Guys,

just scored a set of G90 KD-22-22 focus yokes and like to
know of those people that have had them installed about their experiences.

no problems at all since the install ?


any new tips to even improve them more ??


Thanks


Michael

Antorsae is the only one I know who modded a G90 yoke for the marquee, ask him. he had posted in one of the frankenyoke threads here with pics of it, its much bigger than the 1292 yoke.

Athanasios

Antorsae is the only one I know who modded a G90 yoke for the marquee, ask him. he had posted in one of the frankenyoke threads here with pics of it, its much bigger than the 1292 yoke.

Athanasios

hope it fits !!

Michael

I will post my experiences with the G90 yokes tonight!

Long story short: yes, they work, they are WAY more difficult to adjust than KD22-22 ones but have other benefits.

I have them working on my blend beautifully, but I plan to move the G90 yokes to my spare 9500LC and put a new set of KD22-22 yokes I JUST procured into the blend. Why? to have my two projectors perfectly matched.

I will post my experiences with the G90 yokes tonight!

Long story short: yes, they work, they are WAY more difficult to adjust than KD22-22 ones but have other benefits.

I have them working on my blend beautifully, but I plan to move the G90 yokes to my spare 9500LC and put a new set of KD22-22 yokes I JUST procured into the blend. Why? to have my two projectors perfectly matched.

cool, thanks, can't wait for the instructions

Michael

I will post my experiences with the G90 yokes tonight!

Long story short: yes, they work, they are WAY more difficult to adjust than KD22-22 ones but have other benefits.

I have them working on my blend beautifully, but I plan to move the G90 yokes to my spare 9500LC and put a new set of KD22-22 yokes I JUST procured into the blend. Why? to have my two projectors perfectly matched.


so what advantages do the G90 yokes have ?

and what about the disadvantages ?


Thanks

Michael

Yes - it fits but it is a pain in the ass to adjust. Here's my experience:

- The G90 yoke is significantly larger than the stock Marquee yoke, as a result the CPC magnets are now much further back (almost touching the metal housing of the neck board).

- I did reverse the yoke core on all three yokes. This may not be needed, but if you dont do it make sure you set contrast to 10 or so when you turn it on for the first time, as you may need to level the deflection yokes to compensate for a 15 degree or so angling.

- There is no blooming, even at contrast 100.

- The G90 yokes do have more windings. In addition to controlling regular astig as the Marquee ones do, they also can control triangularity electronically. The problem is that you have to choose which windings you use, as you only have two "astig" controls in the Marquee.

- You need to identify each pair of windings to find out which do static focus, dynamic focus and the astig windings. I just used a Multimeter and measured DC resistance. It gives you an idea of which is which (check out the frankenyokes thread). If you find it difficult I could take a pic and you can try to identify the colors.

Good luck!

Thanks Andres for the info.

need the yoke plastic housings to be swaped against the Marquee ones ?

Thanks


Michael

Thanks Andres for the info.

need the yoke plastic housings to be swaped against the Marquee ones ?

Thanks


Michael

No you'd use the sony housing, the marquees is way to small unless you used two of the bigger sides, you'd need an extra set of housing for that.

Athanasios

No you'd use the sony housing, the marquees is way to small unless you used two of the bigger sides, you'd need an extra set of housing for that.

Athanasios

Thanks , what are your experiences with the new yokes Athanasios ?


Michael

Yes, I am curious of the improvement as well. I have done MP modded neck boards and VIM as well as 2,4,6 magnets. Changed the lenses to HD10F. Definitely a vast improvement. But with VDC rebuilt tubes, I could never get the spot shape right and the max resolution in still around 1280x960 before the lines overlap. With KD22 yokes, would I be able to improve the resolution even further? And if so, would I be able to drive it harder to create a brighter picture while maintaining that improved resolution?

Dave

I ahve not done this mod yet as its very hard to find the yokes. Antorsea is the one who has them, one set of the yokes from a 1292 and he has G90 yokes as well. Not sure which he thinks is better. All I know is that the G90 yokes are very large and take up a lot of room on the neck. not sure how he used the cpc magnets or if he used the ones buitl itno the G90 yokes.

Athanasios

I use the Marquee CPC magnets with the G90 yokes. There's barely room, but they fit. There are equivalent windings for triangularity controls in the G90 yokes but it is better to leave them alone and connect the regular astig windings, because the Marquee has only two astig drivers per tube (not 6 like the G90 would require).

The G90 has an additonal yoke (which I have, but I have not used) that controls the equivalent of the 2-4 pole CPC magnets electronically. The Marquee doesn't have drivers for this.

As for which one is better: the 1292 is easier to adjust; as there is more physical room to touch the CPC magnets. G90 ones, once adjusted provide similar performance.

As for which one is better: the 1292 is easier to adjust; as there is more physical room to touch the CPC magnets. G90 ones, once adjusted provide similar performance.


better or slightly worse than 1292 ?

Michael

Similar performance. All things equal, I prefer the 1292 ones as they are easier to adjust.

Yes, I am curious of the improvement as well. I have done MP modded neck boards and VIM as well as 2,4,6 magnets. Changed the lenses to HD10F. Definitely a vast improvement. But with VDC rebuilt tubes, I could never get the spot shape right and the max resolution in still around 1280x960 before the lines overlap. With KD22 yokes, would I be able to improve the resolution even further? And if so, would I be able to drive it harder to create a brighter picture while maintaining that improved resolution?

Dave
The frankenyokes will help with a tighter focus, so you should have more lines before you get your overlap. Also, you can drive the tubes quite high before blooming, so you should get improvements on both fronts.

Are the KF22-22 yokes available as new parts from Sony any more? If they are, does anyone know what kind of costs are involved?

Dave