RCA CTC-5 "Wescott" restoration

[bandersen]

I finally wrapped up work on the chassis and replaced a few bad tubes.




I used all RCA branded tubes.


I quickly noted a few tubes were not lighting up. One of the 5U4s died and a couple of the PCBs were not making good ground contact.

Once that was sorted out, I was able to receive clear audio through the tuner.


Time to put it in the cabinet and makes some x-rays.
That gizmo on the right side monitors the horizontal output tube current.


I was first treated to a pulsating out of focus image and some high pitched ringing.


I realized this set was really loading down my variac and turned it up to get about 117 going in.
Image got brighter and more focused. HOT current at about 150mA


Feeding a color bar test pattern resulted in this. Hor. frequency was way off.


Needed to go about 7 full rotations on the hor. frequency control.
Set is much happier now. No more ringing and the image is sharper.


Convergence needs a bit of work ��