I have that Farnsworth tv.got it back in 1981 and got it working with a quik replacement of a vert cct cap.i need to recap it one day. YouTube's of the last time I ran it. A 651p model from approx 1948.
https://www.youtube.com/watch?v=9EKBFUSVHF4 https://www.youtube.com/watch?v=PR8JU9uhi78&app=desktop