My Brand New CTC-7!

[SwizzyMan]

Ok just won the auction for those alignment tools. I will take a stab at it when they arrive!

[old_coot88]

Phil,
Not to be a fuddyduddy but I would heartily recommend against sticking anything into an adjustment slug other than the prescribed tool. The slugs are sooo fragile and easy to bust.

[Phil Nelson]

Good point. They made special tools for a reason (sometimes more than one).

Phil Nelson

[DaveWM]

a video would be a good idea of what you have now. Show some reg color programing and adjust the fine tuning from smear to wormey

before touching any coils you really need to eliminate all other possible issues. diddle stick drift is the worst thing to deal with.

based on the video it should be determined that the color osc is running and or synced properly. color killer is also an issue. There is a lot that cause the color circuits to not work right, coils adjustment would be the last place to look, esp if the osc is not running or is WAY off. any tweeks would be minor UNLESS someone has gotten into it (the reference to diddle stick drift).

of all the color sets I have worked on with respect to coil adjustments, the most that was required was a 1/4 turn on coil in the osc circuit (rare). Most of the time it was a dirty pin/weak tube/cap/pot issue. Its aways best to start with the obvious and easy. fine tuning and signal 1st, Tubes in chroma, wiring from controls, the pots themselves, settings of color killer.

To the others that are helping, I am pretty sure the OP has not touched any of the now suspect film caps in the chroma circuits.

[Phil Nelson]

Originally Posted by DaveWM

I am pretty sure the OP has not touched any of the now suspect film caps in the chroma circuits.

Aha. Yes, start with the obvious. After I recapped my CTC-7, including chroma circuits, it looked so good that I did not mess with any of the color setup. Sometimes it's better to let sleeping dogs lie.

Phil Nelson

[SwizzyMan]

Is the chroma located in the underside portion of the chassis? Because I don't see it as a board.

[Phil Nelson]

Under. Note the yellow and orange caps in this photo of my CTC-7:



The pile of "brown drops" and one bumblebee show what I replaced.

The full CTC-7 restoration article is at http://antiqueradio.org/RCACTC-7ColorTelevision.htm .

Phil Nelson