Television 1960s 23" Weltblick 511TR

[Retro-guy]

Okay I did some searching

I think I have A CONDITION CALLED blooming which causes the raster to expand by 10 % if I turn the brightness up,loses focus in middle to,which it does and is caused by poorly regulated EHT ??

Also when I clunk thru the channels the dim spot goes away and the tube is flashing very bright so I know its a good tube,which means either poorly regulated EHT,B+ maybe...someone mentioned to me that
the B+ that goes to vertical deflection,that the fault might be there ??

Which means if poor regulated EHT ,would cause the tube to not operate at its fullest and I could have a much brighter tube if the things driving it would work properly :d

Originally Posted by Electronic M

If that boost cap is on the damper tube, then it's value effects the horizontal width and HV....It was a common trick on American sets to add extra capacitance by putting another capacitor in parallel to increase width when the H sweep tubes were running low on usable life.

I just tried it with a 68.000 pf cap which is more then enough in the place of the 56.000 pf but results are pretty much same ...