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-   -   Predicta Debutante restoration (http://www.videokarma.org/showthread.php?t=266991)

bandersen 05-13-2016 12:22 AM

Predicta Debutante restoration
 
The owner of the Predicta Pedestal I restored recently dropped off a Debutante. It's got a bright raster and appears to have never been worked on.

It was a dark brown cabinet and the UHF option.
https://farm2.staticflickr.com/1516/...a32759f3_z.jpg

https://farm2.staticflickr.com/1614/...b3075d8b_z.jpg

https://farm2.staticflickr.com/1478/...e5ca836a_z.jpg

While I have the chassis out, I also plan on finally restoring my Princess (top chassis) using the Debutante for a reference. More on that in a separate thread.

https://farm2.staticflickr.com/1557/...6fb25684_c.jpg

Time to get busy!
https://farm2.staticflickr.com/1657/...5761a7d8_z.jpg

bandersen 05-13-2016 12:29 AM

It's dirty, but otherwise looks very good.
https://farm2.staticflickr.com/1599/...3289a407_c.jpg

Almost all the tubes are the original Philcos.
https://farm2.staticflickr.com/1600/...651e0949_c.jpg

I pulled the main board out for a full recap.
https://farm2.staticflickr.com/1605/...06f339f9_c.jpg

This cap has seen better days :yuck:
https://farm2.staticflickr.com/1646/...6ae4767c_c.jpg

Quite to my surprise, I found unused pads for mounting three of the electrolytic caps. It's as if they anticipated there would be caps small enough someday and routed traces and pads for them :thmbsp:
https://farm2.staticflickr.com/1655/...f7e538bd_c.jpg

Radiotronman 05-13-2016 08:01 AM

Very nice set, different from the usual cream colored ones. There's one at an antique mall near me just like it with the stand for $500. Seem's high to me though, but it's mint. After I finally figure out my briefcase 19 and finish my holiday, I think I'm going to move on to one of my two debutantes. Your restorations are a great help to me, thanks!

Electronic M 05-13-2016 04:36 PM

Quote:

Originally Posted by bandersen (Post 3162507)
Quite to my surprise, I found unused pads for mounting three of the electrolytic caps. It's as if they anticipated there would be caps small enough someday and routed traces and pads for them :thmbsp:
https://farm2.staticflickr.com/1655/...f7e538bd_c.jpg

Fascinating! I'll have to remember this if I ever restore one of these.

reichsrundfu 05-13-2016 05:00 PM

Nice day part of the 17" sets us they are transformer chassis which run cooler and are more reliable long term. I just sold my 17" example today at the DVHRC antique radio meet in Kutztown PA. I completely rebuilt it and is a strong daily player. Let it go under $500 but was still a fair price.

bandersen 05-13-2016 10:26 PM

Here it is with the main board recapped and wired back in. A couple of the original electrolytics are still there and will be replaced shortly.
https://farm2.staticflickr.com/1713/...37cc1fa1_c.jpg

We have a picture and sound :banana:
https://farm2.staticflickr.com/1717/...c7869cd6_z.jpg

Then I decided to clean off some nastiness inside the screen cover
https://farm2.staticflickr.com/1607/...6636d6e0_z.jpg https://farm2.staticflickr.com/1552/...809ddb4e_z.jpg

Even better now after some control tweaking :)
https://farm8.staticflickr.com/7395/...60762eae_z.jpg

maxhifi 05-13-2016 10:29 PM

Looks great!

Radiotronman 05-14-2016 10:59 AM

Looks awesome! I wished my Predicta restoration went that smooth. I just started my first and it began with a bad flyback...

old_coot88 05-14-2016 11:55 AM

Quote:

Originally Posted by Radiotronman (Post 3162609)
Looks awesome! I wished my Predicta restoration went that smooth. I just started my first and it began with a bad flyback...

Just curious, did the replacement flyback come as a complete unit, or did you have to re-use the cores, c-clamp, and terminal board?

Radiotronman 05-14-2016 12:00 PM

I haven't got it yet, it's on the way. It's a good original nicely recoated.

bandersen 08-02-2016 02:22 PM

I finally finished replacing the eletrolytics and put the set back together.
https://c7.staticflickr.com/9/8656/2...7c8cc069_z.jpg

https://c2.staticflickr.com/9/8672/2...c1c197cf_z.jpg

I was careful to follow the lead dress instructions in the service manual. That includes keeping the video signal away from the other CRT and yoke wires.
https://c2.staticflickr.com/9/8431/2...024ac90f_z.jpg

Not perfect but pretty respectable linearity I think.
https://c1.staticflickr.com/9/8563/2...2d7b41d9_z.jpg

https://c1.staticflickr.com/9/8153/2...51c5434a_z.jpg

The picture is quite bright and easily viewed in a well lit room. I think the owner will be happy with it :yes:
https://c1.staticflickr.com/9/8869/2...aeed4693_z.jpg

DaveWM 08-02-2016 02:59 PM

Predictas seem to draw a lot of bad press, but I like working on them. the unitized construction of the transformer chassis makes them easy to pull and fit on the bench. And as you can see, they make a pretty good pic when well setup (nice work btw).

bandersen 08-02-2016 05:13 PM

Thanks. The more I work on them, the more I like them too.

While working on this set I've also been restoring a Predicta Princess. It's one of the first sets I ever acquired and I think the first I ever posted about here: http://www.videokarma.org/showthread.php?t=226707
https://c6.staticflickr.com/4/3429/3...529d86594a.jpg

I'll start a new thread on it soon. Then moving on to a pair of Dumonts...

https://c1.staticflickr.com/9/8221/2...b3abd8dc90.jpg

Radiotronman 08-02-2016 11:24 PM

Another great Predicta restoration Bob. Interesting mention of the lead dress of the video cable. I wonder how much effect it has to seperate it like that, when they will be near each other as they go to the board?

bandersen 08-02-2016 11:55 PM

Video lead plugs into the board but the rest plug into the flyback cage. No problem keeping them away.


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