It is an experimental tv monitor, probably made in the G.D.R. In this context: the East Germans had built an own roundie-crt, the B43G4C, a 70° roundscreen 17" tube. Only some prototypes were manufactored but were never installed into color tv sets. These remaining crts were used for homebrew color tv sets. The people get the schematics from Western Germany journals and they take b/w chassis and added the boards and circuits for color. A quartz for color subcarrier was hard to get. They used old quartzes from russion walkie-talkies and grind them until they reached the correct frequency values. It is absolutely incredible for us what was possible in the Eastern countries behind the iron curtain.
The entire story is written in a German forum:
http://www.razyboard.com/system/thre...8-3591332.html
Kind regards
Eckhard
09-07-2006, 06:07 AM
Hybrid Mode
