My Brand New CTC-7!

[roundscreen]

You have been running your set to repair it. So I think it should be ok. What I do when working on a set is put my hand on the fly back tire to feel how warm it is getting. If it feels warmer than the power transformer, Shut the set down. If you do this make sure you discharge the hi voltage first. You have had to discharge the hi voltage before to remove the chassis, But still be careful.

[old_coot88]

Originally Posted by SwizzyMan

Would this one work? Secondary out is 10v so If I buck it the output will be 110v right? Or is that too low or am I wrong about my theory? http://www.skycraftsurplus.com/f6-10...vct120pri.aspx

Since the secondary is center-tapped (5V either side of center), you can use half the winding for 5V of bucking if you wish.

[SwizzyMan]

Alright will do. One thing I've noticed that my horizontal hold is very bad when I first turn the set on but then 5 minutes later it gets stable. What is going on?

[SwizzyMan]

What about the ampereage? That one runs at 3 amps is that ok?

[roundscreen]

Originally Posted by SwizzyMan

Alright will do. One thing I've noticed that my horizontal hold is very bad when I first turn the set on but then 5 minutes later it gets stable. What is going on?

Replace the 6cg7 and see if that helps

[SwizzyMan]

Replaced it twice once with another RCA used one I had that didn't work so then I put a Nos sylvania tube in and still no luck. Horizontal has been a big problem since the beginning. Is the high line voltage causing this?

[roundscreen]

The best I can tell you is I have never seen high line voltage cause a drift problem.
Take your volt meter and measure the heater voltage. Is it 6 volts?

[SwizzyMan]

I have no idea how to measure vacuum tube voltages... Can I use my DMM?

[roundscreen]

Yes you can use the dmm and Set it to ac volts.

[SwizzyMan]

OK just felt the donut/tire portion of the flyback warm but not even remotely close to the heat of the power transformer. But when I get to the middle where the tire gets to the support it gets a little hotter.

[roundscreen]

Originally Posted by SwizzyMan

OK just felt the donut/tire portion of the flyback warm but not even remotely close to the heat of the power transformer. But when I get to the middle where the tire gets to the support it gets a little hotter.

Good. that is not to bad. How long has the set been on?

[SwizzyMan]

About 45 minutes.

[roundscreen]

Just keep an eye on it and no more that a hour at a time. Do you see any melted wax in the cage?

[SwizzyMan]

No more than an hour at a time with cooling fans? And decreased line volts? Absolutely no wax drippage what so ever the flyback looks beautiful.

[roundscreen]

Your set is doing good. When you get the line voltage where it belongs, You should be able to run it as long as you like.