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J Kildare
Joined: 28 Sep 2006
Posts: 164
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| Posted: Fri Sep 26, 2008 1:32 am Post subject: Marquee... moving convergence and focus ahead |
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just thinking out loud here.
My machine is not subject to any vibration, or any reason for magnetics to move so.....what would happen if I decide to cut off half of the clamp mechanisim on the convergence yoke and use skinny tie wraps and hot melt glue to hold it in place after aligning it? I can then move the focus coil forward about an eight inch or so. Is there enough tolerance built in that the two fields will not conflict?
c'mon tell me what i wanna hear 
Jim
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Fri Sep 26, 2008 3:09 am Post subject: |
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try it, if it doesnt work out can always move it back and those parts are cheap if you need knew ones I may have a few. that is what Gallen did with the franken yokes, but he sorta milled the focus calm flange down thinner to fit under the convergence magnets stil using the original clamp, at least thats how i think he did it.
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Sep 29, 2008 9:08 pm Post subject: Re: Marquee... moving convergence and focus ahead |
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| J Kildare wrote: | I can then move the focus coil forward about an eight inch or so. Is there enough tolerance built in that the two fields will not conflict?
c'mon tell me what i wanna hear
Jim |
what's that gpoing to do for you? The reason the EM focus is adjustable in the servie menu for each tube from 0 to 100 is to account for small differences in the coils location on the neck. Scotting it too far forward could easilly put the coil outside of it's adjustment parameters.
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Tue Sep 30, 2008 1:09 am Post subject: |
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Hello
Try removing the convergence yoke and move the focus yoke around to see if there is any benefit. Or, give me a day or two to try it here.
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J Kildare
Joined: 28 Sep 2006
Posts: 164
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| Posted: Tue Sep 30, 2008 3:20 am Post subject: |
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| Tim in Phoenix wrote: | Hello
Try removing the convergence yoke and move the focus yoke around to see if there is any benefit. Or, give me a day or two to try it here.
. |
Say Tim, if you could do that it would really be appreciated, as my machine is on the ceiling fully set up. I am planning on taking it down and doing some work to it, but not for a few months.
If you do this could you make a note of the line width before and after? Wondering if we can tighten up the lines a little.
Thanks,
Jim
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zGman
Joined: 22 May 2006
Posts: 599
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| Posted: Tue Sep 30, 2008 4:45 am Post subject: Focus coils |
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Hi,
The reason I moved my 1292 coils further forward was so that
I needed less center zone compensation. This had the (hoped for)
effect of improving the side zones.
I actually removed the clamp on the conv coil and machined the
housing for the 1292 coil to fit over the little clamping fingers....
I think the stock coil would just slide right up there with good clearance.
Tim has a great idea to remove the conv yoke for a test - I hope he will do that experiment.
It all seems to depend on the magnetic field strength for each type
of coil. Setting up a 909 recently we found the best focus was almost
as far back as possible. Big surprise for me....
G
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zGman
Joined: 22 May 2006
Posts: 599
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| Posted: Tue Sep 30, 2008 5:12 am Post subject: |
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found some pics....
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132.98 KB |
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5867 Time(s) |
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J Kildare
Joined: 28 Sep 2006
Posts: 164
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| Posted: Wed Oct 01, 2008 3:04 am Post subject: Re: Focus coils |
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| zGman wrote: | Hi,
The reason I moved my 1292 coils further forward was so that
I needed less center zone compensation. This had the (hoped for)
effect of improving the side zones.
I actually removed the clamp on the conv coil and machined the
housing for the 1292 coil to fit over the little clamping fingers....
I think the stock coil would just slide right up there with good clearance.
Tim has a great idea to remove the conv yoke for a test - I hope he will do that experiment.
It all seems to depend on the magnetic field strength for each type
of coil. Setting up a 909 recently we found the best focus was almost
as far back as possible. Big surprise for me....
G |
Galun
I read where you did that and thats what got me thinking. I have shaved off as much silicone from around the HV lead to the tube as I dare to push everything forward. This is something that MP has remarked on in several threads in the past.
I have a set of 22-11 coils, and am wondering if it would be of any benefit changing out the stock ones, even accounting for the loss of electronic stig control.
Jim
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Wed Oct 01, 2008 3:29 am Post subject: Re: Focus coils |
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| J Kildare wrote: | | zGman wrote: | Hi,
The reason I moved my 1292 coils further forward was so that
I needed less center zone compensation. This had the (hoped for)
effect of improving the side zones.
I actually removed the clamp on the conv coil and machined the
housing for the 1292 coil to fit over the little clamping fingers....
I think the stock coil would just slide right up there with good clearance.
Tim has a great idea to remove the conv yoke for a test - I hope he will do that experiment.
It all seems to depend on the magnetic field strength for each type
of coil. Setting up a 909 recently we found the best focus was almost
as far back as possible. Big surprise for me....
G |
Galun
I read where you did that and thats what got me thinking. I have shaved off as much silicone from around the HV lead to the tube as I dare to push everything forward. This is something that MP has remarked on in several threads in the past.
I have a set of 22-11 coils, and am wondering if it would be of any benefit changing out the stock ones, even accounting for the loss of electronic stig control.
Jim |
Chris Johnson who first expirimented with the yokes you have said they focus so much better you dont really need the electronic astig, but he also said he used 6 pole CPC magnets.
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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zGman
Joined: 22 May 2006
Posts: 599
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| Posted: Wed Oct 01, 2008 3:56 am Post subject: Focus Coils |
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Hi Jim,
It sounds like you will have some testing to do then, the zone stig is a very handy
tool for working on corner/side focus - but having the beam control of the KD coils
is a big improvement. We talk a lot about improved focus, but the real improvement
is what I would call "intra-scene" contrast - with the stock coils the bright areas
lose definition and the picture loses both depth and punch.
Good luck with your projects,
Galen
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J Kildare
Joined: 28 Sep 2006
Posts: 164
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| Posted: Wed Oct 01, 2008 11:29 pm Post subject: Re: Focus coils |
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| Nashou66 wrote: | | J Kildare wrote: | | zGman wrote: | Hi,
The reason I moved my 1292 coils further forward was so that
I needed less center zone compensation. This had the (hoped for)
effect of improving the side zones.
I actually removed the clamp on the conv coil and machined the
housing for the 1292 coil to fit over the little clamping fingers....
I think the stock coil would just slide right up there with good clearance.
Tim has a great idea to remove the conv yoke for a test - I hope he will do that experiment.
It all seems to depend on the magnetic field strength for each type
of coil. Setting up a 909 recently we found the best focus was almost
as far back as possible. Big surprise for me....
G |
Galun
I read where you did that and thats what got me thinking. I have shaved off as much silicone from around the HV lead to the tube as I dare to push everything forward. This is something that MP has remarked on in several threads in the past.
I have a set of 22-11 coils, and am wondering if it would be of any benefit changing out the stock ones, even accounting for the loss of electronic stig control.
Jim |
Chris Johnson who first expirimented with the yokes you have said they focus so much better you dont really need the electronic astig, but he also said he used 6 pole CPC magnets.
Athanasios |
Athanasios
I have the 6 pole cpc magnets and for good measure an MP modded 2035-03 vim, neck cards, and I believe vertical board. This is why I would really like a set of 22-22 frankenyokes. The last set went in like 2 minutes, and we both know who needed them, and got them. 
Jim
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Wed Oct 01, 2008 11:51 pm Post subject: Re: Focus coils |
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| J Kildare wrote: | | Nashou66 wrote: | | J Kildare wrote: | | zGman wrote: | Hi,
The reason I moved my 1292 coils further forward was so that
I needed less center zone compensation. This had the (hoped for)
effect of improving the side zones.
I actually removed the clamp on the conv coil and machined the
housing for the 1292 coil to fit over the little clamping fingers....
I think the stock coil would just slide right up there with good clearance.
Tim has a great idea to remove the conv yoke for a test - I hope he will do that experiment.
It all seems to depend on the magnetic field strength for each type
of coil. Setting up a 909 recently we found the best focus was almost
as far back as possible. Big surprise for me....
G |
Galun
I read where you did that and thats what got me thinking. I have shaved off as much silicone from around the HV lead to the tube as I dare to push everything forward. This is something that MP has remarked on in several threads in the past.
I have a set of 22-11 coils, and am wondering if it would be of any benefit changing out the stock ones, even accounting for the loss of electronic stig control.
Jim |
Chris Johnson who first expirimented with the yokes you have said they focus so much better you dont really need the electronic astig, but he also said he used 6 pole CPC magnets.
Athanasios |
Athanasios
I have the 6 pole cpc magnets and for good measure an MP modded 2035-03 vim, neck cards, and I believe vertical board. This is why I would really like a set of 22-22 frankenyokes. The last set went in like 2 minutes, and we both know who needed them, and got them.
Jim |
 Was that me or you? i cant remember honestly !!! I do have two set here now though and one extra and TSE's 22-11.
And a KF 3203 i plan to try to rewind the coils and see if i can make my own.
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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| Back to top |
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J Kildare
Joined: 28 Sep 2006
Posts: 164
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| Posted: Thu Oct 02, 2008 2:33 am Post subject: Re: Focus coils |
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| Nashou66 wrote: | | J Kildare wrote: | | Nashou66 wrote: | | J Kildare wrote: | | zGman wrote: | Hi,
The reason I moved my 1292 coils further forward was so that
I needed less center zone compensation. This had the (hoped for)
effect of improving the side zones.
I actually removed the clamp on the conv coil and machined the
housing for the 1292 coil to fit over the little clamping fingers....
I think the stock coil would just slide right up there with good clearance.
Tim has a great idea to remove the conv yoke for a test - I hope he will do that experiment.
It all seems to depend on the magnetic field strength for each type
of coil. Setting up a 909 recently we found the best focus was almost
as far back as possible. Big surprise for me....
G |
Galun
I read where you did that and thats what got me thinking. I have shaved off as much silicone from around the HV lead to the tube as I dare to push everything forward. This is something that MP has remarked on in several threads in the past.
I have a set of 22-11 coils, and am wondering if it would be of any benefit changing out the stock ones, even accounting for the loss of electronic stig control.
Jim |
Chris Johnson who first expirimented with the yokes you have said they focus so much better you dont really need the electronic astig, but he also said he used 6 pole CPC magnets.
Athanasios |
Athanasios
I have the 6 pole cpc magnets and for good measure an MP modded 2035-03 vim, neck cards, and I believe vertical board. This is why I would really like a set of 22-22 frankenyokes. The last set went in like 2 minutes, and we both know who needed them, and got them.
Jim |
Was that me or you? i cant remember honestly !!! I do have two set here now though and one extra and TSE's 22-11.
And a KF 3203 i plan to try to rewind the coils and see if i can make my own.
Athanasios |
Actually it was Arno P that snagged the set of 22-22's, probably needed them as much as anyone. I do however think you have toooo many. 
Hope you can rewind the 3203.
Jim
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Thu Oct 02, 2008 7:15 pm Post subject: |
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| J Kildare wrote: | | Tim in Phoenix wrote: | Hello
Try removing the convergence yoke and move the focus yoke around to see if there is any benefit. Or, give me a day or two to try it here.
. |
Say Tim, if you could do that it would really be appreciated, as my machine is on the ceiling fully set up. I am planning on taking it down and doing some work to it, but not for a few months.
If you do this could you make a note of the line width before and after? Wondering if we can tighten up the lines a little.
Thanks,
Jim |
Say Jim
I have to move a lot of stuff around in the shop first, so maybe by Sunday night.
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Fri Oct 03, 2008 7:27 pm Post subject: |
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Guys!
Moving the focus yoke forward gave no improvement, if anything, it was sharper moved back slightly.
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David_Web
Joined: 02 May 2007
Posts: 418
Location: Sweden
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| Posted: Fri Oct 03, 2008 8:28 pm Post subject: |
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How about moving the magnets?
Or maybe adding a second set of magnets.
_________________
SNR of people are ridiculously low.
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J Kildare
Joined: 28 Sep 2006
Posts: 164
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| Posted: Sat Oct 04, 2008 10:01 pm Post subject: |
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Tim
I appreciate you going to the trouble, it sounds like your busy. It's not quite what I was hoping for but fits exactly with what Galen was referring to above with the Barco. I have always moved the focus coils as far forward as possible, but this may not be the case in all instances.
Thanks
Jim
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