Project impossible? bringing a magnet-box back from the dead?

[Alex KL-1]

Originally Posted by Yamamaya42

Since I lost the chance to get the zenith television, I have decided to pull this project out of the shed and try to toss it together again.

It does work even though the CRT is weak and lacks contrast, but does get a bit better as it has been on a while.
It uses a 6EB8 for the video output / sync sep, looking on the sub chart, it;s said that a 6JT8 is a drop in compatible replacement, and on an audio site I saw... " Plenty of cheap tubes to choose from in that footprint, though - 6GN8, 6HF8, 6AW8 and more. 6LY8 and 6JT8 have more gain in the pentode section,"

And more gain in the pentode section may be just what this tired old CRT needs to limp along for a few more years of light use!

Feeding the CRT with strong signal will definitely helps and is worth but, if the signal surpasses the k-g1 bias (eg. a CRT with 60V cutoff and a 70Vpp signal) will make grid current, and the result is annoying bars at the side of contrasted objects like captions or subtitles, for example. Good to carefully adjusts the contrast.