Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Vintage TV & Radio Tech Forum

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 01-28-2017, 04:52 PM
ieure ieure is offline
VideoKarma Member
 
Join Date: Dec 2016
Posts: 16
Tube size question

My understanding is that the WTDS indicates the visible size in centimeters. However, the Wells-Gardner D9205 monitor is described as being "33 inches," but has an A80AEJ15X08 tube in it, which is 31.49". 6That's quite a bit less than I'd expect would get rounded up to 33".

Is there something I'm missing here? Perhaps the size is measured laying directly across the screen, which would add an inch or so due to the curve of the face.
Reply With Quote
  #2  
Old 01-28-2017, 05:22 PM
Findm-Keepm's Avatar
Findm-Keepm Findm-Keepm is offline
Followin' the Rules...
 
Join Date: Jun 2007
Posts: 2,832
Quote:
Originally Posted by ieure View Post
My understanding is that the WTDS indicates the visible size in centimeters. However, the Wells-Gardner D9205 monitor is described as being "33 inches," but has an A80AEJ15X08 tube in it, which is 31.49". 6That's quite a bit less than I'd expect would get rounded up to 33".

Is there something I'm missing here? Perhaps the size is measured laying directly across the screen, which would add an inch or so due to the curve of the face.
Where are you? US, Canada or Europe? All have their own conventions for viewable area. Some even require the square viewable area to be stated.

US - it's the diagonal viewable area, as defined by US Code from 1967, first used in 1968 model adverts.

Canada/Europe - I honestly don't know.

A80 CRTs in the US are 32", A63 is 25", and A91 is 36". Rounding is allowed.
__________________
Brian
USN RET (Avionics / Cal)
CET- Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"

When fuses go to work, they quit!
Reply With Quote
  #3  
Old 01-28-2017, 07:51 PM
ieure ieure is offline
VideoKarma Member
 
Join Date: Dec 2016
Posts: 16
Quote:
Originally Posted by Findm-Keepm View Post
Where are you? US, Canada or Europe? All have their own conventions for viewable area. Some even require the square viewable area to be stated.

US - it's the diagonal viewable area, as defined by US Code from 1967, first used in 1968 model adverts.

Canada/Europe - I honestly don't know.

A80 CRTs in the US are 32", A63 is 25", and A91 is 36". Rounding is allowed.
I'm in the US, so was Wells. I'm aware of the differences by country, but most of the specs I've seen for things using WTDS tubes have roughly followed what you stated. The 33" is the first exception I've found, so I was just curious why that was.
Reply With Quote
  #4  
Old 01-28-2017, 07:58 PM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 14,762
Maybe what you have is a post-sale-to-consumer Canadian import...The canucks never passed the screen size laws we did so their tubes are usually labeled as ~2" bigger than the same tube was here in the USA.
__________________
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
  #5  
Old 01-29-2017, 09:52 PM
old_tv_nut's Avatar
old_tv_nut old_tv_nut is offline
See yourself on Color TV!
 
Join Date: Jul 2004
Location: Rancho Sahuarita
Posts: 7,184
I am not sure if monitor tube sizes in the US were required to be stated as viewable diagonal rather than over-all diagonal at the same time as TV tubes. Anyone recall?
__________________
www.bretl.com
Old TV literature, New York World's Fair, and other miscellany
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 07:08 AM.



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