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-   -   New Member, new-to-me set, new adventures! (http://www.videokarma.org/showthread.php?t=248799)

ChrisW6ATV 02-19-2011 12:53 AM

Yes, that is usually a good method. The Photofact manual my have a CRT removal/replacement procedure in it as well.

Phil Nelson 02-19-2011 09:08 AM

I'd plug away and finish replacing capacitors, and then worry about the rest.

Don't forget the electrolytics. I usually do them first, since the rest of the TV is pretty irrelevant if you have a crippled power supply. It would spoil your day if a filter croaks and burns up your power transformer.

A little dripped wax under a flyback is common and not a horrible sign in itself. I have sets in that condition which play reliably.

The HOT lead may be ugly, but it's working well enough to display a full raster. Like the dirty safety glass, I'd leave it until later. Once you have a sharp, brilliant picture with strong audio, you can worry about such details.

Regarding new non-polarized caps, to make life simple I usually buy everything with a 630V voltage rating even if the original was rated lower (200V, 400V, whatever). When manufacturers were ordering in huge quantities, they could save money by using the lowest-rated cap that worked in a given circuit. You are not buying in bulk and a cost difference of one or two pennies is not worth your attention.

Have fun! By coincidence, I recently got a couple of 1957-1958 sets (one RCA, one Philco) and both have triple speakers. They're not in a condition to compare, but I suspect RCA might win a Pepsi challenge, as it has a crossover network with tweeters & woofer, not just three speakers wired in parallel.

Let me know if you're still missing a schematic page. I can download many Sams for free via the local library subscription.

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

marty59 02-19-2011 09:29 AM

Quote:

Originally Posted by ChrisW6ATV (Post 2995460)
Yes, that is usually a good method. The Photofact manual my have a CRT removal/replacement procedure in it as well.

And have the procedure for removing the safety glass! You shouldn't have to remove the CRT.

compu_85 02-19-2011 09:58 AM

1 Attachment(s)
Quote:

Originally Posted by Phil Nelson (Post 2995466)

Don't forget the electrolytics. I usually do them first,
...I suspect RCA might win a Pepsi challenge, as it has a crossover network with tweeters & woofer, not just three speakers wired in parallel.

Let me know if you're still missing a schematic page. I can download many Sams for free via the local library subscription.

Thanks for the tips. I did get new electrolytics, but forgot to get terminal strips. Now that I've had a chance to look at things I don't think I'll restuff the cans... there's tons of open space under the power transformer and I can mount the strips to its attachment screws, so I don't have to make any holes in the chassis... just extend the wires.

For a while I removed all the high voltage tubes and used the set as an amp for my phone playing Pandora. My set also has the 3 speaker setup w/ a lill crossover. It sounds fantastic. It has descent power too, on the bassy stuff it had enough umph to make the grille cloth vibrate visibly. I'm hoping it sounds even better after the recap, the higher you had the volume the brighter the audio got.

The HOT lead fell apart as I moved the chassis. So i'll need to repair it before I power things up again.

http://videokarma.org/attachment.php...1&d=1298131409

If you could nab me a copy of the diagram I'd be very appreciative :) Looking through this one there are no directions for removing the CRT or safety glass, just removing the tuner and chassis. Whoever put in the crt was sloppy, the nuts were hardly finger tight and are 3 different sizes :eek:

-Jason

Phil Nelson 02-19-2011 12:36 PM

I have the Sams (folder 346-11). If you send me a PM with a regular email address, I'll email it to you.

You might want to edit your very first post in this thread. The label on your back cover says 21-D-7447 but your post gave a different (nonexistent) model number.

The HOT lead falling apart is clearly an omen telling you to replace the electroytics before tempting fate again :)

Phil Nelson

compu_85 02-26-2011 10:09 PM

So I've started doing the electrolytics, but I've run into a problem... The cans' terminals are not marked. I got one unmounted for a better look, and I can't see anything resembling the symbols listed on the side. Am I missing something? I tried to get as much of the leaked tar / goo off of the terminals as I could.

old_coot88 02-26-2011 10:52 PM

Quote:

Originally Posted by compu_85 (Post 2996164)
So I've started doing the electrolytics, but I've run into a problem... The cans' terminals are not marked. I got one unmounted for a better look, and I can't see anything resembling the symbols listed on the side. Am I missing something? I tried to get as much of the leaked tar / goo off of the terminals as I could.

The symbols should be stamped in the phenolic base next to the terminals.
Bill(oc)

compu_85 02-26-2011 10:57 PM

That's what I thought too, but there are no markings on either :(

wa2ise 02-26-2011 11:41 PM

Quote:

Originally Posted by compu_85 (Post 2996180)
That's what I thought too, but there are no markings on either :(

The symbols are little cutouts in the phenolic material right next to the terminals.

compu_85 02-27-2011 12:26 AM

Ah, I see it now... the symbols are right on the edge where the terminal goes through. Tar had oozed out through the symbols, when I scraped it off things became a lot more clear.

compu_85 04-04-2011 09:09 PM

2 Attachment(s)
Slow progress. Bending over that edge took me quite a while, but I finally got one of the cans taken apart:

http://www.videokarma.org/attachment...1&d=1301969271

You can see how the paper was starting to dry out around the edges:

http://www.videokarma.org/attachment...1&d=1301969271

How many licks to the center of a tootsie pop? The world my never know... but there was about 6' of rolled up foil and paper in the can.

-J

compu_85 04-24-2011 07:57 PM

Well, my employment has changed suddenly and I'll be moving to VA in 2 weeks :eek: I need to decide if I want to bring this project with me. Decisions decisions.... I'm trying to sell as much of my computer collection as I can. We'll see how that goes...

Phil Nelson 04-24-2011 08:17 PM

Well, you got a raster and you've put a fair amount of effort & parts into it. Also it's a blonde cabinet.

On the other hand, I know what it's like to have too many unfinished projects cluttering up the place . . . .

Phil Nelson

Sandy G 04-24-2011 08:23 PM

Where in Viginny ? I'm about an hour or so from Bristol/Abingdon...

compu_85 04-24-2011 09:14 PM

Arlington :)

Sandy G 04-24-2011 09:48 PM

Oh...Northern Virginia...a WORLD away from SW Va...a lot of Virginians think Va kinda peters out after Roanoke...And Bristol/Abingdon/SW Va is strictly "Here There Be Tygers" territory...(grin)

compu_85 04-30-2011 12:29 PM

It's been decided there's no room for this in the truck :( I'll give it to someone if they can come pick it up.

-J

Jeffhs 05-04-2011 10:09 PM

You will be only five miles from Washington, D. C. in Arlington, Virginia. (Looked it up on Bing before starting to write this, and was there on vacation with my dad in the summer of 1978.) I don't know where you are in Michigan (Detroit area is my best guess), but I'd venture to say living and working in the Washington area will take some getting used to, after having been in the Midwest any length of time.

I hope as well that you can find someone to take that TV off your hands before you move. I know how that is, as I had a basement full (well, half full, anyway) of old TVs in the early seventies. We moved in 1972, so almost every one of those sets had to go -- including a 1963 Zenith K-2739 23" VHF-only set I had just retubed and had working like a Swiss watch. I was able to bring three sets with me, one being a 1961 Philco "Briefcase 19" portable, but the rest of them were trashed (bear in mind, this was decades before the Internet and VK). As we were on a very tight schedule at the time, I had next to no time to find new homes for 99.9 percent of my old sets, so the trash was, unfortunately, the only other option I had. :no:

compu_85 05-07-2011 10:40 AM

I was able to send the set to my parent's house to live for a while, I hope to bring it out here eventually and finish the restoration :)

-J

electroking 05-09-2011 12:51 PM

Interesting project! Good luck with your new job, hope you can get the TV working
OK someday.

VintagePC 05-09-2011 06:01 PM

Quote:

Originally Posted by compu_85 (Post 3001684)
I'm trying to sell as much of my computer collection as I can. We'll see how that goes...

Must.... resist... :para: :para: :dammit:

I think it's probably a good thing you're not nearby...


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