Hi, I just started a dream project: Building an oscilloscope from scratch. Originally I wanted to use a russian 13LO37I but it turend out to be too bulky so I went and scored a waaay smaller 3KP1 / DG 7-113 from ebay.
I’ll put up a high res Photo of the tubes weiring system at my website.
One of the first portable TV-sets: http://www.radiomuseum.org/r/pilot_candid_tv_tv37.html
The DG 7-113 / 3KP1’s wiring system:
The russians 13LO37I / 13ЛО4И:
I found the first plans at Jogis Röhrenbude: http://www.jogis-roehrenbude.de/Bastelschule/Miniszill/Miniszill.htm