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#61
Yesterday, 11:28 AM
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What source are you using when you see bending. Three quarter and half inch machines that don't have a TBC output can cause horizontal bending. What are you using for a signal source?
I use Paint (in W7) to crop and squeeze my pictures down. Generally I have to go down to 640x480 to get them to post. Do you think if I donate to the site, they'll let me have more space? Hmm.
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Last edited by kf4rca; Yesterday at 03:46 PM. 
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#62
Yesterday, 04:19 PM
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The bending happens regardless of the source be it from digital or TBC analog, all of my analog tape has dedicated TBC's and everything is locked to a master BB source thru a Kramer VM-1045 distro amp.
Sources are a Sony VO2860A U-Matic that's on a NOVA-800 full frame TBC. The DigiBeta doesn't need any TBC and the Type-C Sony BVH2000/3 has the internal TBC option boards. I also source from a one of those DTV converter boxes and get the same results. I'm seeing two types of bending, one related to the black subjects and the other bend is fixed at roughly 1/4 down from the top that doesn't move except when I push the horiz hold to the edge before lock is lost. Going to sub in some capacitors on test probes and see how things are affected.
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#63
Yesterday, 04:58 PM
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Having bending related to black subjects seems to indicate sync clipping at the wrong level, possibly video signal is too small peak-to-peak or at wrong DC level; or, the sync clipper itself is at fault.
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#64
Yesterday, 08:19 PM
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That's what I'm thinking as well, going to run thru the IF alignment again and keep a close eye on the sync & burst using both the sweep/marker and actual video to see how things are interacting. I'm sure it's something I'm not doing right but can't put my finger on it just yet.
Going direct composite gives similar results however I can't get my DA to go much higher than 1.5V P-P from an unloaded output. It does however make for a very nice picture without all of the lumped bumps from the coils along the way. You should see what my cat did to the set earlier today, it's posted here on Audiokarma... and I'm not too happy about it. https://audiokarma.org/forums/thread...#post-18377210
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