Re: Gravitar/Amplifone issue

Swapped in 6012's off a board that was fluctuating and
no dif...so all TL082's replaced as well as those 2
chips.
On a board that does fluctuate the X and Y out is
between .1 and .3 volts swinging. On the Gravitar it
is 11 volts on Y and around 2 volts (and decending) on
the X.

--- andre <livnfree_can@yahoo.com> wrote:

> Thanks guys!
> I'll get some 6012's and try them out.
>
> Mark, thanks for the offer and I really appreciate
> it,
> but I will try these, then decide. I think shipping
> to
> you there and back plus finding out who knows what
> is
> wrong puts me in the ballpark of just buying a
> tested/working board. I'm into these games big time
> already and have not got a single out of the 6
> working
> yet. Asteroids deluxe only one close and I believe
> its
> just a HV diode.. If you can test a bunch of these I
> would perhaps be willing to pay. But with your 9000,
> can you tell if say..I dunno... a 74ls157n is not
> functioning somewhere?...like something totally
> minor.
>
> Anyways... on the dern monitor... don't amplifones
> have spot killers as well? I'm wondering why when I
> turn this thing on hooked up with either of the
> three
> boards I get the bright spot in the center... For
> starters, shouldn't no signal give nothing on the
> monitor? Shouldn't a bad, or no signal trip a spot
> killer?
>
>
> --- Mark Hooks <markhooks@earthlink.net> wrote:
>
> > The TL082CPs are the most common failure I have
> seen
> > followed by the
> > AM6012s. Occasionally one of the output voltage
> > regulators will die too such
> > as the 7915Csor the 7815s. You can check the
> > voltages at the + and - 15 volt
> > test points.
> >
> > By the way, I found my Gravitar adapter for the
> PAT
> > 9000. If you want me to
> > hook your board up and see what I can find wrong
> > just let me know.
> >
> > Mark.
> > ----- Original Message -----
> > From: "andre" <livnfree_can@yahoo.com>
> > To: <vectorlist@vectorlist.org>
> > Sent: Wednesday, March 28, 2007 2:09 PM
> > Subject: Re: VECTOR: Gravitar/Amplifone issue
> >
> >
> > > Followup:
> > >
> > > I went through almost every part of the
> amplifone
> > this
> > > morning and from what I can tell, everything is
> > > working as it should.
> > >
> > > So I went back to the Gravitar board... now I
> must
> > > have been thinking about the 2 Space Duels with
> > X/Y
> > > fluctuating because on this board neither does.
> > The X
> > > stays at a consistent voltage, while the Y
> slowly
> > > climbs...I did not let it go to see how high it
> > would
> > > go but it doesn't seem to slow down, fluctuate,
> or
> > > reverse direction. I replaced all 4 op-amps with
> > no
> > > change. All electrolytic caps are changed on the
> > > board. I swapped in a new 6502 processor which
> did
> > > nothing as well.
> > >
> > >
> > >
> > >
> >
>
____________________________________________________________________________________
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> >
>
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> > problems to
> > > chris@westnet.com
> >
> >
>
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> >
>
>
>
>
>
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____________________________________________________________________________________
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Received on Wed Mar 28 20:24:53 2007