Well, after many months of hard work, several mis fires, a few shorts, etc..., here is the latest on it.
Tosay,, connected my test picture tube, speaker, etc., sired her up, and plugged into variac.
The good news is I got good sound reception on channel 3 with a 3' lenghth of wire.
The bad news is No hv, no vert. Sweep,
And, maybe, no boost.
I think this has something to do with when someone kept popping fuses, and put a 10 A fuse in it. Me thinks something significan't has been dammaged.
That's all I know on it now.
Bill Cahill:tears:

That don't sound to good , Is that the set that was made in 1950 thay you were working on ?
How many secondary outputs on the power transformer ?
Is it just a 6.3 filiment voltage and a B+ ? or are there other outputs ?
What Im wondering if it could be possible that there is a power resistor that has died , or the ohms reading is to high ?
Sounds like the B+ is OK for the RF IF and sound circuits , but not there for the oscillators or the deflection .
I hope you get it sraightened out :thmbsp:

I would check for B+ voltage through the damper tube and flyback...remove the top cap from horiz output tube and carefully connect the voltmeter to the disconnected cap lead. If the flyback/damper are passing voltage there should be the B+ voltage present there and this means these components are likely OK.
If this checks out then check for a signal from the horizontal oscillator, check negative grid voltage at the HO tube and plate voltage at the oscillator tube etc. Also there is usually a damper fuse in this age of set so make sure that is OK too.
The horizontal output stage/flyback need to be working to develop the boost voltage.

Been there, done that. Flyback checked shorted on flyback checker. I found one that barely checks in the green. I need a new flyback. Anyone got a new Fly 45 they can spare???
I simply replaced bad dampter winding with a new hv insulation 6.3 volt, 1.2 A transformer someone kindly gave me.
All B+ resistors check good. I may also need a new yoike for this set.
They used this set to death. Right into the ground.
Out of 21 tubes, I also had to replace 10 tubes, and picture tube...
I did get audio reception this week on 3' of wire. Channels 3,and,something on 12 came in.
Bill Cahill

I think this has something to do with when someone kept popping fuses, and put a 10 A fuse in it.

What?!

One does not solve the problem of blowing fuses by putting in a higher rated fuse. :nono:

Hi Bill
Moyer has a FLY-45. I've taken alittle break from my KCS-47A It's running with a few problems. Even though It's very watchable with a good picture. But will get back to it after the new year. Btw did you get that volume/tone control out for me?
Terry

I have to check. I just found out they burned the tone control in mine. I'm beginning to think this set wasn't worth fixing. I'm not quiting after all I've done, but, if the truth be known, I'd say this one was totallly junk. I think 60.00 price was 55.00 too much..
Anyone have opiniions?
Bill Cahill

It's got desent cabinet mine don't
Terry

Well, that's the one saving grace. But, that isn't mint, either. It had alot of finnish flaking, and, I had to do some touch ups.....
It's not mint...
Well, anyway, I have it semi playing, and, the chassis looks nearly like new, now. Hopefully, I'm getting closer now........
Thanks for the encouragement.
Bill Cahill :yes:

:yes: Since I found my small supply of 1,000 volt silver mica caps, I am going to play it safe, and, also replace micas in horiz. osc., and, on sync amplifier. It don't hurt. I'm finding more, and more micas failing in this old stuff....
I'll begin this project tommorrow.

Moyer charged me 45.00 for that flyback. What am I? Crazy????
Yes!:yes:
I found one that checks barely in the green, and, I'm trying it first. But, I'm replacing the mica caps, first....
Wish me luck.

Polaraman, I'm not giving up. This set will play if it kills me, and, it might......:tears:
Bill Cahill

Bill,

I have that exact same set that I picked up in the summer. The cabinet is a little different on the doors but otherwise, the same model.

If nothing else, your adventure with yours will serve as an invaluable educational tool to those like myself who have yet to dig into their version of this set.:yes:

Keep plugging away, I know you will get it working!:thmbsp:

Roy

It's got desent cabinet mine don't
Terry

May I see yours? I'd like to see the style, and, condition.. Got any pictures of re building so I may compare notes? I've been keeping a detailed summary in ARF of what I have been encountering with mine, including pictures...
Thanks. Bill Cahill

Bill,

I have that exact same set that I picked up in the summer. The cabinet is a little different on the doors but otherwise, the same model.

If nothing else, your adventure with yours will serve as an invaluable educational tool to those like myself who have yet to dig into their version of this set.:yes:

Keep plugging away, I know you will get it working!:thmbsp:

Roy

Thanks, Roy.May I see yours? If you guys want to see a detailed report on what I've been doing with mine, I've been keeping a very detailed one including pictures at ARF in the television section under Restoration continues on my RCA Victor television. It's about 7 pages long including the replies I've been getting. If it will do you guys any good you can copy each page to keep your notes on my progress.....

Today, I'm replacing mica caps.....
Thanks again.
Bill Cahill :thmbsp:

Here's the latest on it...
Well, after replacing the 1B3 yesterday, which checked good, I got full hv.
I now have a bright horiz. white line accross the screen.
No vertical sweep, however....
Sound died again.
I am getting two channels for sure, as I can see movement in the line. People movement, that is.
Horiz. osc. is still un stable, but, I want my vert. back first....
May just be adjustment problems on horiz. osc....
I'm going to work oon vertical problem today....
I have a new yoke in it....
I'll post pictures when I get something more interesting than just a white line.
Bill Cahill :banana:

O.K.
Don't know how to install the picture here, but, If anybody wants to see pictures of my latest point on the tv, please follow this link, and, scroll down to my latest pictures of tv playing.
http://antiqueradios.com/forums/viewtopic.php?t=73266&start=240

I'm having some serious vertical issues, but, I have hv, and, a picture... Please take a look, and, help me if you can. Thanks.
Bill Cahill :banana:

Dosent look like you have much verticle amplitude. Have you unhooked one lead of the primary and one lead of the secondary, on the verticle oscilator blocking transformer and measured the DC ohms resistance. If either the primary or secondary on the verticle oscilator blocking trans is open, you will not get the correct signal to drive the vertical output tube which in turn drives the vertical output trans.

What do the waveforms look like going into the grid of the vertical output tube? are they the correct shape and amplitude?

Remember your scope knows all and tells all!

I now have a bright horiz. white line accross the screen.
No vertical sweep, however....

I'm going to work oon vertical problem today....
I have a new yoke in it....


It could just be a bad or incorrect connection of the new yoke's vertical coils to the vertical circuits.

Be sure you don't run the set with much brightness without any vertical. Else you could burn a line in the phosper of the CRT.

Here's the only way I could get a picture in. Here is a picture from my photobucket album.
http://i18.photobucket.com/albums/b122/55Bill51/RCATVcomestolife001.jpg

Bill Cahill :banana:

Can anybody help me here?
Polaraman, I'm making headway.

My 721ts has this sort of problem with the vertical. Neither of the vert transformers test bad with the ohmeter. I've been through that circuit up one side and down the other 20 times and I still can't manage to trace it down. I can get sweep with an external source or by jumping a cap from filament to grid. I'm thinking of getting a new osc transformer just to eliminate it.

The primary resistance on the blocking transformer should be about 135 ohms, and, secondary, about 1 K ohms.

Check your vertical centering control. If that goes bad, you could also lose your vertical, and, that's a special 4 watt tapped pot.
Bill Cahill

It seems like that pot had burnt out (too much current going somewhere) and I subbed in some wirewound resistors. Lots of screwy stuff going on in that set. I'm in no hurry to dig back into it!

Man , this reminds me of the fun I was last having with a 1955 General Electric utravision , which I still have to finish :tears:. It seems like when there was a change in the horizional frequency , it was also causing the vertical line to change . Is your RCA doing this ?
Bill , how is your horiziontal ? does it drop off to a lower frequency ?
Mine was constantly fluxuating from almost the correct freq to was below .
It was very intermittend , almost like a loose connection , or dirty tube socket ect. ect..
I have been over this set and still it causes me the same problems , except with slightly better vertical than you have right now .
Have you checked the resistors in the vertical oscillator ?
Also being that it effects both horizontal and vertical , Could it be in the sync circuit , and the vertical and horizontal oscillator circuits are being effected by a problem in there ? :scratch2:

Interesting , Hang in there Bill , one of these day your going to get it . :thmbsp:

Vertical problem was caused by an open vertical oscilator transformer.
Unfortunately, following the same color codes for putting in new one proved a bad idea.
New one is normal. Red-Blue. Primary.
Green -Yellow, Secondary.

Then I found out from schematic RCA was goofy.
Green-Yellow, Primary
Red-Blue, secondary.

Had to have chassis at odd angle to replace trasformer. It slipped, and nearly fell on floor.
I grabbed it with both hands, and, saved it.
However, two tubes got knocked out with severely bent pins, fixed that, and, it broke the adjustment core in last video I F transformer.I now have to replace that!:tears::sigh::no::nono::thumbsdn:

I think this set doesn't like me.....:tears:
Bill Cahill

Let's see....
What have I got in this little gem now???
Chassis:
Electrolytics
Capacitors
Resistros
13 tubes out of 21
flyback
yoke
vert. osc. transformer
mica caps
some wiring
Some terminal strips for new filters
A few missing screws replaced
Power cord
Yoke.

Cabinet::
Picture tube
Sime missing screws
Alot of touch up time on finnish dammage
Re gilding plastic emblem on front
Two missing pieces of door hardware from a junker of same model
Cleaning, and, re lacquering door pulls.
Yikes!!!!!!!!!
I've got blood in this gem!!!!!!
:no::sigh::scratch2::D:no::yes::tears::thumbsdn::t ears::naughty::yikes::yikes::yikes:

Wow , more or less a new set :yes:

Hi, guys. Here's the latest on the tv, if interested......


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Restoration continues on RCA Victor tv. See pictures........ Goto page Previous 1, 2, 3 ... 13, 14, 15

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HuggyBear
Senior Member


Joined: 31 Dec 1969
Posts: 4303
Location: Warren, MI, USA 48093-6744
Posted: Feb Tue 05, 2008 5:12 am

--------------------------------------------------------------------------------

Reminds me of that one Bugs Bunny / Yosimite Sam episode:

"I wonder if he's stubborn enough to open all those doors?"

BOOM!!

"Yep, he's stubborn enough!"

I don't think too many people would have been stubborn enough to finish that TV. you went past my stubbornness level months ago. I admire your tenacity and there's a lesson here for the world. I suspect success is closer than you think.

But - Not giving up is not the same as working way past when you should call it a day. Then you do things like miswire things, drop chassis, etc. Know when to say when, it will still be there tomorrow, nobody is going to take it away. Mike will make sure of that.
_________________
"I'd sooner tell Peter on the Last Day about the laffs I had given folks on Earth than try to explain to him about givin' them heart akes."
Cal Stewart, 9/22/1919 (b.1856-d.1919)




M3-SRT8
Senior Member


Joined: 07 Nov 2007
Posts: 66

Posted: Feb Tue 05, 2008 9:19 am

--------------------------------------------------------------------------------

Bill Cahill wrote:
In defiant response to a post in another post meant only for my own good, not as harrassment, here is my reply....
I will take??? off, and, I will be back on it. I'll finnish it if it kills me!!!!
While I admire the work done on the 630 in the other post, and, admire the proffessional work done, I am one stubborn old -6-65-54-=54-=5 of a person, and, I'll fix this thing if it's the last thing I do!!!!!
Thank you.
Bill Cahill


That would be Me.

I just hope it won't be the last thing you do. Everybody here, including Me, knows how good You are, Bill. I've received many good tips from You, and others on this Forum. Just don't let the damned thing do You in...

LJB




Don Cavey
Senior Member


Joined: 31 Dec 1969
Posts: 3457
Location: Baltimore, MD, USA
Posted: Feb Tue 05, 2008 10:39 am

--------------------------------------------------------------------------------

And, ladies and gentlemen, we are on page 15. Who was saying, "....
_________________
Don




Bill Cahill
Moderator


Joined: 20 Apr 2006
Posts: 2864
Location: St. Petersburg, Fl. US
Posted: Feb Tue 05, 2008 12:00 pm

--------------------------------------------------------------------------------

M3-SRT8 wrote:
Bill Cahill wrote:
In defiant response to a post in another post meant only for my own good, not as harrassment, here is my reply....
I will take??? off, and, I will be back on it. I'll finnish it if it kills me!!!!
While I admire the work done on the 630 in the other post, and, admire the proffessional work done, I am one stubborn old -6-65-54-=54-=5 of a person, and, I'll fix this thing if it's the last thing I do!!!!!
Thank you.
Bill Cahill


That would be Me.

I just hope it won't be the last thing you do. Everybody here, including Me, knows how good You are, Bill. I've received many good tips from You, and others on this Forum. Just don't let the damned thing do You in...

LJB


I won't. Thank you. Sorry for the rant. Bad day...
Waiting for some .47 mf 630 v caps to come later this week....
Set on hold until they come.......
Bill Cahill

Oh, Don.. Just going on back, and, forth on this thing. It's been a real thorn in my side.
I've come to realize this is now almost a new tv!
Bill
_________________
"Lady, I told ya don't plug it in with frayed wires!"

"What you mean I let the smoke out?"




y2k Bruce
Senior Member


Joined: 22 Nov 2007
Posts: 290
Location: Valrico Florida
Posted: Feb Tue 05, 2008 12:48 pm

--------------------------------------------------------------------------------

This TV of Bill's is well on its way to becoming one of the most famous ones in American history.

I am real tempted to buy this piece of history from Bill when he gets it playing just like a new one. He's just a short drive over the long bridge from me.

Bruce




Robert Howie
Senior Member


Joined: 21 Feb 2007
Posts: 323
Location: b4e3p4, halifax, ns
Posted: Feb Tue 05, 2008 3:55 pm

--------------------------------------------------------------------------------

Bill, you will have earned lots of bragging rights from this one

Me and others look up to you alot. I have learned alot from you and I wish i had 1/9th the encouragement and knowledge as you do, Good luck on the rest of the restoration

Thanks for all the great things you have taught me over the short time I've been a member here,

Can't wait to see a picture of it working, It is no longer a question of if, but a question of when...

All the best,
Robert
_________________
When life gives you lemons, make orange juice and leave everyone else wondering how the hell you did it...




Bill Cahill
Moderator


Joined: 20 Apr 2006
Posts: 2864
Location: St. Petersburg, Fl. US
Posted: Feb Tue 05, 2008 4:50 pm

--------------------------------------------------------------------------------

y2k Bruce wrote:
This TV of Bill's is well on its way to becoming one of the most famous ones in American history.

I am real tempted to buy this piece of history from Bill when he gets it playing just like a new one. He's just a short drive over the long bridge from me.

Bruce


Nope. Niet..
I have no interest in repeating this nightmare!!! Thanks for the compliments, guys. But, I make alot of mistakes, too, as my posts atest to....
Waiting on caps. May not be here until Friday, though...
If I get it playing, I'll not only show it playing on the test tube, I'll also show it playing on its' own tube.....
Assuming,ofcourse, it doesn't blow up.....
Bill Cahill
_________________
"Lady, I told ya don't plug it in with frayed wires!"

"What you mean I let the smoke out?"




antiqueradiobuff
Senior Member


Joined: 31 Dec 1969
Posts: 642
Location: USA
Posted: Feb Tue 05, 2008 5:06 pm

--------------------------------------------------------------------------------

Howdy Bill Miled out 4 .47 @ 630 voltz today should arrive by fri the latest is sat as i was told by the post office
thanks




hoffies2
Senior Member


Joined: 08 Feb 2007
Posts: 1117
Location: USA
Posted: Feb Tue 05, 2008 6:42 pm

--------------------------------------------------------------------------------

DAILY PLANET YEAR- 2028
READ ALL ABOUT IT!!
Local beach resident digs up an unusual item while metal detecting today.
It appears to be an old TV chassis that was buried deeply in the sand for 20 years.
Cause of death hammer blows to the anode, multiple lascerations to internal parts and what appears to be traces of napalm burns on the upper body.
Finder says this is truly the doings of a frustrated person but he will try and restore it to original being..
Reporter,
Jimmy Olsen




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Bill Cahill :yes:

Found at least one reason for popping Two resistors in horiz. output circuit were crossing each other. Looks like it happenned from all the mis handling over it's moving, etc.
Still may not have a good flyback in it. I had also been getting alot of corona, and, hv arcing.It appears the donut is failing. I now have a brand new flyback for it.
I think the reason vert. is still not running is because I have to reverse two wires on winding of vert. oscilator transformer. That should bring vertical back.
I accidentally destroyed the 4th video if transformer when chassis nearly fell on the floor. Replaced that. Set's working again, getting better reception than before.
If I can solve the popping, hv problem, vertical problem, and do re tuning, minor issue, I should have set working like new. Then, I'll be able to put it back together, and finnish final adjustments on its' own tube.
I now have put the original family table lamp on top of the set.
I'll get a picture of that.
Bill Cahill

And, here is my prommissed picture.
http://i18.photobucket.com/albums/b122/55Bill51/MomsLamp.jpg

Bill Cahill

Aw, common! When is it gonna end?????
For just a second, I had a tiny amount of vertical sweep, then, it went back to a straight line.
Now I have found out that my vertical hold control is burned out.......:no:Yes, I've tried cleaning it with control cleaner.
Controls from junker, once cleaned, now check good. Guesss I'm putting those in.........
Bill Cahill

Actually, now open is more like flaky. I'm still going to replace it, but, I think something else is wrong. I suspect maybe vert. out. transformer may be shorted???

On yoke, this is an exact replacement RCA yoke. It plugs in to a socket on the side of hv cage.
I have now had to replace 15 out of 21 tubes....
I replaced bhe IF transformer I accidentally broke when chassis fell. It's fine. It actually plays better.
Bill Cahill

wow... just wow

I'm stupid....
Now that we have established that, I called John Folsome tonight.
Somehow, with all the careful checking I did, I still had the windings reversed on the vert. osc. transformer.
He now has vert. working....
Now, the hv isn't arcing. Two days ago, it was arcing very loudly...
Does this set hate me??
Bill Cahill

Some people have asked, so please see my new Avatar. This, folks, is my latest best friend added to my list of best friends.
This is Mike. He is a Chow mix with some Collie.
He is a very gentle, loving, kind dog, who is also well behaved..
John Folsom met him yesterday, and, ended up falling in love with him. Not hard considering hwo good Mike is.......

Now, on the tv.
John has given me alot of help on the last stumbling areas of the set, and, it looks like with some additional mods., the set will soon play again.
Unfortunately, this includes disconnecting the cathode from the filament of the orig. 6W4 damper socket, and, changing tube to a 6AU4. My new old stock 3,000 volt filament transformer failed, and, was arcing, and, blowing fuses.
Thank you very much for your help John. I look forward to getting it back playing soon.
Bill Cahill

Now my concern is whether to use it, or, not. I'm afraid it isn't going to be reliable now.. Any opinions??
Bill Cahill

I'd trust it. I mean, it's half new parts at this point. It should be fine. Use it, enjoy it. I mean, what's the point in spending time and effort fixing something if you're not going to use it once it works? (Well, besides the fact that fixing things is fun). If you're just going to let it sit and never turn it on, then it might as well be broken like it was when you found it.

And, you probably have the circuit memorized at this point anyway. It will be easy to fix should something break. It should last for a good long time, and in the meantime, keep your eyes open for spare parts or parts chassis.

Use it!

-Ian

John Folsom reports in e mails to me he has neatenned up connections by me, someone else, and, company.
Mistakes were made by all, especially me.
He had problems with it also.
Couple nights ago it went with a bang, and, flamed out two resistors.
My 3KV insulation, new old stock fil. transformer for damper failed. It was arcing internally.
He showed me pictures of it playing last night. I don't like the coarseness of the picture, however.
It still has other issues, as well.
He's going to align it today.
Still think something else is wrong.
Anyway, it's progress. Thanks, John.
Bill Cahill

Here is the latest. Here is a picture of the set playing at John's house last night.
http://i18.photobucket.com/albums/b122/55Bill51/RCAtvfinallyplayingatJohnshouse.jpg

Bill Cahill :yes::thmbsp:

Long hard road, Bill, but I'd say its been worth it...

I'm happy for ya Bill! Cool Beans!
-Tony

Well, I bit the bullet, and, stripped, and, lightly sanded the entire top portion of upper moding all the way around, which had extensive dammage. Just put on the first coat of stain on top edge of cabinet. I used special walnut. That got the depth of color correct. Now, when it dries , I'll rub in deep mahoganny to get the color correct.
When dried, and, I am satisfied, I will start putiing on the lacquer...
I may also do the outside edges of the doors, which also have extensive dammage. The case had a deep dent on the right front corner of the molding. I was able to do a decent repair on that . I need, however, to pick up some colorable patching compound filler to fill in a gouge gap.....

I have almost decided to also re finnish the top front portion of the large molding on bottom front. The front also is dammaged, but not deeply enough to re do it.
Besides, the decal there is mint, and, I want to save that.

I made a simple base on heavy castors for it yesterday, and, have put it above that. It's now 4" above the floor.
However, I wish to get a wider board. It's not wide enough, and, cabinet likes to teeter, which is not acceptable. I have it safe now, but, I still need a better board.

I will be using lacquer on it as the final finnish, as the original finnish was...
It will take time, but, it will look nicer.
Bill Cahill :)

Well, this next week I hope to get the tv done. I just finnished doing the finnishing on top edges of cabinet. Still working on the doors, and, want to work on top section of bottom front molding. Doing some repairs to dammage UPS did shipping repaired chassis back.
Will be soon trying it on bench, and, doing final adjustments, etc.. Then, I'll put set back in its' cabinet, and do final mechanical adjustments..
I will post pictures when done....
Bill Cahill :tresbon::banana::yes::thmbsp: