100W Ultimate Fidelity Amplifier

[kriengim]

reduced by two transistors and now it is A38 - used Olaf´s files from earlier done A14 and A33 - so it has all rights to be called Olaf´s and accommodated by me:

(!!!IT MUST BE CHECKED!!!)

Do you have files pdf.
Tkank you
kriengim

 

[johndaf]

Mr Alex mm on your A33 pcb i am working on you have two outs and you use two 4K7/3W resistors one with a capacitor and one with a Copper coil for the zobel net if i am correct . Do i have to put both of the resistors and which out should i use ?

 

[still4given]

Mr Alex mm on your A33 pcb i am working on you have two outs and you use two 4K7/3W resistors one with a capacitor and one with a Copper coil for the zobel net if i am correct . Do i have to put both of the resistors and which out should i use ?

The 4R7 in the inductor is part of a Thiele network and the 4R7 on the right is in series with 100n cap as a zobel.

 

[johndaf]

Thanks Mr Terry so any output i use is the same ?

 

[alex mm]

Yes ,you can use any of this outputs .......🙂
Alex

 

[johndaf]

Thanks 😉 !!

 

[apexaudio]

P30

CFA Preamplifier

 

[AndrewT]

30 transistors for a volume control !

 

[apexaudio]

30 transistors for a volume control !

Buffer, volume and gain.

 

[thole]

CFA Preamplifier

Min & max voltage???

Thanks
Revard

 

[apexaudio]

Min & max voltage???

Thanks
Revard

+/-24V rail voltage, 300mV input 2V output,
Regards

 

[Karl vd Berg]

Buffer, volume and gain.

Well, interesting...

 

[apexaudio]

MM22

Phono MM preamp.

 

[sajti]

Well, interesting...

It sounds great, if You use carefully selected parts. If not, only one OPA2134 will easily outperform it...

Sajti

 

[sajti]

CFA Preamplifier

Just one note: I would use 10-22k potentiometer instead of the 100k. It gives better sound.

Sajti

 

[sajti]

Phono MM preamp.

I see that You found some Marantz schematics 😉

Sajti

 

[apexaudio]

I see that You found some Marantz schematics 😉

Sajti

CFA with diamond input buffer must be similar.
Regards

 

[apexaudio]

Simple stereo protect + PCB

 

[apexaudio]

Just one note: I would use 10-22k potentiometer instead of the 100k. It gives better sound.

Sajti

If amp no need gain only buffer can be use.

 

[still4given]

Thanks Mr Terry so any output i use is the same ?

I suppose Alex would know best with his layout but it appears to me that the output terminal on the left takes advantage of the inductor and the one on the right does not. I will be using the one on the left.