100W Ultimate Fidelity Amplifier

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olafk

Member
Joined 2011
apexaudio said:
Nice work, with 1k trimpot you can set THD to minimum.
What is PSU for preamp?
Regards
Click to expand...
Hi, here is the sprint file and the circuit with numbered transistors. Maybe someone finds it useful.
The power supply in the picture from the previous post is a standard circuit with LM317 / 337. However, it must be replaced with one with a larger heat sink for stereo amplifier.

regards Olaf
 

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apexaudio

apexaudio

Member
Joined 2010
olafk said:
Hi, here is the sprint file and the circuit with numbered transistors. Maybe someone finds it useful.
The power supply in the picture from the previous post is a standard circuit with LM317 / 337. However, it must be replaced with one with a larger heat sink for stereo amplifier.

regards Olaf
Click to expand...

Thank you for this nice pcb, and thanks for made and test this circuit.
Regards
 
M

maxxaudio

Member
Joined 2014
Maybe i vas a litle late vith the tread but here is my AX-11, best amp in the world :)

attachment.php


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Transformer is recycled, 4x12V 8.6A from halogen light power supply, gives 2x36VDC after bridge, rectifier is simple, KBU806 and 4x4700uF per rail, vas transistors MJE340/350, drivers MJE15030/15031 and outputs 2SA1943/SC5200

Sound is great vay better than most comercial amps i have and better than LF55 that i was builded previously.

Thanks to Mile for help an cheers to all :cheers:
 

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apexaudio

apexaudio

Member
Joined 2010
maxxaudio said:
Maybe i vas a litle late vith the tread but here is my AX-11, best amp in the world :)


Transformer is recycled, 4x12V 8.6A from halogen light power supply, gives 2x36VDC after bridge, rectifier is simple, KBU806 and 4x4700uF per rail, vas transistors MJE340/350, drivers MJE15030/15031 and outputs 2SA1943/SC5200

Sound is great vay better than most comercial amps i have and better than LF55 that i was builded previously.

Thanks to Mile for help an cheers to all :cheers:
Click to expand...

Nice work.
Cheers
 
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C

chico67

Member
Joined 2016
Hi.
this is a stereo apex ax-14P that I've made recently.
It has very clear sound.
I've made very amp heretofore, but this one is one of the greatest amp that I've ever made.
but when amp clipping occurs, the relay goes to Continuous off/on that destroys the sound.
photo_2016-10-18_01-17-49.jpg

photo_2016-10-18_01-17-45.jpg

photo_2016-10-18_01-17-37.jpg

Best Regards.
 
Last edited:
still4given

still4given

Member
Joined 2004
apexaudio said:
Tone Control
Click to expand...

Hi Mile,

Thanks for the Tone control circuit. I am building an all APEX P30 preamp. Included will be the P30, MM3, A class PSU and this tone control circuit. I am not sure how the tone circuit and the volume control connect with the P30. DO you have a schematic showing where to integrate the tone circuit?

Thanks, Terry
 

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apexaudio

apexaudio

Member
Joined 2010
still4given said:
Hi Mile,

Thanks for the Tone control circuit. I am building an all APEX P30 preamp. Included will be the P30, MM3, A class PSU and this tone control circuit. I am not sure how the tone circuit and the volume control connect with the P30. DO you have a schematic showing where to integrate the tone circuit?

Thanks, Terry
Click to expand...

Nice work, connect tone control input to output of P30 input buffer and tone control output to volume pot input... A class PSU can not give current to supply all this circuits.
Regards
 
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