Re: 8032 crt vs. 3032 crt

One of my 3032s has a 80 column addon card, which in fact is a rebuilt 
8032 video circuit.
It works fine with the 9'' crt.
I never tried a 8032 mainboard though.
Maybe the signals have to be inverted.
For the sync signals, there are inverters installed on the 8032 
mainboard that can be activated/deactived with jumpers.

Christian

Am 13.06.2013 22:14, schrieb Ruud@Baltissen.org:
> Hallo Giovi,
>
>
> > In a nutshell the question is: can I use an 8032 board with the
> > 3032 9" CRT ?
>
> I work with both machines but never mixed their CRTs, so I don't know. 
> But it is an interesting question. So I CCed the whole message to an 
> email list with real CBM hackers. May be one of them can give an answer.
>
> But it doesn't mean I'm completely without an answer. You already 
> mentioned the idea I used when building C64 inside a brooken PET 2001 
> in 1989: I replaced the circuit of the original CRT with the one of a 
> Philips video monitor. Had to adjust some resistors IIRC because of 
> the smaller tube but it worked!
>
> >
> > Hi Ruud,
> > I'm Giovanni "Giovi" Verrua and I'm a 44 y.o. italian programmer .I
> > actually live in Brazil with my
> > family.
> > I found your site and I saw you're quite involved with C= hacking.
> > I'm writing you because I'm looking for an answer!
> > In a nutshell the question is: can I use an 8032 board with the 3032 9"
> > CRT ?
> > Of course I can't do it straightly (the 9" appears to be messy), but what
> > about keeping the 9" crt
> > and swap its driver board with the 12" driver board?
> > If you find a minute to read, you can find the extended version of the
> > question below :-) - (It is the
> > text I posted on a forum).
> > have you any idea?
> > thank you for your time!
> > cheers,
> > Giovi
> >     I have a spare, working 8032sk without keyboad and a faulty 3032
> >     I'm one step away to fix it use gasoline and a match, since I'm
> >     trying to fix its garbage screen problem since 2001 (yes, I mean
> >     12 years!) with no luck...
> >
> >     I was trying to find a way to use the 8032 working board inside
> >     the 3032 case. Yes, I'm trying to make the first 3032 at 80 colums
> >
> >
> >     As first test, I tried to connect the 8032 board to the 3032 9"
> >     monitor. The image appears but it's quite messy (like when you
> >     drive a CRT above its max resolution: green background instead of
> >     black, text shifted, some horz. bright lines, etc...). I imagine
> >     (but of course I'm not sure!) the problem could be the 9" crt
> >     driver board. I'm assuming (better: I'm hoping!) the crt itself
> >     can support the 8032 resolution and the problem is just the 9" crt
> >     driver board...
> >
> >     So here's the question:
> >
> >     CAN I USE THE 8032 CRT DRIVER BOARD (the one inside the monitor,
> >     directly connected to the 8032 crt) ON THE 3032 9" CRT?
> >     I was thinking to extract the board from the 12" CRT and use it to
> >     replace the one inside the 9" CRT.
> >
> >     - Will it blow, or will it work?
> >
> >     - Will it drive the 9" CRT at the 80 columns resolution of the
> >     8032 board?
> >
> >     - Should I use the original crt transformer or whatever it is (I
> >     mean the one attached on the side of the crt with a "sucker"
> >     connector)
> >     OR
> >     Should I simply extract the "sucker" connector from the 9" crt and
> >     connect the one originally attached to the 8032 12" crt?
>
>
> --
> Kind regards / Met vriendelijke groet, Ruud Baltissen
> www.Baltissen.org
>
>
>
>
>
> Message was sent through the cbm-hackers mailing list 


-- 
Christian Dirks
Toast_r@Idealine.info




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