Hi everyone,
I've been working on a program to transmit video with the HackRF, which I unimaginatively called HackTV. It can transmit the usual 625 line modes but it can also transmit 405 line TV (without sound at the moment). I don't have any real 405 line hardware to test this on and I'm curious if it works.
The program lives at:
https://github.com/fsphil/hacktv
It was primarily developed for Linux, but I believe it can also be built on a Mac.