Double image in Crosley 9-408

[stuben]

I have finished re capping this set which is an RCA 8 TS30 clone. I have replaced all electrolytic and paper/wax capacitors only. I have not touched any of the ceramic or mica caps.
I’m getting a picture after adjusting the horizontal frequency control on the back of the set, however it’s unstable and jittery in addition to the double image which is in the vertical plane, one above the other. I loose sync when turning the picture control too far clockwise. I can try and post some pictures if necessary.
Thanks in advance for any suggestions!

[old_tv_nut]

If you have two complete images squeezed vertically, the vertical frequency is half the normal rate.

If you have only the lower half on top and the upper half on the bottom, it's a sync problem.

Pictures are helpful if you can post some.

[stuben]

Originally Posted by old_tv_nut

If you have two complete images squeezed vertically, the vertical frequency is half the normal rate.

If you have only the lower half on top and the upper half on the bottom, it's a sync problem.

Pictures are helpful if you can post some.

Thank you very much! Looks like I have a sync problem. I will take an in depth look into the first sync amp which is a 6SK7, the 6SH7 sync separator and the 6SN7 the second sync amp. As I recall there’s a few mica caps here and some high value resistors in the bias supply. It’s a very difficult area to work on so should keep me busy for some time!

[Electronic M]

Originally Posted by old_tv_nut

If you have two complete images squeezed vertically, the vertical frequency is half the normal rate.

If you have only the lower half on top and the upper half on the bottom, it's a sync problem.

Pictures are helpful if you can post some.

It's not always a sync problem... sometimes it's the frequency at double the normal rate at least if the bottom half and top half of the image both fill the screen and overlap each other nearly completely...I had that years ago on a Zenith with bumble bee caps that instead of learning to read I replaced based on Sam's info which contained typos. If you can carefully adjust the vertical hold and get a single image that wants to roll in either direction and won't hold lock for more than a second then it's definitely a sync problem.

[Yamamaya42]

Perhaps your TV is really into Foreigner!

[stuben]

Originally Posted by Yamamaya42

Perhaps your TV is really into Foreigner!