Re: sensible Asteroids question!

Yes.. perusing the Asteroid schematics I have, it seems easiest to provide
the 36VAC.. yes, it's center tapped 18/18 with the center tap grounded. This
is converted on-board to DC +5,+8.2,+12,+15,-8.2 and -15 as well as +22VDC
unregulated, tho the last is just for the audio amps. Then you need a
seperate +5VDC regulated supply which is what the AR board usually provides.
I have no idea why Atari did it this way.

Happy Holidays,

Don
LoneWolf Systems

----- Original Message -----
From: "Martin White" <martin@guddler.co.uk>
To: <vectorlist@synthcom.com>
Sent: Sunday, December 15, 2002 11:21 AM
Subject: VECTOR: Maybe stupid Asteroids question!

> Hi guys,
>
> First post in a very long time!...
>
> Anyway, i have an Asteroids board and two Ast. Deluxe boards here that
> i've just got as non working. My cabinet (an Asteroids mini) is
> currently on it's hol's in a foreign country having it's woodwork
> lovingly restored, so i need to make up some kind of rig for getting
> these going.
>
> Picture is no problem as i can use my scope, but i am unsure of what i
> need to do about the 36v AC...
>
> Is this really needed? If so, how do people provide this? I'd rather not
> start getting hold of spare power bricks and AR boards just for this
> purpose as my test bench is full enough already!
>
> Is it 18v Center Tap with each side going to one pin on the edge
connector?
>
> My rig (http://www.guddler.co.uk/taitorig.php) has the usual +5, -5, +12
> DC, but it also has -12, 26, 20, 15, 14v (DC) and 10.6v AC (21.2v CT?)
> would any of these help rig it up?
>
> If no to all the above, i am told that i can get a toroidal PS from
> www.maplin.co.uk - anyone recommend a stock number and how it should be
> connected up?
>
> Thanks for any info,
>
> Martin.
> --
> Guddler's Arcade
> http://www.guddler.com
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Received on Sun Dec 15 12:28:12 2002