1951 Zenith 16" Porthole

[Radiotronman]

My hv probe somehow broke so I don't know the voltage. It doesn't bloom when the hv is turned up. The CRT tested bad, but so did my other 16" and it was very watchable. There are a couple more electrolytics I still need to replace because I sinehiw didn't order them with the rest of the cap order. The people brightness is turned all of the way up in the picture.

[Radiotronman]

I also tried adjusting the ion trap, it's in the brightness position also.

[John Marinello]

Well, you could do what the old-timers used to do... pull the anode & see how
much of an arc you can pull... About an inch, you should be fine.

[Radiotronman]

I ordered the remaining caps I needed to finish the recap, so I can move forward and address any low hv issues.

[Radiotronman]

A friend gave me another 16gp4 to put in this set and now I have a nice bright raster. I have sync issues to fix, but most importantly the left side of the screen is dim. Anyone know what is causing this. The ion trap in its current position is its brightest place. I can get a picture in the left side, but obviously night as bright as the right. Any thoughts?

[Radiotronman]

Is the set with video.

[EdKozk2]

Originally Posted by Radiotronman

A friend gave me another 16gp4 to put in this set and now I have a nice bright raster. I have sync issues to fix, but most importantly the left side of the screen is dim. Anyone know what is causing this. The ion trap in its current position is its brightest place. I can get a picture in the left side, but obviously night as bright as the right. Any thoughts?

I may be wrong, but one time I got an image like yours and it was because I had the ion trap and focus coil/ magnet in the wrong place with respect to each other. It could also be AC getting into the DC at the CRT. Reminds me of old time video scrambling. Did you finish the recap?
Ed

[Radiotronman]

Yes, I finished the recap. Not sure what to make of it or to do. This set us so close to being done.

[John Marinello]

Originally Posted by Radiotronman

A friend gave me another 16gp4 to put in this set and now I have a nice bright raster. I have sync issues to fix, but most importantly the left side of the screen is dim. Anyone know what is causing this. The ion trap in its current position is its brightest place. I can get a picture in the left side, but obviously night as bright as the right. Any thoughts?

Try adjusting the centering control... it's that tab thingy between the focus coil
and the yoke.

[Radiotronman]

I tried that control too and it didn't correct the issue. Good thought but I already tried it...thanks.