Quote:
Originally Posted by Tomcomm
Wayne....Very good cross-hatch conversion except for the blue horizontal sagging uniformly at both sides like there was no horizontal correction at all? If you disconnect the horz coil leads you should move the entire blue line up and down by applying a relative low voltage DC. It should act just like the static magnet rotation. If no movement, bad coil. I checked the CTC5 schematic and it shows independent horz and vert coils on a common form. My CTC2B is the same way, but the CTC4 has only a single coil fed with a complex H/V waveform. Too bad, I still have my CTC4 convergence assembly I'd send but it wouldn't work for you.
The Bing Crosby Christmas picture has great color, reds are sensational! That 21FB or 21FJ really pumps color, are you sure you still want to run a 21AX if you ever get a good one, and always wonder if and when it goes to air? I'd stay with what you've got.........Tom
|
You understand the coil situation perfectly. I can try the DC current and see what happens - I'm betting the blue H coil is dead. As you may know, the static convergence in this chassis is done via a DC current in the vertical dynamic coils, supplied by means of those unique tapped 100 ohm pots.
Regarding the 21FJ, yeah, the reds are OK, but the greens and cyans will never be the same as the 21AX. Besides, the R-Y gain really should be boosted for the 21FJ, which will make the reds even brighter, but most important, increase the hue variation in the red-yellow-green area. (The sulfide green is yellowish, therefore it's the same as mixing some red with the green, and therefore you want to increase the R-Y gain so red gets turned off more on greenish hues.)