Re[3]: More transformer data.

-----Original Message-----
From: John Robertson <jrr@flippers.com>
To: vectorlist@synthcom.com, vectorlist@synthcom.com
Date: Wed, 29 Nov 2000 09:01:45 +1100
Subject: Re[2]: VECTOR: More transformer data.

> If you have a transformer that is listed as (for example) 36-0-36, then you
> HAVE an isolation transformer. Unless the transformer specifically
> identifies itself as an "Auto-Transformer" then it is an isolation style.
>
> Look at the wiring diagram for the transformer in question. As long as the
> output windings are not connected to the input it is isolation (most
> transformers are isolation by the way). You can also do a resistance check
> if you don't have the wiring for the transformer. If there is infinite
> resistance between the line in and the output windings then this is an
> isolated transformer. If the resistance is around 20 ohms, then you have an
> auto-transformer.
>
> The reason the discussion of isolation transformers comes up is that
> standard raster (sorry) video games' monitors are NOT line-isolated, having
> no transformer in the primary. They assume that the application provides
> isolated power to the monitor.
>
> Clear as mud??
>
> John :-#)#
>
That sounds pretty fucked-up!
I am in europe, and we ALLWAYS use isolation transformers on the monitors.
If we didn't then we could get prosecuted for endangering public safety.

I was not aware that in america people where stupid enough to just connect monitors to the power-line.
I suppose that is why american manuals make so much of a point about correct grounding of the machine!

L8r.

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Received on Thu Nov 30 15:21:20 2000