My Brand New CTC-7!

[SwizzyMan]

Let me hook up my converter box and see if it is any different there.

[DaveWM]

Originally Posted by SwizzyMan

Should I try adjusting L704 just to see if I can get any color or should I leave that until I get my tuning problem fixed?

I know you really want to do that so go ahead, give it a try. Can't hurt, just remember that it should have an instant effect, and don't turn more than 1/2 either way. I put a little flag made from tape on the top of the tool to help keep track of how much I turn. if no help put it back to the starting point.

but you should return to getting the fine tuning to work as it should even if you get the color to work.

[SwizzyMan]

OK hooked up the set to the converter box which is output on channel 3. Dont lose sync at all only lose the color bars when I turn all the way ccw

[DaveWM]

ok mess with that L704 and see if you can get the color. remember note how far and no more that 1/2 and look for instant changes in number of bars adj to fewer bars until lock assuming they are instantly effected.

I suspect the AGC may need to be adjusted. but that can be done later.

[SwizzyMan]

OK adjusted L704 nothing... Bars got brighter when I turned and when I turned back they got dimmer. I see shango066 had the same problem and it took him 3 turns until he got color.

[DaveWM]

will have to think about that. are you sure the color bar generator is working right? try adj while using a different source.

[SwizzyMan]

Tried with converter box no luck.

[DaveWM]

ok I will have to take a break and think about it.

what happens if you remove the 6U8? do the rainbow bars go away?

that's the color osc tube.

[SwizzyMan]

Yes bars disappear.

[dtvmcdonald]

Yes, you can try L704, if it really is L704 and nothing else. I should
have warned you not to turn T704, but a half turn is not a lot.

As said before, if you are not in lock, which you are not, L704 should
change the pattern a lot with just a tiny adjustment. If it does not,
that's not the problem. If it does, change it in the direction of fewer bars
like you see. At some point, not a whole turn away from where it is,
it should lock rock solid. If it does not, turn back to where you
started, as the problem is surely elsewhere. You seem to have 4 bars or so, so it is very close.

[SwizzyMan]

would messing with T704 again help?

[DaveWM]

check voltages pin 1 and 8 of the 6u8 V707A tube, check with no signal.

[SwizzyMan]

I dont have a vtvm... Maybe I did turn T704 more than half a turn but I thought I didnt.

[SwizzyMan]

If I did adjust T704 too far how would I get it back to where it needs to be?

[DaveWM]

are you sure you were on L704 and not L702?