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<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial;color:navy'>Some
very helpful suggestions! I am interested in this idea of tuning the
crystals—might not come to that if the card im taking home today does the
trick, but I guess this way could save me from having to buy anything short of a
few inches kynar wire. A few questions:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></p>
<p class=MsoNormalIndentCxSpFirst style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-size:10.0pt;font-family:Arial;color:navy'><span style='mso-list:
Ignore'>1)<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Last night I tried
putting ceramic magnets near and on the s-video plug to see if this would
somehow shield it from weaker oscillating fields generated by the vga cord
nearby or the card’s internal electronics.. don’t think it made a
difference but I was running up and down the stairs trying to notice the
difference as I made changes… not all that reliable. <o:p></o:p></span></p>
<p class=MsoNormalIndentCxSpMiddle style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-size:10.0pt;font-family:Arial;color:navy'><span style='mso-list:
Ignore'>2)<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
style='font-size:10.0pt;font-family:Arial;color:navy'>If I try the crystal
trick—first of all, is the crystal (only one of these on the geforce FX
board I have on my desk here) a little silver, oval shaped canister with two
connections soldered to the board? If so, I would simply solder a wire to
each of the two pins on the back and then experiment with number of
twists? Leaving the insulation on, of course…<o:p></o:p></span></p>
<p class=MsoNormalIndentCxSpMiddle><span style='font-size:10.0pt;font-family:
Arial;color:navy'><o:p> </o:p></span></p>
<p class=MsoNormalIndentCxSpMiddle><span style='font-size:10.0pt;font-family:
Arial;color:navy'>Thanks<o:p></o:p></span></p>
<p class=MsoNormalIndentCxSpMiddle><span style='font-size:10.0pt;font-family:
Arial;color:navy'>Will<o:p></o:p></span></p>
<p class=MsoNormalIndentCxSpLast><span style='font-size:10.0pt;font-family:
Arial;color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></p>
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<hr size=2 width="100%" align=center>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:Tahoma'>From:</span></b><span
style='font-size:10.0pt;font-family:Tahoma'> mythtv-users-bounces@mythtv.org
[mailto:mythtv-users-bounces@mythtv.org] <b>On Behalf Of </b>Brian Wood<br>
<b>Sent:</b> Thursday, June 08, 2006 11:41 AM<br>
<b>To:</b> Discussion about mythtv<br>
<b>Subject:</b> Re: [mythtv-users] Stupid S-Video Problem Continues</span><o:p></o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal>On Jun 8, 2006, at 9:19 AM, Will Constable wrote:<o:p></o:p></p>
</div>
<p class=MsoNormal><br>
<br>
<o:p></o:p></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Yea—I was very
aware of the ‘rule breaking’ I was doing… I origionally
planned on putting the computer by the TV and running network to it. Lets
just say that wouldn’t fly for aesthetic reasons—the computer is a piece
of junk with noisy drives and fans, and an ugly case—it belongs out of
sight and the room the TV is in has been decorated nicely and everything…
So I decided to try the video and audio—I really hope I can make it
work—before I terminated the cable as it is now, I put s-vid ends on the
two ends of the spool of cat 5 and ran the whole 100 ft from my main myth
server to the TV and found the picture to be fine; that’s a Geforce 4
ti4200 while my new box uses an ‘el cheapo’ mx420 that was lying
around—it could be anything you mentioned regarding ground loops/vga
signal differences, but my first try will be a friend’s geforce fx
that’s lying around at work.. if that fixes things, I’ll just be
happy at that.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:Arial;color:navy'> </span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal>As I said, different video cards will behave differently
simply because of slight differences in the crystal oscillator frequencies,
sometimes.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>If you are handy with electronics here's trick that can
sometimes work:<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal>Locate the quartz (actually tourmaline) crystal on the card,
there are usually 2 or more of them so you might have to try this with each.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>Solder a short (1 inch or so) piece pf #30 or 32 AWG Kynar
wire (the kind used for wire-wrapping) to each side if the crystal.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>Twist the two wires together for 2 or 3 turns, making sure
the exposed metal ends do not touch each other or anything else.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>See if it makes a difference, if not try adding or
subtracting a turn or 2, or moving the wire towards or away from the circuit
board.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>If you get to where things work the way you want, put a dab
of RTV silicone over the whole thing to protect and stabilize it.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>What you are doing is creating a "gimmick"
capacitor of a few picofarads, thus shifting or "trimming" the exact
frequency of the crystal a little bit. Note that you can only move the
frequency down by this method, not up, which requires a different sort of hack.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>Obviously I can't be responsible for any damage you might do
to your card, your self or your manly self-image by trying such things, but
they have worked for some folks.<o:p></o:p></p>
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