Re: 25" LOW res CRT on Star Wars

The only time I saw the patching like that is using a 6100 (100 degree deflection) yoke on a 90 degree amplifone crt. I tried to run an amp crt in a 6100 chassis. I could not even get past the purity.. got it fairly close but never passable for my taste.
Well maybe your angles are off between yoke and crt then. The 6100 as I mentioned is standard res, 100 degree, but I also had a factory standard res, 90 degree crt in an amp setup so standard res came in both angles obviously. The bells of the crts are noticeably different side by side.. you should be able to tell if they are different by comparing.. also I remember when I tried to get the 6100 yoke on the amp crt it was obviously a wrong fit compared to how snug other yokes fit where it goes to the bell. When I tired that amp in the 6100 chassis, I also tried to converge for the heck of it and couldn't even get half decently close. Someone said a short while back they got it to work but I didn't have any luck. The misconvergence I talked about similar to yours was enough to bug me, but its not something I wouldn't use if I got tired of mucking with it sort of thing.

--- On Sat, 7/17/10, Andre Huijts <a.huijts@upcmail.nl> wrote:

> From: Andre Huijts <a.huijts@upcmail.nl>
> Subject: Re: VECTOR: 25" LOW res CRT on Star Wars
> To: vectorlist@vectorlist.org
> Received: Saturday, July 17, 2010, 6:08 PM
> I do have a spare yoke around, but
> the owner (CKONG) took the monitor with him. I might try it
> when he will put the game in his still to build gameroom
> next november or so...
>
> I dd loosen the yoke completely. What also baffled me was
> that when setting the blue raster there was not a single
> position where I could get an overall blue raster. Some
> corners (mostly on the left top and bottom) were either
> completely dark or went to green but I couldn't get it
> right.
>
> I did numerous degaussings to make sure that wasn't the
> cause.
>
> Could it be that the deflection currents in the yoke were
> simply not high enough by some cause on the deflection board
> ? Stupid, but I forgot to try my own deflection board.....
>
> I do realize that resolution has nothing to do with it, but
> could f.i. the gun placement be different from a mid-res
> tube ? I doubt it but maybe ?
>
> Thanks, Andre
>
>
>
>
> Op 17 jul 2010, om 17:14 heeft andre het volgende
> geschreven:
>
> > I have had this on proper 19" amp crt's with the
> proper yoke. I also had this on a raster lately.. G07 I
> believe. Can't offer you much advice other than to take it
> all off, and start over.. I seem to almost always get a
> different result swapping rings, or at least re-doing the
> yoke from purity on..and many times for the slightly better.
> If you have a second yoke, maybe try that. Take some
> impedence readings to see if they vary because I would
> really like to know the cause as well.. its pretty
> irritating/exasperating.
> > Doubt your tubes are different angles.. and I also
> have a Gravitar that came with a factory amplifone setup,
> but had a standard res crt in it. Resolution doesn't make a
> dif.
> >
> > --- On Sat, 7/17/10, Andre Huijts <a.huijts@upcmail.nl>
> wrote:
> >
> >> From: Andre Huijts <a.huijts@upcmail.nl>
> >> Subject: VECTOR: 25" LOW res CRT on Star Wars
> >> To: vectorlist@vectorlist.org
> >> Received: Saturday, July 17, 2010, 9:36 AM
> >> This is now the 2nd machine I'm
> >> working on that has a LOW res tube instead of a
> med-res that
> >> is supposed to be in there.
> >>
> >> The FIRST machine I worked on has a WG6100
> chassis.
> >>
> >> The SECOND has an Amplifone chassis, but as
> mentioned BOTH
> >> have low res CRTs.
> >>
> >> Now, whatever I try, I cannot get these things to
> converge
> >> at least a BIT nicely.
> >>
> >> Using the test-raster screen ,the main issue is
> that blue
> >> is UNDER the horizontal white lines on the top,
> but is ABOVE
> >> the horizontal white lines on the bottom. 
> Whatever I
> >> try, I cannot solve this because if I make it
> correct on the
> >> top part of the screen, it will become worse on
> the bottom
> >> part and vice versa.
> >>
> >> Now, my theory is that the yoke is probably not
> set-up for
> >> a 25" low-res tube that may have a different angle
> than the
> >> mid-res tube. Could that be the cause ?
> >>
> >> Or could it be that we are using a wrong or to
> weak
> >> convergence ring-set ?
> >>
> >> Regretfully the typenr. of the used CRT is
> torn-off so I
> >> can't see if it's 90 or 100 degrees.
> >>
> >> André
> >>
> >>
> >>
> >>
> >>
> >>
> >>
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> >> chris@westnet.com
> >>
> >
> >
> >
> >
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>
> André Huijts
> andre.huijts@upcmail.nl
>
>
>
>
>
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>

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Received on Sat Jul 17 18:47:42 2010