Hi Chris,
A vertical output stage is like/about an audio output stage constructed.
(higher voltage/low current at the primary, lower voltage/high current
at the secondary)
As others said, there is not a big difference among output transformers.
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I should try to use a transformer from a parts set with the same angle
in the vertical deflection.
It is not so complicated like interchanging transformers in the horizontal
output.
Good luck!
TV-collector
