My 630

[Geist]

Hi All;
OLD COOT, So am I !!!!
I hopefully got some .047 caps coming and so I can put the ones affecting that section in and see if it helps..
My roomate doesn't care for a Trailer full of smoke.. And neither do I..
THANK YOU Marty

[Dangler]

Originally Posted by Geist

Hi All;
OLD COOT, So am I !!!!
I hopefully got some .047 caps coming and so I can put the ones affecting that section in and see if it helps..
My roomate doesn't care for a Trailer full of smoke.. And neither do I..
THANK YOU Marty

Back in the 70's, my trailer was always full of smoke!

[Geist]

Hi All;
Dangler, How did you get the air cleared and the smell gone ?? It took about 2 or 3 days to get things back to normal.. Of course we have had a few days of cold winter weather.. And couldn't leave the front door open for very long..
THANK YOU Marty

[bandersen]

Originally Posted by Geist

Hi All;
Bob, I'm a little confused then.. What and where did you get the caps needed for the 630 ?? Most of the caps I ordered from Mouser were only the more popular variants.. How and who do I get what is really called for in the 630 ??
From what I see, I need .1, .01, .015, .025, .035, .05, .002, .0025 .004, .005, and 6500, 1500, 1200, 1000, 680, 470, 390, 270, 82, 75, 56, 51, 47, 43, 33, 10..
I got .047, .01, .024, .02, .0039, 1500pf, 1200pf, 1000pf and I am not even sure they were the correct ones..
THANK YOU Marty

Oh, you just round to the nearest modern value. e.g .022, .033, .047, .022, .0022, .0047 etc. Those old caps had a wide tolerance and these modern values are plenty close enough.

Also, all these are ceramic or mica and probably don't need replacing. 6500, 1500, 1200, 1000, 680, 470, 390, 270, 82, 75, 56, 51, 47, 43, 33, 10..

[Dangler]

Originally Posted by Geist

Hi All;
Dangler, How did you get the air cleared and the smell gone ?? It took about 2 or 3 days to get things back to normal.. Of course we have had a few days of cold winter weather.. And couldn't leave the front door open for very long..
THANK YOU Marty

Didn't really want to....unless the cops showed up!

[Geist]

Hi All;
I used the Variac and took it up to 140 Volts and used the 300 Volt tie point right before the choke and used that connection to temporarily shorted pins 1 and 5 and 6 of the Socket for the 1st Video Tube a 6AU6, with everything disconnected from those pins except for the socket.. It seemed fine, no sparks, nor anything, so I think there are no shorts to those pins, especially to ground.. Now to put it all back together..
THANK YOU Marty

[old_coot88]

Originally Posted by Geist

Hi All;
I used the Variac and took it up to 140 Volts and used the 300 Volt tie point right before the choke and used that connection to temporarily shorted pins 1 and 5 and 6 of the Socket for the 1st Video Tube a 6AU6, with everything disconnected from those pins except for the socket.. It seemed fine, no sparks, nor anything, so I think there are no shorts to those pins, especially to ground.. Now to put it all back together..
THANK YOU Marty

Hah. By that account the socket is OK. The only thing left is the tube itself. I take it you don't have a tube tester? If not, try this..
Connect everything back to the socket except pin 5. Put the tube in the socket. Take a 10K resistor (or some value in that ballpark) and clip one end to pin 5 and the other end to the 275V source.
Consider that resistor sacrificial, because if the tube shorts, it will quickly fry the resistor in lieu of frying the resistors R140 and R141 which got smoked originally.

[Geist]

Hi All;
I have it all back together, I didn't see Your posting (Old Coot) in time, I first took it up to 110 without the tube in it.. I have put the tube back in and have it up to 110 volts, checking the temperature of the two resistors, at each intervil.. Both resistors are (for now) nice and cool..
I do have a tube tester, But, I am suspisious of it at present..
I can tomorrow, put the other resistor in and leave it that way for awhile, as a way to check it out for a longer period of time..
I have the chassis upside down for now and no picture tube nor high voltage, I pulled the 6BG6, for now..
THANK YOU Marty

[old_coot88]

Dang mystery short. Wunner if it coulda been a tin whisker that was cleared by all the futzing with the socket. Back in the day, tin whisker problems were unheard of. Stuff wasn't old enuff to grow whiskers.

[Geist]

Hi All;
Old Coot, It could have also been wire wisker, as all of the wires on all of the caps had been taken off and put back in, or even a stray piece of loose solder.. I still plan for a awhile do as you suggested and put in the 10K resistor.. Just in case and also to see if anything shows up..
THANK YOU Marty

[Geist]

Hi All;
I have put in the 10K resistor, as per Old Coot's suggestion.. I have powered the set up, with the Picture Tube in.. I get something, and I can make the Vertical lock in, with adjusting of the Vertical Hold Control.. The Horizontal, will maybe not lock in, with adjusting the Horizontal Hold Control, but the Picture is Smeared.. So, I think it might be close.. I will need to look up in my books on smearing pictures.. If my books suggest that it is a Cap issue, then I know I will need to wait till, I get them all replaced.. And then figure out IF it might be another control, that needs to be tweeked..
I KNOW that I am still waiting for the Caps to come and , also order the rest of what I don't have.. So, I can replace the necessary paper caps.. But, it seems to be working better than before.. Had work today and tomorrow, so next week on ordering the rest of the Cap parts..
THANK YOU Marty

[old_coot88]

By now it's probably safe to assume the short whatever it was, is gone. I would go ahead and hook pin 5 back up as original. With the temporary 10K in there, a couple of peaking coils and electrolytic C223B are out of circuit. This could be making the video a bit wonky.

[Geist]

Hi All;
Right now, what I have is the 10K, by-passing R140 and C223B and R141.. The Peaking coils are in there as well as C140.. I did it this way since it seemed to work, before I read your earlier posting.. I thought that, as you had said replacing one resistor instead of two resistors would be easier and simplifier.. I figure that leaving it this way for awhile, just to make sure would be ok, as I have not run it for a real long time as of yet.. The last time , when it burned up, it had been on for awhile, and I have as of yet to work up to that kind of time, being on.. And YES, I do bring it up using the Variac.. And Thank You (Old Coot) for sharing with us who don't know your experience in TV Repair, from your other posting..
THANK YOU Marty

[Geist]

Hi All;
I have looked up my Smearing problem in my Book.. And from the Tuner up to the Sync it is mostly Tuning and or adjusting.. It seems that the Video section is the most likely suspect and then the Sync section.. In Both sections it suggest checking Caps for Leakage, over or under value, Load Resistors changing value, and Peaking coils changed to larger or smaller or open.. So, I need to wait for the Caps to come in as this is the most likely cause..
THANK YOU Marty

[old_coot88]

Originally Posted by Geist

Hi All;
Right now, what I have is the 10K, by-passing R140 and C223B and R141.. The Peaking coils are in there as well as C140.. I did it this way since it seemed to work.... I thought that, as you had said replacing one resistor instead of two resistors would be easier and simplifier.. I figure that leaving it this way for awhile, just to make sure would be ok....

At this point, you'd be better off to restore the circuit as original, since the designers did it that way for a reason.
Our one-resistor shortcut was only to simplify hunting the "mystery short" in the tube socket. But now you want the circuit to behave as designed, ie., with C223B "clamping" the junction of R140/R141.