Welcome to Australia's only Vintage Radio and Television discussion forums. You are not logged in. Please log in below, apply for an account or retrieve your password.
Australian Vintage Radio Forums
  Home  ·  About Us  ·  Discussion Forums  ·  Glossary  ·  Outside Links  ·  Policies  ·  Services Directory  ·  Safety Warnings  ·  Tutorials

Vintage Television

Forum home - Go back to Vintage Television

 Ekco TX-275 Portable TV Infomation
« Back · 1 · Next »
 Return to top of page · Post #: 1 · Written at 1:11:08 PM on 25 November 2016.
Roryk's avatar
 Location: Melbourne, VIC
 Member since 9 February 2013
 Member #: 1290
 Postcount: 9

Hello,

I'm after a circuit schematic and valve layout for an Ekco TX-275 Portable TV.

I've also link to a couple of pictures here.

http://i.imgur.com/dlbZACt.jpg
http://i.imgur.com/WFJcFfT.jpg

Any help would be greatly appreciated.


 
 Return to top of page · Post #: 2 · Written at 4:42:35 PM on 25 November 2016.
Ian Robertson's avatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 624

I have one of these! I even have the users manual and the DC power cable!

I've check at home over the weekend to see if I have a copy of the schematic.

Yours looks to be in good condition. Has it been re-capped?
Someone tried to fix a vertical fault in mine before I got it, they replaced just about everything except the leaky paper cap that was causing the problem.


 
 Return to top of page · Post #: 3 · Written at 4:55:18 PM on 25 November 2016.
Roryk's avatar
 Location: Melbourne, VIC
 Member since 9 February 2013
 Member #: 1290
 Postcount: 9

Hi, thanks for that hope to hear from you.

The TV's had some of the capacitors replaced, but it needs some work.

Regards, Rory.


 
 Return to top of page · Post #: 4 · Written at 12:44:43 PM on 26 November 2016.
Ian Robertson's avatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 624

Hi Rory.

Found it.

I've asked Brad to make the schematics available here, although if you unhide your email address I could send it to you direct.

Very, very interesting little TV, this one. Its Mazda CRT was a pre-war design, mag focus non-aluminised screen with no ion trap so the centre of screen will darken over time. Why use such an obsolete CRT? There were no other suitable CRTs available and this CRT was easy to drive with a low (8kV) final anode voltage which held the power consumption down..

The idea of a vibrator power supply in a TV was certainly novel. In the UK they were fitted to Bentleys - very avant garde to have a TV in your car in the mid 50s.

The model we have is the export (CCIR) version.

Ian

Ekco TX275 Television Circuit Diagram


 
 Return to top of page · Post #: 5 · Written at 5:48:47 AM on 27 November 2016.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 4398

File uploaded to Post 4.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
Brad.

A valve a day keeps the transistor away...

 
« Back · 1 · Next »
 You need to be a member to post comments on this forum.

Sign In

Username:
Password:
 Keep me logged in.
Do not tick box on a computer with public access.