Looks likely I can run a partial test on NTSC, I have found the appropriate crystal deep in the odd box, and I have the possible loan of a multi monitor, it is rather old but if it still works it will do NTSC.

I have found the original picbasic files on the web, and that compiles fine for 16F628a. The only thing I have to change are the port numbers to suit my pic/sstv board, all operations will be unchanged.

I do not have a NTSC source, so it would not be a full test, but if text appears, then that should at least prove the NTSC side is working.

It will be a few days before I get the chance to do this.

In the meantime please post if you get your board working on NTSC.