04-04-2017, 08:21 PM
I do remember in 1967 just a few months before the introduction of colour the picture quality of the 625 line picture dramatically improved. From the previous milky looking pictures we were watching on BBC2 the picture quality became absolutely superb only to deteriorate very slightly when colour was introduced.
Never had any complaints from customers about the quality of the 405 line pictures.
I have a 1960 Pye 405 line TV which has a particularly good 23" CRT. The lines really are noticeable on the American 23SP4 CRT. Some sort of spot wobble would be a good idea. In 1963 KB introduced a line eliminator circuit which elongated the spot in the vertical direction. An adjustable negative voltage was supplied to the focus electrode of the CRT. Might try this circuit in the Pye sometime.
Geordie McBoyne.
Never had any complaints from customers about the quality of the 405 line pictures.
I have a 1960 Pye 405 line TV which has a particularly good 23" CRT. The lines really are noticeable on the American 23SP4 CRT. Some sort of spot wobble would be a good idea. In 1963 KB introduced a line eliminator circuit which elongated the spot in the vertical direction. An adjustable negative voltage was supplied to the focus electrode of the CRT. Might try this circuit in the Pye sometime.
Geordie McBoyne.
