LINEAR 190-107476 XMTR 639T 318 BXD

hi I'm mark from the North Shore commercial door comm today we're going to talk about a transmitter and this transmitter is made by Lanier corporation and it it's it's part number one nine zero one zero seven four seven six it's also known as a six thirty ninety reason it has two part numbers is this is a very old transmitter this could be as far back as forty five years ago and it was originally just known as a six thirty ninety they added that one ninety number about the turn of the century so when you're when you're looking for these and trying to understand him you'll see them with both of those numbers so that's that's why I'm giving you both numbers now when you get it's gonna come in a nice little brown cardboard box we're gonna open this up while we look and see what's inside all right here's transmitter this is a this is pretty complicated or sophisticated transmitter in that i