Recently Acquired 1969 Motorola Color Tube Tv

[zeno]

If you are chasing a specific problem you can tack in a cap
of the same value & voltage as a test.
If not leave it be for now.
If you are recapping the set just do a few at a time & recheck as
you go. Its always best to get the PS running first the Hoz/HV
then vert. In other words one stage at a time. Mass recapping
very often leads to a broken set thats MUCH harder to fix.

73 Zeno
LFOD !

[Lain94]

Originally Posted by zeno

If you are chasing a specific problem you can tack in a cap
of the same value & voltage as a test.
If not leave it be for now.
If you are recapping the set just do a few at a time & recheck as
you go. Its always best to get the PS running first the Hoz/HV
then vert. In other words one stage at a time. Mass recapping
very often leads to a broken set thats MUCH harder to fix.

73 Zeno
LFOD !

I 100% agree with this. I will only start with the known bad caps first and go from there if necessary just so things will not get too mixed up. On a side note. What are your thoughts on "picture tube brighteners". I have one that was given to me and it is for 90 degree angle rectangular color picture tubes. It basically uses a small transformer to step up the voltage and increase the brightness on a dim/dark weak crt. Is there any drawback to this? I may use that as a temporary remedy for the CRT until I find a suitable replacement for the high hour crt in the set.

[Notimetolooz]

If you are sure that the problem is the CRT and you think you can find a replacement tube, I suppose as a last resort they are OK.
There have been cases where a previous person put a brightner on because they didn't correct the real problem with the set.
Brightners age the gun cathodes faster than normal so whatever life is left in the CRT is used up fast.
The proper use for them was so that a TV owner could have a brighter image while the repair shop was waiting for a replacement CRT to arrive.
Today replacement CRTs are much harder to find.
Typically on a color tube one gun wears out first making the color balance impossible to achieve. If you say all the drive controls are set near one end it suggests there is another problem that is common to all colors.

[Lain94]

Ok, I am now replacing just the problem capacitors for now, but the wire fuse in the power supply circuit blew so it looks like I will need a "#31 copper wire fuse" Not sure how many amps that was or what voltage rating I need though, the schematics say nothing about that. Assuming #31 means SWG than I believe that would be 8 amps. But I still need to know how many volts minimum I need for the fuse to be safe to use as a replacement.