I have 3(three) of the T-2 Leningrad and a few differnt russian roundies.
My experience is that the round CRTs, made in Easr Germany are mostly weak!
I am standing not alone with that!
You can easyly see on the speaker cloth the country of origin, East Germany
or Russia.
Do you need schematics for T-2 Leningrad?
I shouldn`t invest in another bad east-german made tube! The original 23 cm
CRT can easyly interchanged by a 22 cm Philips (MW 22 - __)
Source for that is good old England! PYE used them in the very familiar 1949/50
TV sets. The tubes are made by Philips and are mostly good.
See:
http://www.tvhistory.tv/1950-59-PYE.htm
If you do that, you insert a tetrode by a triode CRT!
If you want to use a ion trap tube you have to change the deflection yoke.
It is told (by czech repairmen), that russian picture tubes likes to implode, be careful.
The schematic and the gate in front of the tube is based on the german
E-1 pre-war TV set.
The russian horiz. line out tube is based (optical and technical) on a german
war time tube.
The radio inside was available as a table set, too.
Good luck!
TV-Collector
