1968 Motorola works in a drawer

[TUD1]

I find it interesting that these have to separate controls for tint. They have one wheel for tint, and a slider for hue.

[zeno]

Originally Posted by TUD1

I find it interesting that these have to separate controls for tint. They have one wheel for tint, and a slider for hue.

Dont remember on Motos but Admirals had a control that changed
the grey scale for a "warm" or "cool" picture. Always center it
before grey scaling.
73 Zeno

[zeno]

Your father sure has a touch with wood. Wish I did !!
This will be a show piece when done.

73 Zeno

[old_tv_nut]

Originally Posted by TUD1

I find it interesting that these have to separate controls for tint. They have one wheel for tint, and a slider for hue.

I know that Moto tube sets had the separate tint control because of the super-simplified DC-coupled single tube chroma section, but I didn't remember one on the solid state sets.

http://www.videokarma.org/showthread.php?t=93056

[zeno]

Smearing is almost always CRT. If it only the red & only
with the color turned up even more so BUT it should
also smear some on a hard driven B&W pix.
Only other thing is the 200V that feeds the 3 color output
transistors. If the 200V isnt clean you can get smearing
& a lot of other symptoms, often subtle. Check
any 'lytics on it.
For blue pot you can add a 2W resistor in series with it.
About half the value of the pot. This will move the setting
away from the bad spot. Then you can scare up a replacement.

73 Zeno
LFOD

[maxhifi]

Originally Posted by zeno

Smearing is almost always CRT. If it only the red & only
with the color turned up even more so BUT it should
also smear some on a hard driven B&W pix.
Only other thing is the 200V that feeds the 3 color output
transistors. If the 200V isnt clean you can get smearing
& a lot of other symptoms, often subtle. Check
any 'lytics on it.
For blue pot you can add a 2W resistor in series with it.
About half the value of the pot. This will move the setting
away from the bad spot. Then you can scare up a replacement.

73 Zeno
LFOD

It also does it on blue. The effect is stronger on blue than red, and it only smears to the right, the left edge is sharp. Actually it's interesting you mention the three video output transistors, their load resistors look a bit heat stressed, and this PCB has clearly seen some repairs in the past. I did a bunch of re-soldering and repaired a trace on it but changed no parts during the recap. I will check the supply voltage and all the voltages on those transistors, if one was saturating would it have a smearing effect?

Thanks for the advice regarding the blue pot, that should be enough to get me going!