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
  #16  
Old 08-23-2012, 01:12 AM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,085
I was thinking it would be a nice way to test them before bothering to rebuild them.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #17  
Old 08-23-2012, 08:55 AM
vts1134's Avatar
vts1134 vts1134 is offline
Looking For Time
 
Join Date: Apr 2011
Location: Pittsburgh, PA
Posts: 1,532
Quote:
Originally Posted by bandersen View Post
I found one cap held in place by this nifty strap and was able to reuse it.
Very handy Anyone know where I can get more ?
We order them by the 100s at work. Let me know if you'd like some and I can ship em your way.
Reply With Quote
  #18  
Old 08-23-2012, 08:59 AM
old_coot88 old_coot88 is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 2,541
The only reliable test for those is how well they perform in the set, 'specially in regard to thermal stability during the heating/cooling cycle.
Reply With Quote
  #19  
Old 08-23-2012, 10:09 AM
N2IXK's Avatar
N2IXK N2IXK is offline
Technohippie
 
Join Date: Apr 2011
Location: Sittin' on the "Group W" bench...
Posts: 799
Home depot sells those straps. Called "Screw Mount Cable Ties". Look in the electrical aisle. You can get them in White or Black (UV Resistant).
Reply With Quote
  #20  
Old 08-23-2012, 10:38 AM
Eric H's Avatar
Eric H Eric H is offline
Administrator
 
Join Date: Jun 2002
Location: So. Calif
Posts: 11,565
We have those straps at work too, very handy but "Unauthentic" in a vintage TV.
Reply With Quote
Audiokarma
  #21  
Old 08-23-2012, 10:40 AM
Eric H's Avatar
Eric H Eric H is offline
Administrator
 
Join Date: Jun 2002
Location: So. Calif
Posts: 11,565
Quote:
Originally Posted by Phil Nelson View Post
Plugability seems low priority to me. If you build a new network, it may outlive everyone reading this post.

Phil Nelson
Those modern Micas and Metal Film? caps are probably good for a hundred years or so. Of course, that's what they thought about Sprague Bumblebees too.
Reply With Quote
  #22  
Old 08-23-2012, 01:57 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,085
Quote:
Originally Posted by Eric H View Post
We have those straps at work too, very handy but "Unauthentic" in a vintage TV.
True, but the original can cap is gone. Hmm, that reminds me I have a scrap Motorola TS-23 chassis with a very similar cap. Maybe I'll restuff that one for this set

Quote:
Originally Posted by Eric H View Post
Those modern Micas and Metal Film? caps are probably good for a hundred years or so. Of course, that's what they thought about Sprague Bumblebees too.
Sure, but I'm hoping I won't have to replace all of them. I have five Predictas to restore each with a few networks on the PCB. So I was thinking if I put some socket pins in on of the sets, I could test all the networks before bothering to replace them. Also gives me a way to test the reproduction networks easily.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery

Last edited by bandersen; 08-23-2012 at 09:38 PM.
Reply With Quote
  #23  
Old 08-24-2012, 03:15 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,085
Quote:
Originally Posted by marty59 View Post
Looks like a clean non-smoker chassis at least. The wires on my Predicta are a sticky, fragile mess that I contend with. That filament resistor is just horrible as mine was opened up/burnt at one spot as well as the leads being all covered with that green corrosion....

Those 12CA5 audio output tubes like to run hot and ruin sockets as you know!
The wires in this set were pretty sticky too. I cleaned them off with lacquer thinner as best I could. I wonder why they used a mix of cloth and plastic insulated wires

The nasty old filament resistor has been replaced These silicone coated Dale power resistors should hold up for a long time.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #24  
Old 08-24-2012, 05:52 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
Workin' Late Again
 
Join Date: Jan 2011
Location: WI
Posts: 3,824
Quote:
Originally Posted by bandersen View Post
I wonder why they used a mix of cloth and plastic insulated wires
Philco parts buyers probably found a deal on some NOS, or it was left over from an older model run. I really doubt they were worried about authenticity at the time.
Reply With Quote
  #25  
Old 08-24-2012, 07:36 PM
Don Lindsly Don Lindsly is offline
Ex-Philco
 
Join Date: Jul 2005
Location: Colorado
Posts: 450
Vendor components usually have plastic insulation. Philco parts and chassis wiring is usually cloth covered wire. Manufacturing Engineering called out the colors and sizes according to Philco practices.

Production wiring was cut and tinned weeks in advance by machine and placed on the line at the position where it was to be used. No one would have wasted time separating wires hoping to find some unused lengths for use on another product. Even tubes and parts that dropped on the floor were not salvaged. They were continuously swept up and discarded.

At the end of a production run, unused material was discarded by the ton.

Don
Reply With Quote
Audiokarma
  #26  
Old 08-24-2012, 10:22 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
Workin' Late Again
 
Join Date: Jan 2011
Location: WI
Posts: 3,824
Thanks, Don. Pretty interesting to hear it from someone that experienced how it all played out. Sort of like having our own Philco time machine here on VK.
Reply With Quote
  #27  
Old 08-28-2012, 02:40 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,085
Yes, thanks for the info Don. I see now that the main chassis wiring like for the AC line is cloth while the wiring harness for the tuner and control cluster is plastic.

I finished with replacing the paper caps and moved on to restuffing the electrolytics.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #28  
Old 08-29-2012, 01:03 PM
MAGICBRAIN's Avatar
MAGICBRAIN MAGICBRAIN is offline
VideoKarma Member
 
Join Date: Dec 2007
Posts: 4
If you still need the tube socket, Surplus Sales of Nebraska has some very similar to the originals.

http://www.surplussales.com/Tube-Soc...ubeSkts-2.html
__________________
Bruce
Reply With Quote
  #29  
Old 08-30-2012, 02:38 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,085
Thanks. I'll pick some up.

I managed to arrange the new caps so they'll just fit in the old cans.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #30  
Old 08-31-2012, 11:41 PM
mpatoray's Avatar
mpatoray mpatoray is offline
VideoKarma Member
 
Join Date: Apr 2010
Location: Near Youngstown Ohio
Posts: 258
Nice work Bob,

i see some Low ESR caps in that lot, i am assuming all of the caps are 105 degree caps.

Looking forward to another progress video for this set.

Matt
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 03:06 AM.



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