Very bad idea running the heaters at reduced voltage, it results in cathode poisoning and reduced CRT life, Hitachi soon realised this with its Earley instavision range and issued a modification kit when the CRT was to be replaced.
11:45 - they were introduced here in the summer of 1971. Television magazine announced their impending arrival in either the May or June edition. The Hitachi CSP680 just beat it by about a month. I have a 680 service manual dated April 1971.
The set was introduced in Japan in late 1968,N America in 1969 and UK in 1970/71.The 1330ub had a real Pal decoder in it but left the hue control strangely.I have both a 1320 and 1330 and the colour variation with the 1330 control is much less than the earlier model.
what a find they do command a lot of money these days with a good lamp in them but as you say they were so reliable i remember as an apprentice seeing just a hand full and all with terrible soft tubes , from memory the next model on that was in a whit plastic case went the same way they just ran and ran until the lamp went soft and the super white cabinet went yellow like a 1970's pub ceiling
My father owned the local TV shop so we were lucky eniugh to have a MK1 from brand new with its dish aerial that did not work where we lived i thought it was 1969 as we were still selling philips G6s the MK 2 with the SMPS was not as relgable .and yes shame about the tube life .
