[PortugalTV]

touching the antenna input should give you intereference on the speaker. if you wish you can inject direct composite video from a dvd into the grid of the video amp tube. just inject the signal directly and the composite ground you connect it to the chassis, just be carefull with electric shock on the dvd player's metal case. you can also inject direct audio on the volume control , the procedure is the same. you should have perfect audio and video and you can check and adjust everything beafore you start tackling the possible IF and tuner issues.

i have made myself some tube socket test adaptors with leads sticking out and the pin numbers marked on them... they are very usefull for testing, maybe you can considering doing the same if you plan on working on that set or other sets often