Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Early B&W and Projection TV

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 08-08-2018, 11:14 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
Predicta Debutante Restoration

I got this TV last fall and now that other people's projects are nearly all done, I'm starting on my own project. I messed with this TV just a little in February. Then the other people's projects for the nearly the last 5 months.

On with the show!

Here is the TV as I got it. The 17" CRT tested very good!





The chassis number is a 11L43.


Here is what the chassis looked like after I pulled it from the cabinet:


And a few pictures after going to the car wash.


Reply With Quote
  #2  
Old 08-08-2018, 11:25 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
I decided to make up all new networks like I did on my Seventeener II project.
I used my CAD program DeltaCad. I used the Seventeener II drawings a "seed" to come up with the ones I needed for this project.
I etched my boards, then populated them. Then they were coated with 15 minute epoxy on both sides.
Once cured, they were spray painted to approximate the original colors.




Last edited by Crist Rigott; 09-23-2018 at 09:10 AM.
Reply With Quote
  #3  
Old 08-08-2018, 11:42 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
I decided not to re-stuff the electrolytic caps. Instead I used the method that Bob Andersen describes in his videos on his restoration of a Princess/Debutante. I still have to pull the main board, and when I do, I'll place the 3 electrolytic's from the small E-Cap.

First up were the 2 200uf 160V caps. I used some 220uf 250V 105 degrees Nichicon caps. They were placed on the terminal strip that is next to the Fusistor. One was a direct replacement on the terminal strip while the other came "from" the large 4 section E-Cap. While I was messing around with the terminal strip I replaced the 2 original diodes with 2 1N5408 diodes.





The other 3 that came "from" the large E-Cap was attached to the terminal strip located between the main board and the IF board.





I then removed several wires that were not needed and the "jumpered" the wires where they would have connected to each E-Cap terminal.

Reply With Quote
  #4  
Old 08-09-2018, 07:10 AM
decojoe67's Avatar
decojoe67 decojoe67 is offline
VideoKarma Member
 
Join Date: Apr 2011
Location: Long Island, NY
Posts: 1,322
Nice work so far. You have the motel version ID'd by the white cabinet, antenna delete, and instruction sticker. I have the regular brownish-grey consumer version. That model has always been my favorite Predicta because it's the last model offered in '59, and the cleanest design of them all. I love the expanse of glitter-woven cloth on the front too. Very "mid-century" looking.
Good luck with the resto!
Reply With Quote
  #5  
Old 08-09-2018, 11:24 AM
mr_rye89's Avatar
mr_rye89 mr_rye89 is offline
VideoKarma Member
 
Join Date: Jul 2015
Location: The Luna's
Posts: 428
Top notch work on those PEC networks!

How did you clean the chassis/PC boards?
Reply With Quote
Audiokarma
  #6  
Old 08-09-2018, 12:43 PM
timmy's Avatar
timmy timmy is offline
VideoKarma Member
 
Join Date: Jan 2011
Location: ferndale ny
Posts: 3,504
he took it to the car wash.
Reply With Quote
  #7  
Old 08-09-2018, 12:46 PM
DavGoodlin's Avatar
DavGoodlin DavGoodlin is offline
Motorola Minion
 
Join Date: Aug 2011
Location: near Strasburg PA
Posts: 3,400
Awesome work! I never knew there was a 1961 Predicta and that chassis is nearly identical to a Philco 23" console I have. That "cool chassis" design sure beat the hell out of the earlier "warm chassis" Predictas
__________________
"When resistors increase in value, they're worthless"
-Dave G
Reply With Quote
  #8  
Old 08-09-2018, 04:25 PM
decojoe67's Avatar
decojoe67 decojoe67 is offline
VideoKarma Member
 
Join Date: Apr 2011
Location: Long Island, NY
Posts: 1,322
Quote:
Originally Posted by DavGoodlin View Post
Awesome work! I never knew there was a 1961 Predicta and that chassis is nearly identical to a Philco 23" console I have. That "cool chassis" design sure beat the hell out of the earlier "warm chassis" Predictas
I've been researching vintage TV's for many years and have never seen any period literature proving a Predicta was for sale to the public after 1959. The '58's were the 21 inchers, and the '59's were 17, with the Debutante being in the final run in '59 and the cheapest model.
Reply With Quote
  #9  
Old 08-09-2018, 05:12 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,085
Wasn't the Continental (AKA danish modern) model introduced in 1960 ? It used essentially the same chassis as the 17" models but with a better 21" CRT than the original 1958 models.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #10  
Old 08-09-2018, 05:36 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
I then did the IF board. It was simple to remove. After a good cleaning, all the resistors were replaced with 1W. I then added solder to each ground stud to beef them up. I also checked each coil. All was good.
After the board was installed, I wrapped each wire around its stud 1 or 2 turns. Then cut off the excess wire leaving a small 3/32 end sticking out. This is to aid in removing the wire in the future. Then each one was soldered.






Last edited by Crist Rigott; 08-09-2018 at 05:48 PM.
Reply With Quote
Audiokarma
  #11  
Old 08-09-2018, 05:38 PM
decojoe67's Avatar
decojoe67 decojoe67 is offline
VideoKarma Member
 
Join Date: Apr 2011
Location: Long Island, NY
Posts: 1,322
Quote:
Originally Posted by bandersen View Post
Wasn't the Continental (AKA danish modern) model introduced in 1960 ? It used essentially the same chassis as the 17" models but with a better 21" CRT than the original 1958 models.
I've always heard that Bob, but I've never seen any ads or articles for Predicta's past 1959. I'd have to see one to believe it. It's common knowledge that the Predicta got a bad rap in '58, then tried to improve the set in '59, but the damage was done. It would be hard to understand how Philco would've kept the line going for 2 more years (it's often mentioned the end was '61). Like with this Debutante, they had to sell them off to motel chains to get rid of them in '59!

Last edited by decojoe67; 08-10-2018 at 08:07 AM.
Reply With Quote
  #12  
Old 08-10-2018, 05:17 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
Today I worked on getting the main board removed. I labeled each wire with the "L" designation and then unwound the wire wrap. Then unsoldered the ground links. Once removed I cleaned up the excess solder on the ground studs and cleaned off the board real good.
On to recapping.

Reply With Quote
  #13  
Old 08-10-2018, 08:12 PM
irext's Avatar
irext irext is offline
VideoKarma Member
 
Join Date: Dec 2016
Posts: 69
The car wash approach scares me a bit. How do you ensure that no moisture remains in IF coils etc. Having said that it certainly does the job. I'll be watching your progress with great interest.
Reply With Quote
  #14  
Old 08-10-2018, 08:29 PM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 14,758
Quote:
Originally Posted by irext View Post
The car wash approach scares me a bit. How do you ensure that no moisture remains in IF coils etc. Having said that it certainly does the job. I'll be watching your progress with great interest.
Ain't done the car wash bit, but I do go after really dirty chassis (like mouse house sets) with the garden hose in 'jet' mode...Don't overdo spraying on anything delicate like labels, and let it dry for 2 days to a week before applying power again depending on temp and humidity. If it is summer and there is a good sunny day letting them dry in the sun can help speed the process.
__________________
Tom C.

Zenith: The quality stays in EVEN after the name falls off!
What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
Reply With Quote
  #15  
Old 08-10-2018, 08:33 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
Quote:
Originally Posted by irext View Post
The car wash approach scares me a bit. How do you ensure that no moisture remains in IF coils etc. Having said that it certainly does the job. I'll be watching your progress with great interest.
I bake it in the oven at the lowest temperature for about an hour.

The car wash gets the initial cleaning done. For the "final" cleaning as to what you see here, this is what I do.

After the board was removed from the chassis, a good look see inspection was done to determine the condition of the board. Both boards were in great shape. Then I head over to the sink and turn on lukewarm water. Then I spray the board with "Scrubbing Bubbles" bathroom cleaner. I let it foam for a few seconds, then I use a 1" chip brush I get from Harbor Freight, to gently, but completely, brush the entire board. Getting in between the components. You'll be amazed at how brown the foam will get. Probably from smoking all those years. Then it is completely rinsed off and the process is repeated. Once rinsed off, I shoot contact cleaner into the pots, tube sockets, adjustable coils, and elsewhere I think it needs it. Then into the oven again for about an hour or out in the Texas hot sun.

Last edited by Crist Rigott; 08-10-2018 at 09:21 PM.
Reply With Quote
Audiokarma
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:22 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.