I have an important question

[jeyurkon]

If your BK 465 is showing the cutoff as being good, then the base connection must be o.k.

John

Originally Posted by Bill Cahill

Thank you both very much. Your ideas and, from my friend Mr. Detrola at ARF
coincide, and, give me an excellent starting point on what to do.
As soon as possible, I ntend to impliment those ideas.
I'll let you know the results.
INterestingly, the agc switch is also having no affect, so, that shows that for some reason, the signal just plain isn't getting to the picture tube.

I have a further question...
I checked the tube on my BK 465 tester, and, it says tube is wonderful!
Would it still check good if that grid wasn't making connection?
Not sure where the tester gets its' data. Cathode, grid, or, what?
Bill Cahill

[DaveWM]

did you try puting the DVD composite signal at test point E (think that it, the testpoint after the dual diode tube). that would isolate the problem to before or after the IF section.

[Bill Cahill]

No, but, I tightenned pins on pix tube socket. I then checked grid voltage at pix tube. It should have approx. +8 volts, but, only had 1.255-1.575 volt.

I got to thinking it might be a video I F problem, but, I checked some resistors with no luck.

I then found one of my brand new 2W metal Oxide resistors has gone bad. I thought that was it, but, I think it's feeding horiz. osc., so, probably not.
I don't have any more of that value, so, I'll have to order them.
I think I'll connect the test tube, and, start checking voltages.
Bill Cahill

[cwmoser]

Hey that sounds "poetic".
It shows the fustration you are having in a poetic way.
Reminds me of the Book of Job where nothing could go right with that feller Job.
Just messing with you Bill -- hope you get it all sorted out.

Something to make you feel better -- I had a long saga with my Zenith Porthole and now its working. But, I miss working on it. Enjoy it now, you might miss working on that TV :-)

Carl

Originally Posted by Bill Cahill

As some of you from ARF may remember, this has been a very long, drawn out project. My world's worst nightmare.
I bought this set on ebay a little over 3-4 years ago. She actually shilled me for sixty bucks, and, I was the only bidder. She was using a friend in NY who collected purses, lady friend, that is.
I paid sixty bucks for this gem.
Cabinet: O.K. Dirty, missing some finnish.
Set looked good, but, dirty, smokey.Not cigarettes, as it turned out. It was from all the disastors with this set.

This set was a real factory lemon. It has had everything wrong with it.
Let me go over a list of parts I've replaced, so far, not in order.....
Electrolytics
Capacitors
Micas
Resistors
Pix tube
All other tubes
Tuner
Speaker
Flyback
Yoke
Vert. osc. transformer
Cabinet power on light The wires cracked, and, were brittle. Socket was rusty
Removed incorrect 10A hv fuse, and, installed correct .25A fuse.
Hv cage. Old one had some rust.
A number of screws.
Tube shields.
Volume, and, tone controls
Vertical hold, and, horizontal hold controls. Dammaged by UPS
Height control dammaged by a short while I was working on it.
Vert. lin. control. Open.
Width control. Changed value.
Many resistors
Picture tube socket. Wires were brittle, and, breaking.
What a mess!
Oh, yeh. Power cord
Back cover as original had chemical stains, and, labels ripped off.
I have correct model cover on it.
I am deeply into nostalgia.I am crazy. I got in too deep, and, can't quit now.
But, I wish I had two years ago.
Be it as it may, how much more can go wrong?
Did I mention horiz. osc. coil?
That wasn't working at all right.
Now, I have no video.
What more can go wrong?
True, it no longer blows up, pops, smokes, or, catches on fire.
Speaker, by the way, voice coil fell apart.
This set has been my worst nightmare! :dam mit:
Please help me finnish this set, guys. I can't quit now..
Oh, I forgot. 2 video if transformers, one dammaged by me when set fell off bench. Other by UPS. One aud. det. trans. also dammaged by UPS.
I'm going crazy!
I want to finnish this set. I can't quit now!
Besides, I have friends supporting me, and, enemies harrassing me....
I must finnish this set!
Vertical problem is fixed!
For a brief while, looked like it was going to have a decent picture.
Last year, though not correctly, I actually had it playing for two weeks.
HELP!!!!!!!
Bill Cahill Thank You......

[Bill Cahill]

Forgive me, guys, while I rant..
BOY< AM I A DUMB POLLOCK!
Yes, I'm half Polish.

I found my problem..
IT'S ALL MY FAULT!!

There is a 6800 ohm resistor coming off the 370 volt line feeding a 10K resistor, and, choke in parallel, feeding voltage to 2nd half of video amp, and, feeding some voltage to agc circuit.
Well, I needed to replace that 6.8 k resistor.
I did.
WITH A 68k RESISTOR!
Dumkoof, you fool!
I read the resistor wrong!

Now, you ask, why was he temporarilly getting video?
Easy.
The connedtion is right next to a B+ connection feeding horizontal oscilator.
My second mistake is I also had my new resistor dressed wrong, so, it was temporarilly making connection, so, I was getting video, but, horiz. oscilator was severely messed up!

Now, the bad news. The clolsest I have is 2 15k resistors. I tried putting them in parallel, but, I'm getting over 7500 ohms.
I may try it anyway.....
Bill Cahill

[Eric H]

I think 7500 ohms would be close enough, it's very close to 10% tolerance.

[Bill Cahill]

Originally Posted by cwmoser

Hey that sounds "poetic".
It shows the fustration you are having in a poetic way.
Reminds me of the Book of Job where nothing could go right with that feller Job.
Just messing with you Bill -- hope you get it all sorted out.

Something to make you feel better -- I had a long saga with my Zenith Porthole and now its working. But, I miss working on it. Enjoy it now, you might miss working on that TV :-)

Carl

Don't bet on it. I have two of the cheaper chassis to work on, and, a possible 3rd tv coming. Believe me, I WON'T miss it!
Bill Cahill

[Bill Cahill]

Well, replacement resistors hadn't arrived yet, today, so, I jury rigged 2 15K resistors in parallel.
Close second.
While checking out final wiring, I found that the shield under the 4th video I F had broken loose from center pin on tube socket, so, I soldered it back on.
Anybody know what that might have caused?
I'll be trying set maybe as early as tonight.
Bill Cahill

[Bill Cahill]

Tried set today. Had my video back. However, bringing variac up, an old hv problem happenned again. Raster kept flashing on, and, off, and, I was getting alot of static noise in speaker. I heard sizzling in chassis.
I shut it down. Smelled like something burning.
This happenned twice befor with shorts on horiz. out. socket.
Tonight, reluctantly, I took set back apart, and, put a very strong light on output socket.
I found something!
Factory problem Number 586.
On pin 5, a resistor, there is a tiny piece of the resistor wire sticking sidewayl
Wait a min.!
That's pin 4 and, 3. Pin 4 is a tie point.
Well, that short little piece of lead had a tendency to intermittently short to pin 3.
I moved the two pins away from each-other.
Then, a 47 ohm resistor going to adjustable cap off p5 broke loose from cap due to poor solder connection.
So, tommorrow, I have to fix that.
Then, I'm going to give that circuit one real good going over again. If I see no more problems, I'll put it aback together, and, try it again.
This set has truly been this technician's nighmare!
If I never run into another problem set like this again it will be too soon!
How many times, I wonder, did this set keep breaking down?
It must have been a constant problem to keep it running.
This set should have been torn down at the factory, and, re built.
It was a major lemon!!
Now, this may have actually been the cause for it blowing high voltage fuses for original owner in 70's.
This set had a 10A fuse in it. Flyback was cooked.
For a year I kept getting intermittent shorts on horiz. out. socket, but, every time I tried to find the problem, it went mysteriously away.
Today, it had returned..
This set is very frustrating.
I hope that outside of final adjustments, this will finally finnish this saga once, and, for all....
Bill Cahill

[Bill Cahill]

I will be trying set soon. I recieved help on horizontal output socket. It was a problem before, and, I couldn't find the short. Now, someone with better eyes found the intermittent shorts, and, I believt that problem is fixed once, and, for all.
I have given up posting at ARF, and, will post there on this set no more.
I will finnish posting on this set here, and, at my own forums.
I'm tired of the sniping.
If some people don't like the posting, just don't read iot!
I did it as a service to others. It sure hasn't done me any good.
I wanted to help others in servicing these sets.
Bill Cahill
I just am fed up with the sniping, and, flame baiting there. PERIOD!

[miniman82]

Originally Posted by Bill Cahill

I will finnish posting on this set here, and, at my own forums. I'm tired of the sniping. If some people don't like the posting, just don't read it! I did it as a service to others. It sure hasn't done me any good. I wanted to help others in servicing these sets. I just am fed up with the sniping, and, flame baiting there. PERIOD!

Hate to be the one to point out the obvious, but most of the people there are also on here.

Also, when threads are 60+ pages long they become valuable to no one, and annoying to everyone. You said you did it to help others- who's gonna search through a 60 page thread? I'd be very surprised if this thread here is allowed to get much farther than 10 pages, or the same thing would likely happen.

If you want my honest opinion, your thread over there reads more like a blog than an informative fact-based electronics restoration. I mean, just look at this post from the other day:

"We also went out to lunch for some of the best chicken around anymore. he agreed. His comment to them was, "This is the second best tasting chicken I've ever had, and, I haven't found the best yet." It is just great chicken!
He was only going to eat one piece, and, ate most of it...Yum!!!!"

WTF does that have to do with a TV?!? That stuff belongs in a general forum, not a tech forum. My advice is do not post in this thread unless there's actual SUBSTANCE, for example: you fixing your TV.

[Bill Cahill]

Hate to tell you this, but, I'm aware many people here are also there.
If you read those 60 plus pages, you'd find alot of valuable information.
Evidently,, you've missed alot.
As for anything else, it's a moot point.
My answer is set is playing.
I still have some picture issues, but, I have a picture, and, sound.
Now, is there anything else you want to know that will help?

[Bill Cahill]

Just a fast note of information.
I adjusted the set most of the night.
At this stage, I have a picture, sound, vertical is full, but, both sides of horizontal are short.
I also have a very slight picture pull at the right outer edge.
It's either got to be tubes, or, maybe electrolytic problems.
I'll try the tubes first.
Other than that, set was on for over 4 hours, and, is stable.
Bill Cahill