Italian 1962 TV B&W

[Sparky]

That 1nF would be more in line with the proper value. I am curious what is the the signal looking like (P-P) on the plate of the 15TP7 and the cathode of the CRT? Also, could you post a clearer picture of the video section as I cannot read the fine print. One area in question is the left section of the 16TP8. Does it say blanking driver?

Originally Posted by lucvic

Hi,
in last week end no time to work on this,
but this evening I found two things:

1) R557 increased from 5.6Meg to 27Meg ( tomorrow I will change)
2) someone in the past changed C549 (cathode of final video amplifier)
from 470pF to 100uF. I don't have one, I put a 1nF but the contrast in the
screen is very reduced compared to the 100uF.

In attach the pic of the signals at grid of video amplifier (TP5)
and node between F902 and K112.

I hope tomorrow I will get more news.

bye