Quote:
Originally Posted by Electronic M
I also have seen first hand a power rectifiers tube in one of these sets fail and pop the CRT heater... I'm just glad it wasn't my set.
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Until you mentioned it, I had never heard of the rectifier tube in a TV fail in such a way as to open or otherwise damage the CRT filament, unless it was somehow possible for a defective rectifier tube to put entirely too much voltage on that filament. I would think if the LV rectifier tube were defective in any way, the worst that could possibly happen would be the set's line fuse or the house fuse would blow. The LV supply in these Pilot TVs must have been built much differently from that in most sets of that time.
I don't know what type CRT was used in the Pilot TVs (I've never seen or owned one), but I am thinking the CRTs in those sets is very rare, with replacements almost impossible to find except from a junker. The 3KP4 CRT seems to fit that category. Until I read your post, I personally had never heard of such a CRT being used in commercially-available televisions. Your set must have been made in the days when television was very new, which would have been in the late 1940s.