View Full Version : 1951 AMC 16" TV Restoration


Crist Rigott
07-09-2016, 08:40 AM
Guys,
I've just started on this TV. First a little history. It was bought in 1951 (the year I was born) at a department store in downtown Cleveland Ohio named Higbee's. This store was the downtown store in the "Christmas Story" where Ralph sees the Red Ryder BB gun.

I saw that it was for sale and bought it. The guy selling it said it was his uncle's and told me the story of where his uncle bought the TV. Well I'm from Cleveland Ohio and that's the connection. I had to restore the TV.

I got the Sams #111-3 and the Riders Volume 5 page 1 for reference.

I checked the CRT, a 16KP4, and it took about 1/2 hour to come up into the middle of the green on my BK 467. Not great, but it looks like it will give a decent picture.

I pulled the chassis and installed some 1/2 x 1 inch nylon "feet" so I could grip the chassis to flip it over and the nylon prevent the bench from getting all torn up from the original mounting screws.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/Front%20View_zpsesmdofv8.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/Front%20View_zpsesmdofv8.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/Back%20View_zpszifrcjwm.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/Back%20View_zpszifrcjwm.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/IMG_5258a_zpsk7piaono.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/IMG_5258a_zpsk7piaono.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/IMG_5215b_zpseolnm5nz.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/IMG_5215b_zpseolnm5nz.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3531a_zps0fvm0tel.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3531a_zps0fvm0tel.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3532a_zpsgc8zcm3h.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3532a_zpsgc8zcm3h.jpg.html)

Crist Rigott
07-09-2016, 08:43 AM
I then removed the picture tube for safe keeping. Then removed both the HV rectifier and low voltage rectifier tubes. I put it on my variac and brought the voltage up to 40vac while checking the current draw. Less than 1/4 amp - good. After awhile I added more voltage to check to see if the tubes would glow. I got up to 70 volts and all the tubes that were plugged in glowed. Enough of that.

I then decided to pull the tubes to check them. I used the SAMS tube location chart nad began pulling tubes, verifying that the correct tubes were installed, then marked them with a small piece of masking tape. When I got to V7 the Detector tube, there were 2 tubes in its place! Whoa, I didn't see that coming. Both Sams and Riders showed a single 6T8 tube. I have a 6AQ6 and a 6AL5 tube. I'm pretty sure this is a factory mod or update. Now I need to find the correct schematic and documentation, if its out there. I included a picture of the 2 tubes on top and below the chassis.

Also there was a 6V6GT instead of a 6K6GT for the vertical output.

I also have a question on "something" that is sticking out of the "back" of the HV cage that is attached to the Flyback transformer. At first I thought it was a fuse. But it looks like the 1/4A fuse in mounted below. Though I'd have to check for sure. What is that something? I've included a picture of it.

The chassis is pretty clean but real dusty. I'll spend some time cleaning it up before I go much further.

I also will research the dual tube modification.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3598a_zpsdskoaczk.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3598a_zpsdskoaczk.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3862a_zpsltlte46r.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3862a_zpsltlte46r.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3873a_zpstoy8bqco.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3873a_zpstoy8bqco.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3875a_zpsvr5emkoi.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3875a_zpsvr5emkoi.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3866a_zps3ighxfdq.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3866a_zps3ighxfdq.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3869a_zpsfqbgdnd8.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3869a_zpsfqbgdnd8.jpg.html)

Crist Rigott
07-09-2016, 08:49 AM
Here's the schematic from Sams.

WISCOJIM
07-09-2016, 09:59 AM
I'm pretty sure this is a factory mod or update.Gotta be factory, the hole was punched when the chassis was just a piece of sheet metal.

.

WISCOJIM
07-09-2016, 10:23 AM
I also have a question on "something" that is sticking out of the "back" of the HV cage that is attached to the Flyback transformer. At first I thought it was a fuse. But it looks like the 1/4A fuse in mounted below. Though I'd have to check for sure. What is that something? I've included a picture of it.
What you are seeing is the flyback core and retaining clamp.

http://www.videokarma.org/attachment.php?attachmentid=191742&stc=1&d=1468077669

.

electronjohn
07-09-2016, 10:26 AM
Cool..."Higbees". The "Old Man" must've bought that to replace the console radio in "A Christmas Story":)

WISCOJIM
07-09-2016, 10:44 AM
Here's the schematic from Sams.Chris - did you seam those pages together, or do you have a scanner that will do 3 pages at once? What model scanner did you use?

.

Crist Rigott
07-09-2016, 10:57 AM
Chris - did you seam those pages together, or do you have a scanner that will do 3 pages at once? What model scanner did you use?

.
I seamed them together using my CAD program. DeltaCad.

I used my cheap Lexmark X1185 printer/scanner. I only use it to scan though.

Crist Rigott
07-09-2016, 10:58 AM
What you are seeing is the flyback core and retaining clamp.

http://www.videokarma.org/attachment.php?attachmentid=191742&stc=1&d=1468077669

.

Yup, now that I have time to look a little closer. Thanks.

David Roper
07-09-2016, 05:07 PM
That's a Muntz design with a handful of parts thrown back in. Unless I'm blind, I see no mechanism for blanking the screen when the phono input is selected.

Crist Rigott
07-09-2016, 05:37 PM
That's a Muntz design with a handful of parts thrown back in. Unless I'm blind, I see no mechanism for blanking the screen when the phono input is selected.

The switch for TV/Phono input is a simple SPDT slide switch. It does look like the TV picture is not turned off. When I get it up and running, I'll check its function.

dieseljeep
07-09-2016, 09:29 PM
That's a Muntz design with a handful of parts thrown back in. Unless I'm blind, I see no mechanism for blanking the screen when the phono input is selected.
There's a capacitor in the bottom with the Bendix name on it. That's probably who made it. Only two IF stages. :boring:

Crist Rigott
07-09-2016, 09:41 PM
There's a capacitor in the bottom with the Bendix name on it. That's probably who made it. Only two IF stages. :boring:

Oh yeah, it's made by Bendix that's for sure. Why do you say that 2 IF stages are boring?

Phil Nelson
07-09-2016, 10:35 PM
Better quality TVs had three IF stages (like my Dumont RA-103), or even four (like my RCA CT-100). More IF stages means more amplification of the incoming signal, resulting in greater sensitivity (ability to pull in weak, far-away stations). A TV with only two IF stages would only have worked well in a metro area with nearby stations.

Sensitivity per se is not such a big deal nowadays, when many collectors feed their restored TVs from a DVD player or whatnot, with a nice strong signal. The number of IF stages can be interpreted as a sign of overall quality, however. If the manufacturer skimped in that area, they may have skimped in others, too.

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

Crist Rigott
07-09-2016, 11:05 PM
Better quality TVs had three IF stages (like my Dumont RA-103), or even four (like my RCA CT-100). More IF stages means more amplification of the incoming signal, resulting in greater sensitivity (ability to pull in weak, far-away stations). A TV with only two IF stages would only have worked well in a metro area with nearby stations.

Sensitivity per se is not such a big deal nowadays, when many collectors feed their restored TVs from a DVD player or whatnot, with a nice strong signal. The number of IF stages can be interpreted as a sign of overall quality, however. If the manufacturer skimped in that area, they may have skimped in others, too.

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

Phil,
Thanks for the explanation. I can see where if they scrimped here they could scrimp there kind of a deal.

When I'm done I'll for sure include some videos of the picture and sound quality.

Again thanks and I enjoy reading over your restorations both radio and TV.

Crist Rigott
07-09-2016, 11:33 PM
Here some more pics. I cleaned the chassis with some mild dish washing detergent. It wasn't real dirty and it cleaned up pretty well.

I checked the tubes and some are weak and some are very weak!

I then got to work on making and ID on every capacitor and resistor and comparing it with the schematic and parts list. There were some discrepancies but nothing real major. I use a small block of masking tape and mark each component. While doing this I check the schematic and parts list. I then make the document changes in red ink.

I also drew out the 2 tube configuration for the listed 6T8 tube. Besides using 2 tubes, there were a few resistors and capacitors in the chassis that weren't in the schematic. I'll update my parts lists accordingly so I get my order right.

I'll draw up the new configuration and I'll post it side-by-side with the schematics so we can see what the changes were.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3895a_zps7yck5hbe.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3895a_zps7yck5hbe.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3896a_zpscnhreihd.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3896a_zpscnhreihd.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3897a_zpssj3erbat.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3897a_zpssj3erbat.jpg.html)

dieseljeep
07-10-2016, 11:24 AM
Oh yeah, it's made by Bendix that's for sure. Why do you say that 2 IF stages are boring?

Even the Muntz had three IF stages. Boring was just a poor attempt at humor. :sigh:
It seems, at the time, just about every set manufacturer used at least three stages of IF.
Bendix also designed the 12" set, using the 6BG6 reflex circuit horizontal osc and output and the damper less hv sweep circuit.
Muntz copied that design, not the other way around. :scratch2:

old_coot88
07-10-2016, 12:01 PM
In order to get fine detail resolution in the pic, the IFs have to be stagger tuned. And stagger-tuning reduces overall gain. Add another IF stage for more gain, and you can stagger-tune for a wider IF bandpass, allowing finer detail resolution. So more IF stages equals better fine detail in the pic.

(Then into the 1960s, high gain IF tubes were developed (e.g., 6EH7, 6EJ7) which allowed good bandpass with just two IF stages.)

broadcaster
07-10-2016, 01:13 PM
That set is a Bendix set. The 2 tube sound mod was due to the FCC allowing TV stations to reduce their Aural power to a percentage of the Visual power. When that happened, some sets, including your Bendix, with only 2 IF stages, had low sound, if they were located in B or worse coverage area. Some companies marketed a 2 tube "kit" to boost the sound. broadcaster

old_coot88
07-10-2016, 03:21 PM
...The 2 tube sound mod was due to the FCC allowing TV stations to reduce their Aural power to a percentage of the Visual power.
Was that with the advent of intercarrier sound?

Crist Rigott
07-10-2016, 09:45 PM
Well I traced out the audio circuit and drew up the changes. I'll attach a pdf of the "before" and "after" the audio mod was done at the factory.

Some comments are in order.

1) SAMS made a mistake and reversed the polarity of Cap C3. This was confirmed by looking at the picture of the resistor location in the actual SAMS folder.
2) I eliminated the extra switching shown on the schematic showing switching for a combo unit. Mine is a table top model.
3) With the audio mod there were 3 components added not counting the tube. R79, R80, and C64. I gave them these designations to continue with the SAMS.
4) R37 was changed from 82K to 1.5MEG, R35 from 10MEG to 5.6MEG, R32 from 12K to 13K.

As a general observation, I noticed that about 10 to 12 resistors are different values from the schematics. Consistent was the change from 47K resistors to 39K and 12K to 11K and 13K. Could have been caused by parts shortages?

You guys that are more knowledgeable than myself, could you look over what I drew up and give me your comments? I drew up what I saw on how the chassis was wired.

Thanks.

tom.j.fla
07-11-2016, 09:10 AM
It's more likely there were parts shortages due to the war going on in Korea at the time. Big brother got first dibs on everything. All the best, Tom

dieseljeep
07-11-2016, 09:50 AM
It's more likely there were parts shortages due to the war going on in Korea at the time. Big brother got first dibs on everything. All the best, Tom

The was my first thought!
There was several firms that didn't use 6T8's. Admiral, RCA, Motorola to name a few.

dieseljeep
07-11-2016, 11:01 AM
Here some more pics. I cleaned the chassis with some mild dish washing detergent. It wasn't real dirty and it cleaned up pretty well.

I checked the tubes and some are weak and some are very weak!

I then got to work on making and ID on every capacitor and resistor and comparing it with the schematic and parts list. There were some discrepancies but nothing real major. I use a small block of masking tape and mark each component. While doing this I check the schematic and parts list. I then make the document changes in red ink.

I also drew out the 2 tube configuration for the listed 6T8 tube. Besides using 2 tubes, there were a few resistors and capacitors in the chassis that weren't in the schematic. I'll update my parts lists accordingly so I get my order right.

I'll draw up the new configuration and I'll post it side-by-side with the schematics so we can see what the changes were.
Looking at your under-chassis view and the schematic, I noticed a low current selenium rectifier in the horiz yoke circuit. That's a new one on me!
I wonder what the reason was? :scratch2:

old_coot88
07-11-2016, 11:11 AM
I wondered about that little selenium too, thinkin' maybe it was a neg.bias supply. But couldn't spy it in the schematic. :saywhat:

tom.j.fla
07-11-2016, 12:15 PM
That's a centering circuit, you found it used alot in newer sets most noteably color sets. The late Jack Darr service editor for Radio-Electronics gave a good description on it. Still trying to find the artical. All the best, Tom

dtvmcdonald
07-11-2016, 06:37 PM
CT-100 (and TRK-12) have FIVE IF stages!

Yes, more gives more gain.. BUT ... it also allows a more sharply
tailored bandpass curve with a very sharp 4.2 MHz cutoff.
Doing the sharp bandpass edges cuts overall gain.

Crist Rigott
07-12-2016, 10:23 PM
The last day or so was spent taking inventory of what parts are needed and making a list and where to get them from. Some I had "in stock" while others will be ordered from Just Radios and Digikey. I've decided to bump up the 1/2W to 1W, the 1W to 2W and the 2W to 3W. Some of the 2W resistors seemed a bit discolored and heat stressed so those 3 will be replaced with 5W (R70, R71, R73). There was one resistor clearly bad. It had split open due to excessive heat. It is R76 a 470 ohm 2W resistor. This will be replaced with a 470 ohm 10W resistor the local parts house had in stock. It will still fit nicely in the chassis.

I'm using the taller, slender Nichicon 105c E-Caps so they'll fit into the cans. There are 2 cans with 3 each caps in them

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3899a_zps9ttinpdr.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3899a_zps9ttinpdr.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3900a_zpsavyd7u63.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3900a_zpsavyd7u63.jpg.html)

Crist Rigott
07-13-2016, 09:25 AM
While I wait for the parts to arrive I'd like to clean up the HV cage. Never having done a TV before with a flyback I could use some guidance. I want to clean this up and of course replace the 2 680K 2w resistors with 2 680K 3w resistors and the .00047 10Kv cap with a .00047 15Kv cap from Just Radios.

It liiks like I could remove the cage portion by unscrewing it from the chassis, removing the flyback mounting screws, and the 1 screw holding the phenolic standoff. Once that is removed I can access the the electrical parts. Here's where I could use some help. I'm thinking of removing the wires from the flyback phenolic board and releasing the clips on the 1B3GT tube socket to completely remove the "guts" so I can work on them on the bench.

My other option is to unsolder the flyback wires from underneath the chassis instead of from the flyback board. I've included close up pictures of what I have to work with.

Also there is a very small separation of the flyback tape on the top of the flyback. Should I look at repairing this or just leave it alone?

What should I use to clean the whole thing off with? I usually use some rubbing alcohol, Q-tips, etc.

While I have it out, is there anything else that needs to be done to it?

Thanks.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3906a_zpssbf3hrcu.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3906a_zpssbf3hrcu.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3911a_zpsc5jnacdu.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3911a_zpsc5jnacdu.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3914a_zpsiquerfnd.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3914a_zpsiquerfnd.jpg.html)

WISCOJIM
07-13-2016, 10:37 AM
Avoid unnecessarily doing anything around a flyback. Those thin wires are very prone to damage.

.

old_coot88
07-13-2016, 11:35 AM
Unless there is a clear and present need for removing the flyback, such a major hysterectomy is ill advised. :eek:

Crist Rigott
07-13-2016, 11:44 AM
OK guys. Then do I just clean it the best I can in place using alcohol and Q-Tips?

Crist Rigott
07-13-2016, 08:51 PM
I decided to work on re-stuffing the existing E-Caps. After I took careful notes on the wires etc, I removed them. After I cleaned the contacts up I took them to my band saw and sawed off the bottom portion of each cap just above the mounting base. Then I used a deck screw and a heat gun to pull out their guts. More heat and a craft stick to gouge out the tar. Some acetone and a wire brush and they were clean. I then trued up the bases using my flat plate sanding bar. Then the tops were trued up using my disc sander and miter gauge.

I then used some 1" thin wall sprinkler pipe with the end trued up like the tops, then it was cutoff 1" long. Then another end trued up, then cut off at 1" again. This gave me 2 pieces of thin wall tubing 1" high with 1 end trued up that I'll use as sleeves. The trued up end will be epoxied to each base.

I cleaned up both bases and sleeves and epoxied them the sleeves to the bases using 15 minute epoxy. I carefully positioned each sleeve to be centered between the walls. The epoxy was applied only to the inside so the epoxy won't interfere with the tops when assembled.

When the epoxy is dry tomorrow I'll polish both tops and bases. It's easier to polish the base because I can grip the sleeve!

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3940a_zpsw7dhctea.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3940a_zpsw7dhctea.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3946a_zpsntyes8y2.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3946a_zpsntyes8y2.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3947a_zpsacuvwrz1.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3947a_zpsacuvwrz1.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3948a_zpslugikzdi.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3948a_zpslugikzdi.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3950a_zps4dv4fojr.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3950a_zps4dv4fojr.jpg.html)

Crist Rigott
07-13-2016, 11:14 PM
After I prepped the E-caps I decided it was time to clean the HV cage. I used alcohol and some places acetone. A lot of Q-Tips later this is what it looks like. I still have to change out the 10Kv cap when my order from Just Radios arrives. The HV cage looks a lot better. I also have to re-solder on the 6BQ6GT grid cap back on the wire. It was hanging on by a few strands when I got the TV.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3964a_zpshmcwg3gd.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3964a_zpshmcwg3gd.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3966a_zpsh6s9gtuw.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3966a_zpsh6s9gtuw.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3967a_zpsyvdpccmh.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3967a_zpsyvdpccmh.jpg.html)

Crist Rigott
07-14-2016, 10:41 AM
The epoxy has dried and I polished out the E-Caps cans. I've included a picture of how they will look assembled. The seam is almost invisible. The friction of the sleeve is all that is needed to hold the tops in place.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3969a_zpslsh7yszm.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3969a_zpslsh7yszm.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3970a_zpsx65kl53w.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3970a_zpsx65kl53w.jpg.html)

WISCOJIM
07-14-2016, 12:33 PM
Great looking job on those cap cans. I've never seen anyone do them so well.

.

Crist Rigott
07-14-2016, 10:44 PM
Great looking job on those cap cans. I've never seen anyone do them so well.

.

Thanks Jim.

Crist Rigott
07-15-2016, 08:45 AM
I re-dressed and re-soldered on the plate cap clips for the 1B3GT and the 6BQ6GT tubes in the HV cage. I made sure there were sharp points. The reason I did this was the plate cap for the 6BQ6GT had fallen off. The wire strands were broken. The plate cap for the 1B3GT was hanging on by just a couple of strands.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3977a_zpshxrmy6co.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3977a_zpshxrmy6co.jpg.html)

Crist Rigott
07-16-2016, 10:00 PM
My E-Cap order came in so I finished up re-stuffing them. Each can holds 3 E-Caps. I used Nichicon slender caps where I can. Each can was able to hold the 3 caps next to each other. No stacking. I use hot glue to glue the 3 caps together with the negative leads close to each other. I then connect the negative leads together and use some solid 22awg 600V wire for the leads. I attached them using the coil method. I then form each lead to make up a bundle coming out from the approx. center. This bundle is laced tied to give it some extra strength. The leads are trimmed and stripped before I insert the caps into the sleeve.

A generous bead of hot glue is placed around the bundle then it is inserted through a 5/32 hole drilled in the bottom. The assembly is held in place till the hot glue sets up. Then the caps are tacked to the wall of the plastic sleeve. The leads are soldered to the contacts. The ground lead is left unattached. It will be connected to the can after it is inserted into the chassis.

I place the cans back into the proper position into the chassis. I then solder the "twist" tabs to the chassis. I'm afraid that they will break off if I twist them. Then the ground lead is attached to one of the tabs soldered to the chassis.

When all done, I'll slide the cans over each assembly to finish off the chassis.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3980a_zpshrrmy9yf.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3980a_zpshrrmy9yf.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3982a_zpsnzrqnv6a.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3982a_zpsnzrqnv6a.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3984a_zpsrtawzbkr.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3984a_zpsrtawzbkr.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3985a_zpsyopenxkl.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3985a_zpsyopenxkl.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3986a_zpsbmy2rgmh.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3986a_zpsbmy2rgmh.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3990a_zpscs2bjptk.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3990a_zpscs2bjptk.jpg.html)

Crist Rigott
07-17-2016, 11:17 PM
I got some more done on the chassis recapping.

I changed out the cap "C46" and resistor "R62"on the "Contrast" and "Horizontal Hold" control.

I then began recapping and rewiring the fuse and selenium rectifier. I'm using a terminal strip for each. I'm using pigtail fuses. For the rectifier, I'll wire the original selenium in then get some voltage measurements, then change it out for a 1N4007 diode. Then I'll adjust the existing 22 ohm resistor "R77" to match the correct voltage needed.

I'm needing my .2uf 630v caps from Just Radios to really get into recapping. The caps are "layered" and I'm not going to do much till I have all the caps on hand. There is some that I can do though. Just a limited amount.

I also changed out another cap "C54" and one of the heat stressed resistors "R77".

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3566a_zpsrd7cps6h.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3566a_zpsrd7cps6h.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4001a_zpstyahjdqk.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4001a_zpstyahjdqk.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3590a_zps1lgczl2z.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3590a_zps1lgczl2z.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3996a_zpsoitp9jg6.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3996a_zpsoitp9jg6.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_3998a_zpskq0ifmro.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_3998a_zpskq0ifmro.jpg.html)

Crist Rigott
07-18-2016, 05:02 PM
My order from Just Radios arrived. I emailed my order to Dave on Wednesday and he mailed it last Thursday. Wow, great service.

My friend provided me with some tubes and other parts so now I have all the parts to complete the restoration.

Stay tuned.

Crist Rigott
07-19-2016, 12:38 AM
This evening I got a few more caps replaced and finished the section around the E-Caps.

I also discovered that my vertical output transformer primary was open. Luckily, my friend had a replacement listed in the Sams parts list. A Merit A-3036. This was also installed tonight.

Tomorrow I'll work on finishing up the HV cage and on to the other film caps.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4007a_zps1x8d2nvg.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4007a_zps1x8d2nvg.jpg.html)

Crist Rigott
07-20-2016, 01:09 AM
I made some good progress today.

The HV cage is done. I replaced the .00047uf 10,000 volt cap with a .00047uf 15,000 volt cap and the 2 680K 2W carbon comp resistors with some new 3W resistors.

I started to replace the paper caps on the section that I started work on. Some of the paper caps were "buried" under other components. This causes a lot of other components to be lifted to gain access. I decided to go ahead and replace all the resistors along with the paper caps in the Horizontal section.

I'm including some pics of my progress. Also a picture of the enlarged schematic that I'm using and I high light the components when they have been replaced. Pretty much the horizontal section.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4008a_zpshkf2l20t.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4008a_zpshkf2l20t.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4023a_zpsffhc2aow.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4023a_zpsffhc2aow.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4026a_zpsou7bdfmm.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4026a_zpsou7bdfmm.jpg.html)

Crist Rigott
07-22-2016, 12:42 PM
My progress so far.

I did an interim power up. I got a raster but low audio and it appeared no tuning.

We'll see what happens on the next power up.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4043a_zpswreabuma.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4043a_zpswreabuma.jpg.html)

Crist Rigott
07-22-2016, 09:53 PM
I finished replacing the caps and resistors.

I now have good audio and tuning.

I do have a problem with the video. It looks like multiple test patterns across the screen. I think I read somewhere that the horizontal frequency might be off? Any suggestions?

I'll go over what I replaced to see if I made a mistake.

The B+ is 329v compared to SAMS 340v.

Thanks for your help.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4048a_zpswe60hbf9.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4048a_zpswe60hbf9.jpg.html)

MIPS
07-22-2016, 10:44 PM
Have you verified that everything in the Horizontal hold circuit is good?

Crist Rigott
07-22-2016, 10:49 PM
Could you be more specific as to what you mean by good? I replaced all the caps and resistors in the circuit. I have will go back and check to see if I made a mistake replacing those caps and resistors.

Crist Rigott
07-23-2016, 01:35 AM
My friend emailed and said to turn the H. Frequency adjustment CCW. It has a wide range. Bingo.

I'll have to put in the 16KP4 tube next to see what it'll really look like.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4050a_zpsj6oalfml.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4050a_zpsj6oalfml.jpg.html)

Crist Rigott
07-23-2016, 08:02 AM
This morning I removed the focus coil off the test CRT. Much better. I'll do some voltage checks and replace the selenium rectifier today. The picture is actually much better in person than the photo.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4051a_zpsn9ruuamj.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4051a_zpsn9ruuamj.jpg.html)

Crist Rigott
07-23-2016, 09:41 AM
Getting better. Here is small clip from White Christmas. With the 16" CRT.

https://youtu.be/5KVM0_c8l4Q

dieseljeep
07-23-2016, 10:20 AM
Getting better. Here is small clip from White Christmas. With the 16" CRT.

https://youtu.be/5KVM0_c8l4Q

The set is in brand-new condition, a real labor of love.
Great to see the CRT is that good. :thmbsp:

Crist Rigott
07-23-2016, 09:22 PM
Thanks for the kind words.

Crist Rigott
07-23-2016, 09:24 PM
I did some more work on getting it done. It is pretty much finished. I have a few details I need to work on. I also want to go through the alignment procedure so I can learn about it. Here the pics.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4067a_zpsrzbnbi3i.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4067a_zpsrzbnbi3i.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4069a_zpsnzmskz8z.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4069a_zpsnzmskz8z.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4070a_zpshyspnq3v.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4070a_zpshyspnq3v.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4071a_zpsi2jjonb5.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4071a_zpsi2jjonb5.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4072a_zpsmm5vbjto.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4072a_zpsmm5vbjto.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4059a_zpsrwzqtf85.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4059a_zpsrwzqtf85.jpg.html)

Phil Nelson
07-23-2016, 10:18 PM
Nice, tidy work. You have made great progress.

Are you using a VCR as a source? The bending near the top of the screen is classic VCR distortion. Many, many vintage TVs have this issue, although they will display perfectly with a DVD player or other non-videotape source.

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

Crist Rigott
07-23-2016, 11:44 PM
Phil,
Yup a VCR. I'll try out my DVD player. Thanks for the tip and kind words.

Crist Rigott
07-23-2016, 11:44 PM
I almost forgot I wanted to glue the CRT base back on. It was just a little loose. I use some glue I got at Walmart labeled E6000. It's high heat, flexible, and bonds glass to plastic and such. I squeeze out some in a small mixing container and add some acetone. I mix it up thoroughly to the consistency of syrup. I then suspend the CRT facing up and "trowel" the glue where the base meets the glass CRT with a round toothpick. I go around the perimeter of the base and as the glue seeps down into the base, I add more glue. When satisfied, I wipe down both the base and the CRT with some acetone. I'll let it dry overnight.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4074a_zpslssxhee6.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4074a_zpslssxhee6.jpg.html)

consoleguy67
07-24-2016, 07:16 AM
Wow, top notch work!!

Crist Rigott
07-25-2016, 11:51 AM
OK, I aligned the video and sound IF using my signal generator and VTVM. I have a good picture and great audio.

I do have some little white bars that go across the top of the screen. See attached picture. Any ideas?

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4076a_zpse6bwdy5n.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4076a_zpse6bwdy5n.jpg.html)

MRX37
07-25-2016, 12:30 PM
Those white lines are very likely from your video source.

Electronic M
07-25-2016, 01:51 PM
They are either closed captioning (which lurks at the extreme top of the frame), or macrovision copy protection (which usually droops down lower).

If you have Cable/Satellite you should watch the AMC channel on your AMC TV set at least once. :D

Crist Rigott
07-25-2016, 05:49 PM
Still looking for some information about hooking up a frequency meter to measure the Horizontal Frequency of 15750 cps. Has anybody done this?

Thanks.

Crist Rigott
07-25-2016, 08:03 PM
I've got the test pattern looking pretty good. There is a "ghost like" squiggle on the right side. I haven't played a DVD yet but I will.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4084a_zpszfrqaf9t.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4084a_zpszfrqaf9t.jpg.html)

old_coot88
07-25-2016, 08:36 PM
That squiggle looks like a bit of H. retrace. See if it'll go away by reducing the brightness a bit.

Linearity that good (both H and V) is seldom seen on a vintage set. The quality of your resto would do a seasoned techie proud. :thmbsp:

Crist Rigott
07-25-2016, 08:44 PM
Wow, thanks old coot88!

And here is a short clip from Veggie Tales. I'm pretty happy with the results.

https://youtu.be/ht_zN7l4fSo

WISCOJIM
07-25-2016, 09:47 PM
I'm pretty happy with the results.

You should be. Excellent restoration. Thanks for sharing it with us.

.

Crist Rigott
07-25-2016, 10:09 PM
Thanks Jim.

Crist Rigott
07-27-2016, 01:43 PM
I was just reviewing the entire thread and came across the discussion about the number of IF stages this TV has (2). Looking at the picture after replacing the caps and resistors, and some tubes, looks like Phil was right about it not mattering so much now-a-days.

Good call Phil.

Phil Nelson
07-27-2016, 08:42 PM
When you are connecting a DVD player, VCR, or other non-over the air source, it's as if you lived two blocks from the TV station in the old days. No need to amplify a signal that's already strong and free of interference.

Phil Nelson

Eric H
07-27-2016, 08:54 PM
Wow, that looks great, now you just got to get the color working...:thmbsp:

Seriously though, you did a nice meticulous job restoring that chassis.

Crist Rigott
07-27-2016, 09:38 PM
When you are connecting a DVD player, VCR, or other non-over the air source, it's as if you lived two blocks from the TV station in the old days. No need to amplify a signal that's already strong and free of interference.

Phil Nelson

Yep!

Crist Rigott
07-27-2016, 09:39 PM
Wow, that looks great, now you just got to get the color working...:thmbsp:

Seriously though, you did a nice meticulous job restoring that chassis.

Thank you.

Crist Rigott
07-29-2016, 09:45 AM
Time to do the knobs. These came with a lot of white gunk on them. What can I use to clean them? I remember Bob Anderson talking about this in 1 of his videos but can't remember which one.

Also I have to polish the bright brass centers. After that I'm thinking of spray painting some clear over the knobs to preserve them.

Crist Rigott
07-29-2016, 12:24 PM
I cleaned and polished the brass brights on the knobs. To polish the brights, I used some Mothers and then Gorhams silver polish. I cut a Q-Tip in half and chucked it up in my drill press. Then I added some compound then polished the brights. I went through several Q-Tips for each knob. When done. I did a little hand polishing with a soft rag and Gorhams to even out the shine.

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4090a_zpss0meh8kt.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4090a_zpss0meh8kt.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4091a_zpsdclxdys0.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4091a_zpsdclxdys0.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_4095a_zpsryrshzwx.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_4095a_zpsryrshzwx.jpg.html)

Crist Rigott
11-17-2016, 12:40 PM
Time to repair the cabinet.

I patched in some mahogany veneer in the chipped out places. These were all on the one side.

After sanding them smooth, I added some grain filler which is drying right now.

http://i1060.photobucket.com/albums/t458/crigotti/Misc/100_5003a_zpspkwzvc6h.jpg (http://s1060.photobucket.com/user/crigotti/media/Misc/100_5003a_zpspkwzvc6h.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/Misc/100_5005a_zpsrucmxril.jpg (http://s1060.photobucket.com/user/crigotti/media/Misc/100_5005a_zpsrucmxril.jpg.html)

Crist Rigott
12-03-2016, 01:49 PM
It is done!

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_5357a_zps7w1nayxr.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_5357a_zps7w1nayxr.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_5361a_zpswv2olucm.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_5361a_zpswv2olucm.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_5360a_zpspqieqnht.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_5360a_zpspqieqnht.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_5358a_zpskkes9oai.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_5358a_zpskkes9oai.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_5346a_zps3ajjo9k2.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_5346a_zps3ajjo9k2.jpg.html)

http://i1060.photobucket.com/albums/t458/crigotti/AMC%20116T%20TV/100_5349a_zpsz1vlldzl.jpg (http://s1060.photobucket.com/user/crigotti/media/AMC%20116T%20TV/100_5349a_zpsz1vlldzl.jpg.html)

Radiotronman
12-04-2016, 08:39 AM
This set turned out great! Great job getting it to look like new too!

kvflyer
12-04-2016, 09:59 AM
Looks very nice. Congratulations and now, you have to sit back and enjoy!

Crist Rigott
12-04-2016, 01:33 PM
Thanks guys!

Steve D.
12-04-2016, 02:13 PM
Crist,

So appreciate the meticulous job you did in the restoration of this set. Thanks for the step by step postings.

-Steve D.

Crist Rigott
12-04-2016, 02:16 PM
Thanks, and you are welcome.