|
|
|
#1
04-11-2025, 10:04 AM
|
|||
|
|||
|
Duncan's 1958 Philco Predicta Holiday TV thread
After restoring my 1960 Maganavox, I was looking for a new project.
(thread here) I picked up my first Predicta TV! I've always been on the search for one of these. This will be a build thread about repairs done to this model. I think this is a 1958 Model year, Model G4242M. Ordered a photofact folder, waiting for that to arrive. Seems to have an issue with the vertical output circuit, all the capacitors are original. Will be removing the chassis soon to replace those and test the tubes. High voltage cage is 100% missing. Not sure where I can find another. Also missing adjustment knobs.  PXL_20250409_001820168 by Thomas Duncan PXL_20250409_014635287 by Thomas Duncan PXL_20250409_015304551.NIGHT by Thomas Duncan PXL_20250409_023446326 by Thomas Duncan Screenshot_20250411-094355 by Thomas Duncan
__________________
Duncan Houston, TX 1960 Magnavox 
|
|
#2
04-11-2025, 11:12 AM
|
||||
|
||||
|
IIRC the ETF has free downloads of the Sam's for this on their website.
__________________
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
|
|
#4
04-11-2025, 12:15 PM
|
||||
|
||||
|
Quote:
 All the ETF info on philco is here. https://www.earlytelevision.org/tv_s...ms_philco.html Just find the one that is right for your set. 
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
|
|
#5
04-11-2025, 12:23 PM
|
||||
|
||||
|
Quote:
Another " BIG MOMMA MAGGIE" 24AHP4 owner?  Don't expect that CRT to last very long! they were very short lived, the one I have is almost dead!
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
|
| Audiokarma |
|
#6
04-11-2025, 12:34 PM
|
||||
|
||||
|
Quote:
Yama already linked you.
__________________
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
|
|
#7
04-16-2025, 05:20 PM
|
|||
|
|||
|
Started removing the chassis today. When removing the HV rectifier tube it seems I tore the lead off the flyback transformer.
Based on the diagram, it only has 1 wire, I think I can solder it back on. Although on further inspection, I found the High voltage cable to the CRT covered in electrical tape. I think I should replace this cable, but will need to source a part. Send me a PM if you have either a flyback or HV cable! (sent Moyer electronics an email to see if they have one) Philco 32-8853-1 Or Thordarson FLY 196  PXL_20250416_211931175 by Thomas Duncan, on Flickr PXL_20250416_211947564 by Thomas Duncan, on Flickr PXL_20250416_215904771 by Thomas Duncan, on Flickr PXL_20250416_215917947 by Thomas Duncan, on Flickr PXL_20250416_212223555 by Thomas Duncan, on Flickr PXL_20250416_212558863 by Thomas Duncan, on Flickr PXL_20250416_212740986 by Thomas Duncan, on Flickr PXL_20250416_213140780 by Thomas Duncan, on Flickr PXL_20250416_213416126 by Thomas Duncan, on Flickr
__________________
Duncan Houston, TX 1960 Magnavox
|
|
#8
04-16-2025, 06:19 PM
|
||||
|
||||
|
Ah, that's a shame. I think removing and inserting that HV cable is the single most difficult part of restoring Predictas.
It's unlikely (but not impossible) to find a replacement flyback given the demand. I suggest you attempt a repair. Get yourself some Super Corona Dope to paint over the repair and cracked wax coating. Nothing special about the HV wire. Get some rated for 25kV or better. Could be someone cut it to make pulling the chassis easier rather than trying to pull it out of the socket. I've posted a ton of videos about restoring these sets that you may find useful if you haven't already seen them. Tips: https://youtube.com/playlist?list=PL...F5K780eNgJfybB A series of 21" sets with chassis like yours: https://youtube.com/playlist?list=PL...FeyZNmXLktdYHm
|
|
#9
04-17-2025, 12:57 AM
|
||||
|
||||
|
Hi to all,
Hi Mr.Duncan, about rescueing flyback transformers, may i suggest you read the following thread. The tar in the flyback is dissolved by a (several day) bath in paint thinner, then coated with several coats of Marine-grade Spar varnish. Many photos & step-by-step "how to do it". The process was pioneered by ACORNVALVE, a much respected & experienced TV restorer. None of his processed flybacks have failed after treatment, even many years later. Web site is ARF (Antique Radio Forums), TV subsection. https://antiqueradios.com/forums/viewtopic.php?t=444436 This guy builds & sells modern replacement "couplates" for Philco Predictas. Couplates are passive R & C components assembled in a sort of primitive integrated circuit. https://tvrestorerguy.com/ Finally, beware of cooked tube sockets, especially power tubes. Predicta cabinets are badly ventilated, internal temperature can be high and the cheap quality bakelite circuit boards can cook and become brittle. Best Regards jhalphen Paris/France Last edited by jhalphen; 04-17-2025 at 01:18 AM.
|
 |
|
|
Linear Mode
