100W Ultimate Fidelity Amplifier

[sajti]

Hi, Guys!
What changes should I make to this circuit when powered by +/-15V rail voltage?
View attachment 936978

Change the 47kohm to 33kohm.

Sajti

 

[Joel Wesseling]

What transistors are replacements for BC550 and BC560? many used for Apex, One P30Z has 13 of each.

 

[marin cornel]

What transistors are replacements for BC550 and BC560? many used for Apex, One P30Z has 13 of each.

BC546, BC547, BC548
BC556, BC557, BC558

 

[kandimba]

My contribution for APEX MM4.

 

[kandimba]

The Photo...

 

[thimios]

Thanks for sharing.
Is this a phono preamplifier?

 

[44250]

each Apex MM is - "moving magnet" and MC - "moving coil", depending of phono pick-up.

 

[kandimba]

Thanks for your words...🙂

 

[thimios]

each Apex MM is - "moving magnet" and MC - "moving coil", depending of phono pick-up.

Thanks!

 

[Joel Wesseling]

Apex P40 The correction lacked a couple of pins

Looks like the holes are not aligned. Trying to buy some PCB's for PCB Way and it failed the audit.. Hope you can help. Thanks for sharing.

 

[Joel Wesseling]

BC546, BC547, BC548
BC556, BC557, BC558

I'm know aware that they're all on the same data sheet.. Thanks!

 

[Vostro]

Joel if it's those extra "small" holes by the mounting holes. Just delete the smaller holes. They appear completely cosmetic. Or replace them with a single 3.2mm hole

 

[Joel Wesseling]

Thanks Vostro. I deleted that drill file and all is good.. One day I'll learn Gerber modification, just viewing them at this stage!

 

[Vostro]

I hope you still gave the drill files for the other holes for components

 

[Joel Wesseling]

Yeah, the important drill files are fine. Here is PCBWay image of the files with the one file removed.. Thanks!

 

[von Ah]

Hello friends.
I present to you the most muscular A40.
It took 2 years of work.

Apex A40 - Powerful monoblocks in bridge mode - Google Photos

Beautiful work and execution. The diffuse glow from the meters onto the sinks is fabulous.

 

[stuartmp]

Hi guys, I thought that you all might like to see some actual numbers of my Honey badger amplifier distortion tests. One at 1k and the other at 16K.

 

[ajaytanna]

Fantastic as always.
Would you be interested in making one with MUR1560s as well?
Thanks.

hello all,
I have made a crc psu with 35 amp rectifier with a provision for heatsink for high power amps or class A amps. it also has a primary side soft start with NTC.
pcb can be mounted on 10x10mm grid holed mounting plate.
Let me know if any one has any suggestions.

heatsink like this https://www.mouser.in/datasheet/2/2/Aavid_01112021_Board_Level_Cooling_Square_Basket_6-1953640.pdf
or
https://www.mouser.in/datasheet/2/596/TS-55250K-C1-R0-1487789.pdf
or
https://www.mouser.in/datasheet/2/433/intergrated-heatsink-wakefield-273031.pdf
or
https://www.mouser.in/datasheet/2/2/Aavid_01112021_Board_Level_Cooling_3747-1953585.pdf

 

[apexaudio]

AX11CS

 

[Gurpreet Turna]

Hello sir Mile , what is meaning of CS in a AX11CS.
CS mean current source or something else.
And what is advantage with dual OP-AMP. Please explain.
Regards