7jp4 DIY Television

[bhegges]

As a kid I always thought it would be fun to build a TV. Once I grew up I went to school for Electronic Engineering, only to become an IT guy. Fast forward to today and I have finally put childhood ideas to work. I wanted to build a TV (it is really just a monitor) and something with octal tubes would make it even cooler.

The design comes from an Admiral 19A11. I substituted the 6au6 video amp with an octal 6sh7. Other changes include wiring in a retrace circuit. All of the tubes including the picture tube have 6.3 volt heaters which are wired in parallel. The power supply transformer was custom made by Sowter which supplies the 6.3 volt and 5 volt heaters along with the 250-0-250 volt main supply. I fabricated the aluminum plate and wood chassis myself. All of the wiring is point to point. If I was going to do it again I would have bolted in a few terminal strips to solder to. I found a NOS 7jp4 tube which provides a very nice picture which is nice and bright with or without lights on. I am pleased with the results, I would like to think this would have been the coolest diy project sometime back in the late 40s, probaly still cool today. Last thanks for all of the knowledge this forum provides, I have read and learned from the many threads.

Schematic