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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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26th Mar 2019, 6:20 pm | #41 | |
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Re: PIL - Colour fringing
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26th Mar 2019, 6:37 pm | #42 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: PIL - Colour fringing
You'll have a job adjusting the yoke or it's rings with one hand, generally a two hands job with power on, static convergence and blue lateral can be done with one hand with a delta tube, but purity is usually a two hand job with those as well.
Lawrence. |
26th Mar 2019, 10:33 pm | #43 | |
Dekatron
Join Date: May 2008
Location: Derby, UK.
Posts: 7,735
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Re: PIL - Colour fringing
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Code:
10MODE4 20M%=3 30S%=64 40IF M%AND1 PROCHB 50IF M%AND2 PROCVB 60K$=GET$ 70IFK$>="0"ANDK$<="7" VDU19,1,ASCK$AND7;0;:GOTO60 80IFK$="H" M%=1 90IFK$="V" M%=2 100IFK$=" " M%=3 110CLS 120GOTO40 130DEFPROCHB 140FORY%=0TO1023STEPS% 150MOVE0,Y%:DRAW1279,Y% 160NEXTY% 170MOVE0,1023:DRAW1279,1023 180ENDPROC 190DEFPROCVB 200FORX%=0TO1279STEPS% 210MOVEX%,0:DRAWX%,1023 220NEXTX% 230MOVE1279,0:DRAW1279,1023 240ENDPROC Press number keys to select colours: usual BBC colour numbers, i.e. 1=red 2=green 3=yellow 4=blue 5=magenta 6=cyan 7=white. Press H for just horizontal bars, V for just vertical bars, space for full grid, Escape when done. I hereby relinquish all copyright in this code and dedicate it to the Public Domain.
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If I have seen further than others, it is because I was standing on a pile of failed experiments. |
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26th Mar 2019, 11:34 pm | #44 | ||
Rest in Peace
Join Date: Apr 2008
Location: London, UK.
Posts: 2,508
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Re: PIL - Colour fringing
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I used to look after a fleet of professional video monitors that often needed CRT adjustment / replacement as they had a hard life travelling the world. One factor that you learn with experience is strategy. When to carry on tweaking multipoles, when to backtrack and start again with the DY position because the convergence is screwing up the purity, when to stop poking around with permalloys and accept that the tube is a less than perfect example that simply can't be got any better, and when to accept that the result is in-spec and the law of diminishing returns is about to deprive you of a tea-break unless you put the back on and send it on its way. |
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27th Mar 2019, 1:15 pm | #45 | |||||
Octode
Join Date: Jun 2018
Location: Essex, UK.
Posts: 1,307
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Re: PIL - Colour fringing
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I wouldn't let my guard down if wearing gloves, I know that there's still risks even with gloves, but they'd be there as an extra safety line. I'd need to stand up too, the TV would have to get moved to the kitchen counter or the dining table as it's stand is too low down. Quote:
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Hi, I never thought of that! I don't have a 1980s computer, so of course couldn't but I have got beebem. I did once try getting my Xbox to show a grid pattern, but failed to get a full screen grid. Thanks for that code, anyway! I might still end up using it if I can't get a proper grid elsewhere. Quote:
Of course my set could be like you say, can't get any better. Hopefully it can, as it could potentially straighten out the wonky picture. Fingers crossed some improvement can be made Thank you all for your help! I really appreciate it! |
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27th Mar 2019, 1:47 pm | #46 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: PIL - Colour fringing
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27th Mar 2019, 2:10 pm | #47 |
Octode
Join Date: Jun 2018
Location: Essex, UK.
Posts: 1,307
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Re: PIL - Colour fringing
Fair enough
Will do, I've got a pretty big mirror I can use which should do the job. Thanks |
27th Mar 2019, 7:26 pm | #48 |
Hexode
Join Date: Mar 2012
Location: Liverpool, Merseyside, UK.
Posts: 453
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Re: PIL - Colour fringing
Could you not just use the test card DVD available in the stickies? Assuming you have the means to burn a disc you could play this on a DVD player via a VCR into the aerial socket.
Does the BBC computer allow writing to the edges of the screen? I know other 8 bit computers had a fairly large border that couldn't be written to. |
27th Mar 2019, 9:43 pm | #49 |
Octode
Join Date: Jun 2018
Location: Essex, UK.
Posts: 1,307
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Re: PIL - Colour fringing
Hi,
I have just looked into them and could possibly try. I've been looking for ages for some blank DVDs but cannot find any anywhere. I could get them online, but I don't want to spend money which I don't really have on a pack of DVDs, and just use one or two. I might have a wire somewhere to connect my PC to my VCR to use the Beebem, which is why I went with the BASIC idea. Thanks |