I've a DIP I scavenged from a old receiver but I cannot find a datasheet that's why I've to ask a question about its manufacturer but I don't know on which site I should ask the question. I've tried to look for a appropriate site https://stackexchange.com/sites# but cannot find any.
The Electrical Engineering site is the one you are looking for. It's for:
Electrical Engineering: For electronics and electrical engineering professionals, students, and enthusiasts.
The link to the site is here: https://electronics.stackexchange.com/