I was curious what was said about the TDA7850, but I didn't like the layout of those cheap kits around.
So I designed my own PCB, fully symmetrical.
PCB size matches the Fischer SK08-100 extrusion heatsink (100x88mm).
And I am using the H version of the chip.
Works first time. No lack of power or bass slamp.
Decent sound for the simplicity. Just for fun.
Cheers,
Patrick
So I designed my own PCB, fully symmetrical.
PCB size matches the Fischer SK08-100 extrusion heatsink (100x88mm).
And I am using the H version of the chip.
Works first time. No lack of power or bass slamp.
Decent sound for the simplicity. Just for fun.
Cheers,
Patrick
Attachments
Sound check :
"2 channels driving stacked quads, very basic 14.5V linear supply driving it.
Stays cool all the time, very clean pure sound and deep bass.
Very pleasant indeed! "
Says the auditioner.
Not bad for a 10-bucks car amp chip.
Patrick
"2 channels driving stacked quads, very basic 14.5V linear supply driving it.
Stays cool all the time, very clean pure sound and deep bass.
Very pleasant indeed! "
Says the auditioner.
Not bad for a 10-bucks car amp chip.
Patrick
The next level of faking ?
Just to find out, I ordered a TDA7560 from a EU ebay dealer with 99.9% feedback.
He had sold 34 pieces of them and was asking for 5€ a piece.
On arrival everything looked fine, the chip has proper ST laser marking and everything.
The legs were unsoldered and all intact.
But the top surface was quite dusty and a bit sticky.
So I tried clean that up with PCB cleaner.
Surprise, surprise, a thick layer of black paint / ink came off.
All the laser marking disappeared with this black paint.
And the epoxy encapsulation underneath has no marking whatsoever.
For 5€, I am not going to risk and put it on a PCB to try out.
Amazing,
Patrick
Just to find out, I ordered a TDA7560 from a EU ebay dealer with 99.9% feedback.
He had sold 34 pieces of them and was asking for 5€ a piece.
On arrival everything looked fine, the chip has proper ST laser marking and everything.
The legs were unsoldered and all intact.
But the top surface was quite dusty and a bit sticky.
So I tried clean that up with PCB cleaner.
Surprise, surprise, a thick layer of black paint / ink came off.
All the laser marking disappeared with this black paint.
And the epoxy encapsulation underneath has no marking whatsoever.
For 5€, I am not going to risk and put it on a PCB to try out.
Amazing,
Patrick
