07-04-2024, 11:17 PM
Despite the passage of time, the issues of image conversion 625-405 are, as I have found out, still relevant and arouse some emotions. I discovered that there are people on this forum who have posted on this topic for a long time. I wonder how many people today treat these matters theoretically and how many practically. I'm getting to the question of whether it is possible to estimate, e.g. based on the sold Aurora and Hedghogs converters, how many hobbyists currently watch old TVs of the 405-line system? Do such numbers circulate in public space?
The process of rebuilding cathode ray tubes is difficult to recreate today. It requires a lot of experience and a stock of new electron guns. Today, new technology comes to the rescue. For example, old vacuum pump systems and CRT heating to several hundred degrees can be replaced with modern turbomolecular or ion pumps. They allow you to achieve a vacuum even two orders higher. Joining glass by melting can also be replaced by other technologies. It is worth noting that such innovative actions were already used during the production of metal picture tubes. Metal and glass were joined using physico-chemical reactions. I have collected a large amount of old type Russian color picture tubes from the turn of the 1960s and 1970s and new electron guns. I have two types of pumps at my disposal that I wrote about. All that remains is to find time for tests. Unfortunately, I only have one 15GP22. I will certainly do the first tests with b/w CRTs.
Adam
The process of rebuilding cathode ray tubes is difficult to recreate today. It requires a lot of experience and a stock of new electron guns. Today, new technology comes to the rescue. For example, old vacuum pump systems and CRT heating to several hundred degrees can be replaced with modern turbomolecular or ion pumps. They allow you to achieve a vacuum even two orders higher. Joining glass by melting can also be replaced by other technologies. It is worth noting that such innovative actions were already used during the production of metal picture tubes. Metal and glass were joined using physico-chemical reactions. I have collected a large amount of old type Russian color picture tubes from the turn of the 1960s and 1970s and new electron guns. I have two types of pumps at my disposal that I wrote about. All that remains is to find time for tests. Unfortunately, I only have one 15GP22. I will certainly do the first tests with b/w CRTs.
Adam