Punk
Nice catch. I am trying to remember when the Tri-focus aka EFL CRT
was used. IIRC it started in the H-line, my father got one. It was an
oval shaped 19" & one knob tuner. That would have had the upright
steel chassis with major changes to the vert & added a CRT module.
Also had plug in focus control on tripler. Dont know when it ended,
the chassis was last used on some of the K-line.
73 Zeno
