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 09-12-2017, 02:10 AM
MadMan's Avatar
MadMan MadMan is offline
'A Disgusting Brony'
 
Join Date: Oct 2016
Location: Chicago
Posts: 260
I'm thinking of buying this Admiral

https://chicago.craigslist.org/chc/a...300445685.html

The case looks nice. I don't know much about this stuff.

Thoughts?
Reply With Quote
  #2  
Old 09-12-2017, 08:55 AM
electronjohn's Avatar
electronjohn electronjohn is offline
I like....big sparks!!
 
Join Date: Jan 2006
Location: minnesota
Posts: 472
Looks well-worth $60 to me...even has the original back! Restored they're pretty good performers.
__________________

Ham shack...AM side: Knight-Kit T-60, RME-45
Vintage SSB side: National 200
Modern SSB: Kenwood TS-180S
MFJ tuner, 130' dipole
Reply With Quote
  #3  
Old 09-12-2017, 09:02 AM
bandersen's Avatar
bandersen bandersen is offline
Restoring Moto VT71s
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 7,214
It's a 1949 model 12X12 and well worth the price.

It has a 20Y1 chassis with a 12LP4 CRT. Seems to be less common than the earlier 10" version. Nice to have the metal back but the control door is missing and they are hard to find. Mine is missing too.

Here's what it would look like: https://www.pinterest.com/pin/457537643370097998/
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #4  
Old 09-12-2017, 02:50 PM
Sandy G's Avatar
Sandy G Sandy G is offline
Spiteful Old Cuss
 
Join Date: May 2003
Location: Rogersville, Tennessee
Posts: 9,039
NEVER have seen a working model of these.
__________________
Benevolent Despot
Reply With Quote
  #5  
Old 09-12-2017, 04:22 PM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 8,748
Quote:
Originally Posted by Sandy G View Post
NEVER have seen a working model of these.
I had one. CRT was almost dead so I had to turn the lights off to watch. Mine did have a good door though. Sold it to Dave (Dieseljeep) a few years back...I sorta miss that TV.
__________________
Tom C.

What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4

Reading between the scan lines since the mid 2000's.
Reply With Quote
Audiokarma
  #6  
Old 09-12-2017, 05:14 PM
jr_tech's Avatar
jr_tech jr_tech is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 3,518
Quote:
Originally Posted by Sandy G View Post
NEVER have seen a working model of these.
A few years ago, I did a slow variac power-up of mine, which still has most of its original parts, and it worked ok.



Gotta give it a full recap job, one of these years.

jr
Reply With Quote
  #7  
Old 09-13-2017, 12:06 AM
ZackN920's Avatar
ZackN920 ZackN920 is offline
VideoKarma Member
 
Join Date: Jul 2014
Location: Stephenson County, IL
Posts: 231
I saw that on CL too! I want it as well, but I'm not going to get it. Not interested in goin through Chicago for it. NOPE!


Shouldn't be hard to restore. I restored my 20X122 in exactly 1 week. Works great and has a great pic.
Reply With Quote
  #8  
Old 09-13-2017, 12:35 AM
Sandy G's Avatar
Sandy G Sandy G is offline
Spiteful Old Cuss
 
Join Date: May 2003
Location: Rogersville, Tennessee
Posts: 9,039
Wonder WHAT was the deal on the funny-shaped CRT ?!?
__________________
Benevolent Despot
Reply With Quote
  #9  
Old 09-13-2017, 05:51 PM
jr_tech's Avatar
jr_tech jr_tech is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 3,518
Quote:
Originally Posted by Sandy G View Post
Wonder WHAT was the deal on the funny-shaped CRT ?!?
It's actually a pretty good compromise between the "double D" mask and the "porthole" presentation. For a 12 inch round jug the vertical display size is increased by about 1/4 inch... not much, but I think that it makes for a more pleasing display. Compare to the 12" Philco next to it.



IMHO, pretty nice.

jr
Reply With Quote
  #10  
Old 09-13-2017, 09:49 PM
MadMan's Avatar
MadMan MadMan is offline
'A Disgusting Brony'
 
Join Date: Oct 2016
Location: Chicago
Posts: 260
Welp, I pulled the trigger.

I gotta say, the case is near immaculate. It has like a grand total of 2 small scratches that you can't even see at 5 feet away. The safety glass is plastic, and amazingly that's scratch-free, too. Inside there's a lot of dust, a mix of tubes, what looks like the original crt, no brightener, and all the pots and switches are free. It has the original metal back cover, and even the power cord, which is strangely still supple and intact. Oh, and it has this weird adjustable built-in antenna, and (I think) an adjustable electromagnetic focus ring? O_o

Sadly the crt tests near-dead.

I tried to bring the set alive on a variac and a wattmeter, but it was very quickly apparent that it wasn't having it. So here's the next question: do you think I could get away with just replacing the filter caps and making sure all the tubes are ok, in order to see if the crt will give me something? You know, before I go all the way and recap the whole thing?


Also, jr, I might have to hit you up for pictures of that front door thing, at some point in the future. :3
Reply With Quote
Audiokarma
  #11  
Old 09-13-2017, 10:27 PM
SpaceAge's Avatar
SpaceAge SpaceAge is offline
VideoKarma Member
 
Join Date: Jul 2016
Location: Colorado, USA
Posts: 158
Quote:
Originally Posted by MadMan View Post
Welp, I pulled the trigger.

I gotta say, the case is near immaculate. It has like a grand total of 2 small scratches that you can't even see at 5 feet away. The safety glass is plastic, and amazingly that's scratch-free, too. Inside there's a lot of dust, a mix of tubes, what looks like the original crt, no brightener, and all the pots and switches are free. It has the original metal back cover, and even the power cord, which is strangely still supple and intact. Oh, and it has this weird adjustable built-in antenna, and (I think) an adjustable electromagnetic focus ring? O_o

Sadly the crt tests near-dead.

I tried to bring the set alive on a variac and a wattmeter, but it was very quickly apparent that it wasn't having it. So here's the next question: do you think I could get away with just replacing the filter caps and making sure all the tubes are ok, in order to see if the crt will give me something? You know, before I go all the way and recap the whole thing?


Also, jr, I might have to hit you up for pictures of that front door thing, at some point in the future. :3
Very cool!! Let's see some pictures when you get the chance.

Ya might be able to 3D print that door. It is 2017 after all.
Reply With Quote
  #12  
Old 09-13-2017, 11:05 PM
mrjukebox160 mrjukebox160 is offline
VideoKarma Member
 
Join Date: Aug 2016
Posts: 39
How long did you leave the CRT on? It might wake up and if not it might rejuvenate.
Reply With Quote
  #13  
Old 09-13-2017, 11:17 PM
Phil Nelson's Avatar
Phil Nelson Phil Nelson is offline
VideoKarma Member
 
Join Date: Jan 2006
Posts: 3,869
Quote:
Originally Posted by MadMan View Post
(I think) an adjustable electromagnetic focus ring?
Sounds like an ion trap magnet, if it's an adjustable circular gizmo around the CRT neck. You can read about that and many other wonderful details in the Rider and Sams service manuals available at the ETF archive (scroll down to 20Y1):

http://www.earlytelevision.org/tv_sc...s_admiral.html

Quote:
Originally Posted by MadMan View Post
do you think I could get away with just replacing the filter caps and making sure all the tubes are ok, in order to see if the crt will give me something? You know, before I go all the way and recap the whole thing?
Sure, that's one approach. If your CRT is truly a dud, you still might not see anything, but at least you could measure key voltages and compare to the service manual values, and discover other things depending on what test equipment you have.

Also, as mrjukebox160 notes, some CRTs that look dead at first will "wake up" and show higher emission if you leave them on the tester for a while.

Phil Nelson
Phil's Old Radios
https://antiqueradio.org/index.html
Reply With Quote
  #14  
Old 09-14-2017, 12:37 AM
jr_tech's Avatar
jr_tech jr_tech is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 3,518
Some comments.

1. The focus coil can be tilted by moving a lever arm to position the trace... that is the odd arm sticking out of the back of the set.

2. You could try a power-up with the rectifier (5U4) removed, to see if the excessive power draw is caused by the filter caps...you should be able to light up all of the (good) tube heaters, without drawing excessive wattage.

3. Sure, I should be able to get halfway decent close-ups of the door with this iPad.

4. For sure, try an extended "wake up" of the jug.

jr
Reply With Quote
  #15  
Old 09-14-2017, 12:48 AM
jr_tech's Avatar
jr_tech jr_tech is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 3,518
oops! double post...sorry!
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 04:15 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
ęCopyright 2012 VideoKarma.org, All rights reserved.