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.

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.

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.

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

File uploaded to Post 4.