Colour TVs used to have CRT (cathode ray tube) indicators, with three electron guns arranged in a triangular formation referred to as a delta gun.
The odd-coloured gun in aNordmende 1960s TV set’s delta gun is shown being reconditioned in a new video.
CRT reconditioning is complex and requires specialist equipment and experience, such as cutting the tube neck and bonding a new neck extension.
One commentator observes that fully reconditioned CRTs never lasted as long as new ones and questions whether it is a worthwhile project given the complexity and the availability of new gun assemblies.
However, for those who prefer CRTs, this may be the best option for extending their use.
It is probable that this repair has decreased in volume due to the decreasing demand for CRT TVs, but since these devices were widely produced and used throughout the 20th century, individual repairs are still plausible.
Thus, it is likely to be more of a niche hobby rather than a widespread practical solution for maintaining ageing equipment.
