ctc12 clone beam current

[Username1]

The current seems high as miniman explained. And since the reg is working off b+boost
we will have to figure it out... We're trying with the clues we have.... I got one
of the rca schematics off the internet, it says 390v and 376v to grid of 6bk4, you
have 402, and 390V grid I believe.... So lets look at your B+ voltages.....
Check them right off the caps in the PS.... 405V-c125 160mfd.,
386V - c120A 80mfd, and I think the last was 276V c-120b 50mfd.

Does your schematic have a total current for the HV output...?
as in picture tube plus HV reg....? and an acceptable way to
determine total....? As per sams.... to be accurate...



.

[miniman82]

Sure would be easier to follow this thread if there were some daggone punctuation...


From what I gather, the regulator seems to be working as it should. You said you put a new fly in it? You probably wired it wrong, there's no reason for HV to be drooping like this.

[timmy]

Originally Posted by miniman82

Sure would be easier to follow this thread if there were some daggone punctuation...


From what I gather, the regulator seems to be working as it should. You said you put a new fly in it? You probably wired it wrong, there's no reason for HV to be drooping like this.

yes it is a new flyback and this set always had a hv issue but i thought i had found the problem when i changed the fly i discovered the 1v2 was wired wrong and since correcting that the focus voltage and the overall focus had much improved. i found the mistake and corrected it and checked other areas for other mistakes and having the sams i was able to check areas and fix the wiring mistake. i also double checked all the work i had done by the sams and found none.

[miniman82]

Originally Posted by timmy

I also double checked all the work i had done by the sams and found none.

Sams can have mistakes, bounce the schematic against an RCA one?

[Username1]

Originally Posted by miniman82

Sure would be easier to follow this thread if there were some daggone punctuation...


From what I gather, the regulator seems to be working as it should. You said you put a new fly in it? You probably wired it wrong, there's no reason for HV to be drooping like this.

Yes, he said new fly, and he rewired the focus circuit because something was wrong...
I thought something may be wired wrong too, that is why I asked the questions
about Horiz. Centering, and focus the other day... I figure if they work, and have
some reasonable range, then maybe there is no mistake...... In one of the
earlier threads I also asked about the new fly, and if all the contact points
were correct, or if there were mods on any install note sheet....

It would be cool if someone with recent experience on this chassis takes the point....

That reg. circuit is too simple to be causing all this trouble....

.

[timmy]

Originally Posted by Username1

Yes, he said new fly, and he rewired the focus circuit because something was wrong...
I thought something may be wired wrong too, that is why I asked the questions
about Horiz. Centering, and focus the other day... I figure if they work, and have
some reasonable range, then maybe there is no mistake...... In one of the
earlier threads I also asked about the new fly, and if all the contact points
were correct, or if there were mods on any install note sheet....

It would be cool if someone with recent experience on this chassis takes the point....

That reg. circuit is too simple to be causing all this trouble....

.

well there were no mods or special notes in this set. the hv reg does look simple but i have this set for 2 years plus and was never able to find whats going on with it . so i might just as well try the crt from my other set because of the mark on the inside of the glass on the crt thats in the set now was not there when i first got it but over a small amount of time this set has on it since i have the mark appeared so maybe the interior dag somehow is damaged and causing all of this i dont know but ill have to rule it out once and for all.

[timmy]

Originally Posted by Username1

The current seems high as miniman explained. And since the reg is working off b+boost
we will have to figure it out... We're trying with the clues we have.... I got one
of the rca schematics off the internet, it says 390v and 376v to grid of 6bk4, you
have 402, and 390V grid I believe.... So lets look at your B+ voltages.....
Check them right off the caps in the PS.... 405V-c125 160mfd.,
386V - c120A 80mfd, and I think the last was 276V c-120b 50mfd.

Does your schematic have a total current for the HV output...?
as in picture tube plus HV reg....? and an acceptable way to
determine total....? As per sams.... to be accurate...


ok this chassis is a clone and i have the sams for it and i show 370 and 385 and yes the voltages i posted have not changed and they are kind off high, i think around 15 volts. and the highest on the b+ is 400 volts and 390 volts and i knmow it was right but i will check it again to be certain this time and i will write everything down. the sams shows that the hv regulator current should not be less then 850 microamperes . it says to adjust to 23kv but i cannot get it there. he suggested in the first paragraph that the hv pot was maxed but it was not it was counter clock so thats why i put the specs up again. other then the voltages the other is ma.
.

omg this set