In article ,
Graham. writes

Line Output Transformer
LOPTX (pron. Loptex)
LOPTY
Line Tranny
But please, not flyback.
Flyback transformer if you must, but not flyback. Not unless you are a merkin

Strictly speaking, LOPTs and flybacks are two different things.

LOPTs refer to an older design where the line output stage was boosted
to about 9kV by a conventional wound transformer, and again to about
28kV by a device called a tripler to produce the final anode voltage.

There's a pic of this arrangement he

http://tinyurl.com/42sm8tg
http://tinyurl.com/3e3schw

in the first image, the green box-shaped object is the tripler, in the
second, it's blue.

In both cases, the line output transformer is the wound device next to
the tripler.

Flybacks refer to an all-in-one unit which eliminates the separate
first-stage transformer, such as this:

http://electronicrepairguide.com/fly...ansformer.html

--
(\__/)
(='.'=)
(")_(")