NEC XG neckboard performance problem - SOLVED at last

Im not sure what you mean by that. Ive got a set on the bench here and they look pretty simular to an NEC yoke

In XG the H-deflection coil consist of two separate coil-parts (4 wires), these are either connected parallel or in series depending on the scanrate, this switching is done by relays on the H-DEF board -just like in a Marquee. The Cine 9 on the other hand only have a single coil (2 wire) H-DEF yoke which is a big problem.

Ok boys and girls.
Here are some shots performing the XG-VNB in an XG... It was more problematic than I expected, had various problems, but it works now finally, still there are things to do, but more on that later.
The testbed is an XG 75 so could not test 1080p 72Hz, so this is 1080p 60Hz.
There is the green channel as a reference, aka. original neckboard, and I must say that this neckboard (native to this XG75) performs better than mine on the XG135, still these do not perform as expected.
Blue is the XG-VNB.

What is also interesting, is that the XG CRT card runs red hot to perform this level, while the VNB is just barely warm!





Contrast: 42%





Contrast: 92%

Yes, it was a lot of work, and even more! Sometimes I wish I have never even started this. But as I'm getting closer to the end it seems to be easier. Last time I posted pictures about how it work I wisely did not mention it still had problems with the V-blanking functions, it was simply insufficient, so with bright raster the retrace lines became too apparent. Today I could fix this last issue as well, so now I have one perfectly working VNB, an other that needs this last fix otherwise tested/working, and the third awaits for the CRT socket translator gluing in -not tested yet.
It would be a bummer if it would turn out now that they behave somehow instable, eg. the white balance always drifting, but this will only turn out if all three boards will be installed in my main projector...

Because I'm still recovering from the hernia I'm not allowed to lift heavy things at all, so I'm now prohibited to work on CRTs unfortunately. However the last XG-VNB was just finished today, so now I have the full set. While I want this to work now I have a "plan B" as well. Thanks to jenum I could purchase a lot of boards from his XG1100. With that it will be possible to "downgrade" the XG to 0 series, which is actually should be better, at least in bandwidth.
Since I have a nice XG751 which needs a new system board I think I can now reach a win-win position.
-If the XG-VNB indeed working out in the 135LC, then I could use all the parts from jenum to transform the 751 to a 1100, with good system board and nice bandwidth standard for the 0 series.
-If the VNB project turns out to be failure for some reason and I fed up with it, then I could transform my 135 LC to a 1100 LC with nice bandwidth, and can resurrect the 751 with the system board of the 1351, so that would become a 135 AC, with no bandwidth improvement, but it would work good at least.

So, all three VNB neckboards got in my XG135LC, I thought it will work, but oh well, as it seems blue and red is missing the vertical blanking feature so the retrace lines are visible, or something else is the problem...
Anyway all three neckboards gave output at least.
Here are two crap pictures, the resolution I used for this shot was no less than 1080P at 110Hz, which is 310MHz pixel clock. 
Of course there is that peaking-like artifact, that is present on all three colors, but I think this project deserves that little more effort to finish.

Yes, as I said on the red and blue neckboards I still have a problem with the vertical blanking, the green works however, and the problem is sure with the boards because the retrace lines following the boards, but apart from that the gain is similar on all three boards, AKB works etc.