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royuk
Joined: 28 Dec 2007
Posts: 41
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| Posted: Sat Feb 23, 2008 12:16 am Post subject: |
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Update:
Had some interesting info from Greg Eisemann.
It may well just be down to convergence error.
Bow and skew on center, top to bottom grid.
Will try adjusting this as my set-up is not perfect.
May well take some time but as soon as i get a result i will post back!
Be patient for now 8)
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JAM
Joined: 11 Mar 2006
Posts: 13
Location: Finland
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| Posted: Mon Mar 03, 2008 5:49 pm Post subject: |
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In my case it was only H-linearity missadjusted by previous owner...
That 18kHz adjustment pot in Hdef board was set to min 
Jope
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royuk
Joined: 28 Dec 2007
Posts: 41
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| Posted: Tue Mar 04, 2008 10:22 pm Post subject: |
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Does this mean you have fixed the problem?
If so, what exactly happens when adjusting that 18khz pot?
I might get a look at mine this weekend and it is now confirmed that a professional calibrater will be looking at my set-up at the beginning of April so i don't want to waste much time as we will be starting from scratch when he arrives!
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JAM
Joined: 11 Mar 2006
Posts: 13
Location: Finland
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| Posted: Mon Mar 10, 2008 3:34 pm Post subject: |
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| royuk wrote: | Does this mean you have fixed the problem?
If so, what exactly happens when adjusting that 18khz pot? |
Yes, it is fixed now.
When adjusting that pot from min this "shadow line" moves to left and out from pic.
And as described this pot is linarity adjustment, so linearity is now ok too (that bad linearity
both sides of shadow). You have to use 18kHz, or near that, signal when adjusting this pot.
I just used 15,6kHz (PAL) to get rid of that line with this pot 
There is also 15kHz adjustment with adjustable coil. I didn't touch it...yet.
I don't know what adjustments 1209 have...
Jope
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royuk
Joined: 28 Dec 2007
Posts: 41
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| Posted: Tue Mar 11, 2008 10:31 pm Post subject: |
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Thanks Jam!!
I've decided to leave things until the calibrater comes in early April.
I will make him aware of what you've told me incase it can help my situation.
Will post again after that time 
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