Hi everyone,
Building the Aleph2 J from the attached schematic, i got a question about front end component values. Since my speakers have 3 low points of 3 Ohms and a max of 8 Ohms, i like to match the amp to this impedance.
Using the excel sheet, turned out a rail voltage of about 37V is fine with bias of around 0,67A the power output should be like 140W at 4Ohms. The rig runs a little slower, wont need that much power and produces less heat (i hope
the junction temp was fine too. (according excell sheet around 100-110C)
Do i have to change any values of components in the front end to compensate for this lower voltage rails? When yes, which parts?
(see schematic)
Thanks a bunch!
ps im designing the PCB's they are almost done and i might have a few spares if anyone is interested?
Building the Aleph2 J from the attached schematic, i got a question about front end component values. Since my speakers have 3 low points of 3 Ohms and a max of 8 Ohms, i like to match the amp to this impedance.
Using the excel sheet, turned out a rail voltage of about 37V is fine with bias of around 0,67A the power output should be like 140W at 4Ohms. The rig runs a little slower, wont need that much power and produces less heat (i hope
the junction temp was fine too. (according excell sheet around 100-110C)
Do i have to change any values of components in the front end to compensate for this lower voltage rails? When yes, which parts?
(see schematic)
Thanks a bunch!
ps im designing the PCB's they are almost done and i might have a few spares if anyone is interested?
Attachments
Thanks Zen Master! I can start ordering the parts soon. just double checking packages, pads, etc.
The schematic i got from audio4fun
Decided on the Aleph 2, what psu should I build?
regards,
Jeroen
The schematic i got from audio4fun
Decided on the Aleph 2, what psu should I build?
regards,
Jeroen
Hi Zen mod en Vitalica,
I searched on the schematic and found this original one, which has the C9 on the output line? Now im confused as you can see.
Also there aint a zener over the transistor in the original.
Can you explain please what difference it does do here?
Thanks.
I searched on the schematic and found this original one, which has the C9 on the output line? Now im confused as you can see.
Also there aint a zener over the transistor in the original.
Can you explain please what difference it does do here?
Thanks.
Attachments
Cleaned up the board, according updated schematic. when all components are in house im gonna final check drillholes and dimensions so no surprises when soldering.
Im gonna open a build thread when time is there.
Thanks again for your help sofar!
Regards,
Jeroen
Im gonna open a build thread when time is there.
Thanks again for your help sofar!
Regards,
Jeroen
Attachments
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