GBS 8220 CGA to VGA scaler question
- pixeljunkie
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GBS 8220 CGA to VGA scaler question
Has anyone modded these to get rid of the odd jitter that happens with them? Just curious if there is something more I can do.
- Rossyra
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Re: GBS 8220 CGA to VGA scaler question
I've read they are a lot more stable if you can run them around 4.5v. Never been arsed to try because I'm all 15ked up now, but mine jittered like a mofo before.
- pixeljunkie
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Re: GBS 8220 CGA to VGA scaler question
interesting, I'll have to give that a try.Rossyra wrote:I've read they are a lot more stable if you can run them around 4.5v. Never been arsed to try because I'm all 15ked up now, but mine jittered like a mofo before.
- trmatthe
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Re: GBS 8220 CGA to VGA scaler question
I had an LMxxxx something which would extract the sync and I tried wiring it between the PCB output and the upscaler input which did seem to help. I can try to find the p/n if you like. I'm tri-synced now so don't use the upscaler and my eyes thank me
- Hewitson
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Re: GBS 8220 CGA to VGA scaler question
LM1881?
crunchywasp wrote:During your visit you could reverse his evil honey trap and tell him you're a bit uncertain about spending an hour inside his box
- Spectre
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Re: GBS 8220 CGA to VGA scaler question
That's very useful info, think I'll buy one of these;Rossyra wrote:I've read they are a lot more stable if you can run them around 4.5v. Never been arsed to try because I'm all 15ked up now, but mine jittered like a mofo before.
http://www.ebay.co.uk/itm/280754914974
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- trmatthe
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Re: GBS 8220 CGA to VGA scaler question
Hewitson - that rings a bell, but there are also a trillion op-amps in the LM range so I wouldn't buy one without confirmation as you may just end up with some weird gain opamp If anyone is interested I can dig it out.
- kazuo
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Re: GBS 8220 CGA to VGA scaler question
I've noticed that my scaler jitters as well from time to time. I have two, so more than happy to use one as a guinea pig if anyone has any ideas.