In message <3B6BBB61.70F0@ezy.net.au>, Roman Black <fastvid@EZY.NET.AU>
writes
>Hi Nigel, I have quite a few thyristors here,
>I think they were used in the vertical stage
>of the old Sony Trinitrons TVs?? Its been over
>10 years since I last remember needing one for
>for something, but I can't remember what. :o)

At one time Sony used some special devices called Silicon Gate Switches,
they were like a thyristor but could be switched off as well as on. They
were used as line output and chopper in the KV1810, and as line output
only in the KV1820. I seem to recall they may have been used as frame
output, and even pincushion in some of the larger Sony TV's around the
same time.

The most common type was the SG613, they were stupidly expensive, and
caused a great many KV1810's to be scrapped!.
--

Nigel.

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