SYMEF amplifier

[OnAudio]

Originally Posted by carlmart

I think the 2200uF NFB capacitor is a total exaggeration, and could certainly be reduced to a value where even film types could be used, like 80uF or so. Don't you think so?

The input cap probably too, to even smaller values.

Hi Carlmart,

It depends on where you want to cut your low high frequency roll off ........Adjust to your tastes

Thanks.

[OnAudio]

There are those that wanted this mod

[alex mm]

....... first PCB for SYMEF rev1.0
Alex.

[tinitus]

thats a good looking board

regarding onboard supply caps

what happens with those thin ground lines when output draws current ?

[alex mm]

.....thanks, supply caps are the second filter ,and those thin lines can handle 6.2 Amps each ,as shown in pic below.
Alex.

[OnAudio]

Originally Posted by alex mm

....... first PCB for SYMEF rev1.0
Alex.

Thanks Alex, that was fast .

[tinitus]

I have nothing against the output devices
but they will need 90degr angled alu profile

which will never be a smooth fit to heatsink
heat transfer will be compromised

apart from the other difficulties of drilling, mounting, pads, etc etc

[alex mm]

..... and second PCB rev 1.1 for same schematic ...... output transistors can also be connected with wires without problems
Alex.

[OnAudio]

Originally Posted by tinitus

I have nothing against the output devices
but they will need 90degr angled alu profile

which will never be a smooth fit to heatsink
heat transfer will be compromised

apart from the other difficulties of drilling, mounting, pads, etc etc

Hi Titinus,

I did checkout a few devices but these ones showed a superior performance

[OnAudio]

Originally Posted by alex mm

..... and second PCB rev 1.1 for same schematic ...... output transistors can also be connected with wires without problems
Alex.

Nice Job again Alex. You will love this amplifier