100W Ultimate Fidelity Amplifier

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#11,141
Apex A40 Playing

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No tone or preamp right now. Would be adding NE5532 based preamp soon. I shall upgrade it to P30 later 🙂

Pending work: Preamp, softstart, TB3 tone control

Thank to Mr. Apex, Alex MM, Prasi, Sumesh, Sunny, Bhushan, And everyone who have helped me either directly or indirectly.

Regards,
Sha
 
#11,144
TP2 preamp
 

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#11,154
P30 preamp, volume pot help

Hi Mr. Mile,
As per the P30 scheme volume pot is 100K. Is that a LOG or LIN pot?
Also, I do have a 10K LOG pot, shall I use it with P30 without any modifications to the scheme?

I have added NE5532 based preamp and TB3 to my A40, but the results were not satisfactory, sounds like the preamp degrades the audio. So I am planning to make P30.

Thank you.

Regards,
Sha
 
#11,155
shabusf said:
Hi Mr. Mile,
As per the P30 scheme volume pot is 100K. Is that a LOG or LIN pot?
Also, I do have a 10K LOG pot, shall I use it with P30 without any modifications to the scheme?

I have added NE5532 based preamp and TB3 to my A40, but the results were not satisfactory, sounds like the preamp degrades the audio. So I am planning to make P30.

Thank you.

Regards,
Sha
Click to expand...

You can use 10K LOG pot with P30 without any modifications to the scheme.
 
#11,160
Hello Sir Apex, I would like to build the AX11 amplifier. Can you re-publish the latest PCB version, diagram and list of amplifier components?
I found some options in the forum (BD249C / BD250C or 2sc5200 or 2sa1943) but I have some difficulty and choose the appropriate, I have little experience and this will be my first amplifier.

Thank you very much in advance.
 
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