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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Sun 21, 2018 5:08 am 
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Posts: 1150
Location: Waxahachie Texas
A trip up to the local Walmart produced another bottle of paint. "Toasted Marshmallow" it is.

I redid the lettering on the cabinet and Channel Plate. After it dries tomorrow, I'll clean them both up and outline what I'm doing to mount the Channel Plate.


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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 3:14 am 
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Joined: Jan Sun 18, 2015 5:01 am
Posts: 1150
Location: Waxahachie Texas
Channel Plate.
I used my heat gun and gently heated and flattened out the plate the best I could. After trying to fit it back onto the cabinet, I could see that the plate had shrunken some. To get the plate to lie flat I filed the round mounting holes till it fit properly and centered over the hole in the cabinet.
With the holes filed out I knew the brass retaining clips won't work. So I came up with the idea of using some #6 flat washers and some 1/8" model airplane fuel line. The fuel line is a tight fit over the mounting posts. The washers are just the right size to go over the posts and then the fuel line can press against the washers "pulling" the Channel Plate onto the cabinet. The pieces of fuel line were left long so if I had to remove them I could grab it with a pair of pliers.


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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 3:17 am 
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Location: Waxahachie Texas
I then recreated the 3 labels. Two for the chassis and one for the back. Not an exact copy but real close!

Once the 2 labels were applied the chassis was done!


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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 3:19 am 
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Location: Waxahachie Texas
The cabinet parts were reassembled and the chassis slid home and screwed down tight!


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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 3:25 am 
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Location: Durham, NC
Doggone, that's gorgeous!

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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 5:30 am 
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Location: Waxahachie Texas
I changed out the interlock cord and replaced the label.
On the interlock I used 2 small nylon spacers 1/4 diameter and 1/4 long. Then used 2 rivets and peened the end over.


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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 5:30 am 
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Location: Waxahachie Texas
aj2x wrote:
Doggone, that's gorgeous!


Thank you!

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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 6:54 pm 
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Location: Dallas, TX
Excellent work as usual!
I like the fuel tubing idea. I bet the dial plate (and possibly the knobs) is early Tenite.

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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 7:20 pm 
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Location: Waxahachie Texas
Notimetolooz wrote:
Excellent work as usual!
I like the fuel tubing idea. I bet the dial plate (and possibly the knobs) is early Tenite.


Thanks. Probably.

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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 7:23 pm 
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Location: Waxahachie Texas
I missed posting these photos of O'scope curves I took during alignment. The first one shows the initial response curve before I tweaked anything. Then the rest are self labeled.


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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 7:24 pm 
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Then these are from the RF and Mixer adjustments for channel 4. BTW, channel 3 looks very similar.


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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Mon 22, 2018 8:17 pm 
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Location: Waxahachie Texas
Just to include a summary of what was changed during the restoration.

Capacitors:
This chassis has about 72 caps.
21 paper caps that were all changed
6 electrolytic caps that were all changed
There were 4 disc caps that I changed that were on the high side of tolerance.
There were 6 mica caps that were changed. 2 were from the IF can on the tuner. 2 were 1Kv caps that were in tolerance but were changed because of the high voltage rating, the other 2 were in tolerance but changed anyway.
For a total of 37 caps changed or 51%.

Resistors:
This chassis has about 72 resistors. All were changed.
54 resistors were out of tolerance. Some just barely all the way up to 278%.
Of the 18 left, 6 were just a few points from being out of tolerance and were changed anyway.
Of the 12 left, they were well within tolerance. 4 of them from the tuner that got changed while I was "in there" changing the 4 resistors that were out of tolerance.
So looking at percentages:
75% out of tolerance
8% close to being out of tolerance
17% well within tolerance.

Tubes:
18 tubes - 1 was shorted when I received the TV.
4 were on the low side of green.
The 5Y3G rectifier tube was installed but should have been a 5U4G tube due to the transformer being one of the small percentage chassis that got a transformer from a vendor that didn't quite meet the specs for using a 5Y3G tube.
The 7JP4 CRT displays a good picture, not a great one but a very good one though.

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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Jan Wed 24, 2018 5:48 pm 
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Wow. I'm jealous. What a beautiful looking set! Excellent work!


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 Post subject: Re: Scored an Admiral 19A11
PostPosted: Feb Sun 18, 2018 10:25 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1299
Location: Phoenix, Arizona
That Admiral is about as clean a set as I have seen lately.

These are great working sets.

Those HV caps in the sweep circuit can't have survived though.

I have one I restored and the biggest problem is the plastic window in front of the CRT is wavy. I have a better one but it is too easy to break off the Bakelite studs to try and get it out.

I have a assortment of pots and coils I would give free to someone who needed them. Came from ann ebay lot I bought to get knobs and the tuner mounting frame.

Jim


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