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Originally Posted by Kaye-Halbert TV
And another WOW; a BROWN BASE 21FBP22??? In USA tubes, a brown base usually means an industrial version of the tube. Wonder if this is an industrial CRT?
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This might be correct. The K4 made for export to Canada. It is an NTSC receiver. Later the K4 was upgrated with a PAL unit. In Europe this set was used for experiments. It was never sold in the shops.
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Originally Posted by Sandy G
Looks like they lined the inside of the cabinet w/aluminum to keep X-ray emissions down...or keep interference down too...Again, Wow....
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Marcel himself lined the inside of the cabinet w/aluminium. The K4 does not have a shunt regulator.
Schematics:
http://bs.cyty.com/menschen/e-etzold...schematics.TIF
Eckhard