Hello to all,
I am quite familiar with National Semiconductor overture series of amplifiers and also have quite some experience with it, I have developed pcb's
for a couple Ic's of that series LM3875, LM3876 also LM3886 and others.
But here I would like to learn something about the SK3875, I have removed this IC from an old Sony receiver so the part is genuine, the part does
feature the old Logo from National Semiconductor but the reference part number start with "SK" and also use the case of TO-3PF from popular
Sanken device like 2SC5100 also does have an SK label inside the small circle on the lower part of it.
Does anyone have some info on this, is this exactly the same internal circuit diagram of LM3875 why this variant?
If you want to check my work with this kind of parts you can check it here:
https://www.ebay.de/usr/rocksandsound
Regards