Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Diagnostic & Test Equipment

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 09-15-2015, 11:07 AM
Kamakiri's Avatar
Kamakiri Kamakiri is offline
Administrator
 
Join Date: Jun 2002
Location: Buffalo, New York
Posts: 5,109
5ADP31 scope tube?

Picked this tube up in a lot of stuff I got over the summer. I can find nothing about it. Base is the same as a 7" electrostat.

I wonder, can it be used for anything? I can't even find a basing diagram for this number.
Attached Images
File Type: jpg 100_6395.jpg (80.8 KB, 23 views)
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia."
Reply With Quote
  #2  
Old 09-15-2015, 11:28 AM
jr_tech's Avatar
jr_tech jr_tech is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 4,510
Try this:
www.radiomuseum.org/tubes/tube_5adp7.html
P-31 is a medium persistence pale green phosphor, used in a lot of 'scope tubes, but the basing should be the same as the P-7 tube shown.

jr
Reply With Quote
  #3  
Old 09-15-2015, 06:46 PM
N2IXK's Avatar
N2IXK N2IXK is offline
Technohippie
 
Join Date: Apr 2011
Location: Sittin' on the "Group W" bench...
Posts: 799
IIRC the 5ADP- is a flat-faced version of the old 5CP- series.

Could make a nice CRT clock, or a spare for 60s/70s low end scopes, engine analyzers, etc..
Reply With Quote
  #4  
Old 09-15-2015, 07:28 PM
Kamakiri's Avatar
Kamakiri Kamakiri is offline
Administrator
 
Join Date: Jun 2002
Location: Buffalo, New York
Posts: 5,109
....assuming I was talented enough to do so
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia."
Reply With Quote
  #5  
Old 09-15-2015, 08:34 PM
N2IXK's Avatar
N2IXK N2IXK is offline
Technohippie
 
Join Date: Apr 2011
Location: Sittin' on the "Group W" bench...
Posts: 799
Quote:
Originally Posted by Kamakiri View Post
....assuming I was talented enough to do so

There are several kits available if you aren't up to rolling your own...

http://oscilloscopeclocknixiecrt.com/Kit.htm
Reply With Quote
Audiokarma
  #6  
Old 09-16-2015, 10:19 AM
Jon A.'s Avatar
Jon A. Jon A. is offline
Don't mess with Esther.
 
Join Date: Jun 2013
Location: Canada
Posts: 4,267
I'd probably mouse one into a 7" electrostat just for fun. I've had a few green phosphor composite monitors, and an entirely green picture makes for some interesting watching.
Reply With Quote
  #7  
Old 09-16-2015, 12:35 PM
jr_tech's Avatar
jr_tech jr_tech is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 4,510
That shouldn't be too difficult... the tube base appears to be pin for pin compatible with a 7JP4, but one must connect the "post" connection to a positive voltage. For a "quick & dirty" it could be grounded or tied to the set's "B+", but would be brighter if a small 1-2kv module were added to the chassis. Focus and brightness controls would likely have enough range to work ok. The major difference would be the CRT deflection sensitivity which is about 3-4 times more sensitive than a 7JP4, so serious "over-scan" would occur if it was plugged into an unmodified 7JP4 set... a simple voltage divider could be added to the set's horizontal and vertical deflection circuits to remedy this.
P-31 is a pale blue-greenish-whitish color, which is suspect would be fairly watch-able, even though it may have somewhat longer persistence than P-4.
Could be the basis for *another* interesting "pre-war" replica-set.

jr
Reply With Quote
  #8  
Old 09-16-2015, 06:52 PM
Kamakiri's Avatar
Kamakiri Kamakiri is offline
Administrator
 
Join Date: Jun 2002
Location: Buffalo, New York
Posts: 5,109
One weird project at a time . Anyone want/need the tube for the cost of shipping?
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia."
Reply With Quote
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 12:48 PM.



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