean like this?

This is ok, but I don't want use trim pots.

 

[wiljj78]

This is ok, but I don't want use trim pots.

Ok so you want me to remove the 22K pot or let's keep it as an optional for some diy freinds?

 

[apexaudio]

Ok so you want me to remove the 22K pot or let's keep it as an optional for some diy freinds?

Let's keep it as an optional for some diy freinds 🙂

 

[wiljj78]

Let's keep it as an optional for some diy freinds 🙂

Cool! Will post the files shortly.....

 

[wiljj78]

Here's the file for APEX AX-6 Rev. 1.4.
Regards,

 

[TonyTecson]

Here's the file for APEX AX-6 Rev. 1.4.
Regards,

thanks Willy, bourns trimpots are tops and allows for output symmetry and bias adjustments, i would use no other types...

 

[apexaudio]

Willy 10uF polarity reverted.

 

[wiljj78]

Willy 10uF polarity reverted.

Good catch Mr. Mile Thank you... will correct that shortly.

 

[wiljj78]

Willy 10uF polarity reverted.

Ok here's the corrected one....
Regards,

 

[apexaudio]

Bias 20-50mA can't be set with 50R pot, you need 220R pot to set 120-150R for proper bias current.

 

[TonyTecson]

^what i have in mind is more bias than that...😎

 

[apexaudio]

^what i have in mind is more bias than that...😎

It's a minimum value to remove crossover distortions, use more if you have large heatsinks 🙂

 

[apexaudio]

Willy please correct 10uF polarity on this pcb also 25mm diametar caps will be nice 🙂

 

[LazaKamikaza]

What is the recommended trafo that i would need to use, with 2N3055? (srednja skola i nije mi neki budzet 😀)

 

[apexaudio]

What is the recommended trafo that i would need to use, with 2N3055? (srednja skola i nije mi neki budzet 😀)

2x36vac 75VA for mono 150VA for stereo.

 

[wiljj78]

Willy please correct 10uF polarity on this pcb also 25mm diametar caps will be nice 🙂

Ok here's the corrected 10uF polarity ver.1.6 using 25mm caps.
Regards,

 

[lyubcho88]

Hi All,

Here is my pcb version on AX6 amplifier circuit with TO246 package power transistors.
https://www.dropbox.com/s/kz2m72offvtio1g/Board_TO246.GIF
PCB for print
https://www.dropbox.com/s/plh3ma156q8g0ug/AX6%20rev_1_6_TO246_PCB_PRINT.pdf
Schematic and Simulation
https://www.dropbox.com/s/f4c109ep479b6aw/sch1.png
https://www.dropbox.com/s/suvoupxhxv0yqtf/sch2.png
https://www.dropbox.com/s/szavhehgng9uhxh/sch3.png

The trimmers on bias and offset are these - https://www.dropbox.com/s/fk05m8ruosaaq9w/SH655MCL _trimers.pdf or Bourns

BR,
Lyubo