Quote:
Originally Posted by Username1
Dave is right that coil should have a peak, and if I remember right, you tune it for minimum cathode current.....
There should be a number in your manual....
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Well, about 200mA seems to be the generally accepted in the realm of this vintage of color television from what I can tell. Now, what I don't know is about what kind of peak I should be seeing with this measurement. First I want to say that I am using a Simpson 260 and I use the 50 volt scale. So unless there is a big variation that I would see here a difference in say 100mA isn't going to look like a lot of deflection of the pointer.
To be specific, the lowest point which was around 200mA is as low as it goes and it doesn't go way high from there. Now I have noticed that the slope is pretty sharp in that it doesn't take much of a turn to make the difference. Really, this is probably a good thing as I wouldn't think that you would want the potential for some way high, possibly damaging amount of current to flow, and of course if it were way to low there would be other issues.
My thoughts of possibly botching the install of the .15mfd cap look to be wrong. The schematic shows (as well as the old unit I removed) the cap across the two outermost terminals, and it is. So the only thing I think that I could botch would be mixing the conductors up, so I checked to make sure that #2 terminal which is a center tap, was connected to a .1mfd which it is. The other two leads I think could be swapped and it wouldn't matter since they are both across the 1 ohm winding.
I have a good raster which is linear both vertically and horizontally. The only battle right now is the hissing of I guess corona arc inside the HV cage which causes interference in the picture. I just know that flys are very critical with these sets and being transformers we all know that we don't want them running too hot, so I thought that I would try to get an idea of a reasonable temperature and HOPING that the arc or whatnot is not somehow internal to the fly if that is even possible. I am not familiar with the symptoms of shorts or other conditions that may occur with flys.