100W Ultimate Fidelity Amplifier

[kiloz]

CA9 PCB

I'll make this one,
would the vbe multp. will work if they weren't place into main heatsink, sir?
thanks

 

[apexaudio]

Will work Apex CA9 Sound test after correction - YouTube

 

[kiloz]

yeah nice.. thank you, will update soon

 

[channini]

MM2R

not tested there could be errors

 

[apexaudio]

not tested there could be errors

Nice work, 1uF wrong size...

 

[apexaudio]

MM-1

Phono MM Preamp

 

[apexaudio]

MM PSU

 

[thimios]

Nice work, 1uF wrong size...

Black&white for home etching?

 

[apexaudio]

Black&white for home etching?

195x85mm

 

[thimios]

Thanks!
If it's possible parts ,parts numbers?

 

[Hicoco]

You must test preamp with amp connect to output, amp input impedance load preamp with 22k... P30ZF DC offset is very good for circuit without global negative feedback.
Regards

Yes, that is better with the amp connected to the preamp output, thanks Mile.
Gerbers attached
PS: i still have one spare available

 

[apexaudio]

MM PSU PCB

 

[smartx21]

15V out of 7X18?

 

[bullittstang]

15V out of 7X18?

It’s an error, should be 7815/7915, since a 12vac will only give you 16-17vdc.

 

[smartx21]

In this case, a voltage multiplier. I think you'll get some higher figures there.
https://www.electronics-tutorials.ws/blog/voltage-multiplier-circuit.html

 

[apexaudio]

15V out of 7X18?

You are right, output voltage is +/-18V.

 

[apexaudio]

It’s an error, should be 7815/7915, since a 12vac will only give you 16-17vdc.

Voltage multiplier give over +/-30V DC from single 12V AC.

 

[apexaudio]

MM PSU +/-18V DC from single 12V AC

 

[apexaudio]

MM30

Phono MM Preamp

 

[still4given]

What makes this better than the MM28?