Re: Pictures of your Star Wars

From: John Robertson <jrr_at_flippers.com>
Date: Fri Feb 21 2003 - 01:44:37 EST

The ground point on the Ampliphone is the same tie point as the aquadag
common wire from the picture tube.

John :-#)#

At 08:39 PM 20/02/2003 -0500, Joel Rosenzweig wrote:

>Anyone? Bueler? Bueler? Really, where does the ground wire go on an
>Amplifone, since it has no chassis?
>
>Joel-
>
>
>----- Original Message -----
>From: "Joel Rosenzweig" <joel.rosenzweig@verizon.net>
>To: <vectorlist@synthcom.com>
>Sent: Wednesday, February 19, 2003 9:03 PM
>Subject: Re: VECTOR: Pictures of your Star Wars
>
>
> > > BUT..
> > >
> > > did you add a jump cable between the game pcb GND and the monitor frame?
> > > this is the most crucial for display distortions, not between game pcb
>and
> > > power brick..
> > >
> > > Andy Welburn
> > > www.andys-arcade.com
> > >
> >
> > Could you clarify for me? Given that the Amplifone doesn't have a monitor
> > frame, where exactly would I clamp this ground wire?
> >
> > Thanks,
> > Joel-
> >
> >
> >
> > ----- Original Message -----
> > From: "Andy Welburn" <andy@andys-arcade.com>
> > To: <vectorlist@synthcom.com>
> > Sent: Wednesday, February 19, 2003 12:24 PM
> > Subject: Re: VECTOR: Pictures of your Star Wars
> >
> >
> > > > Some have suggested adding a ground wire between the power supply and
> > the
> > > > game PCB. I checked with a meter and found that it registered less
>than
> > 1
> > > > ohm between earth ground on the transformer assembly and the ground
>test
> > > > point on the vector generator board. I added a jumper wire between
>the
> > > two
> > > > just to test, but it appears to have made no difference in quality. I
> > did
> > > > this years ago on my Tempest when it had a similar problem, and this
>is
> > > > exactly what did the trick. Those vectors looks quite sharp!
> > > >
> > > > Joel-
> > >
> > > BUT..
> > >
> > > did you add a jump cable between the game pcb GND and the monitor frame?
> > > this is the most crucial for display distortions, not between game pcb
>and
> > > power brick..
> > >
> > > Andy Welburn
> > > www.andys-arcade.com
> > >
> > >
> >
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Received on Thu Feb 20 22:44:52 2003

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