25" Amplifone/Wellsgardner Vector Monitor Yoke winding and information

The foldover could be caused by ringing, changing the damping resistor on the horizontal yoke circuit might help ?
 
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The foldover could be caused by ringing, changing the damping resistor on the horizontal yoke circuit might help ?

Yes that might help but this is a tested and perfectly working chassis PAT 9000 setup. It works with other yokes. This is a yoke issue. Now maybe it could have something put in line with the yoke to compensate for the difference in "good yoke" to "Bad yoke".
 
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True, it is a different yoke - but you're not measuring inductance, so you don't know if it's identical to your other yokes or not. With varying inductances and parasitic capacitances you potentially need a different damping resistor.

Since you're probably trying for identical inductance, you might want to get a cheap inductance meter. I use this one, it was only $50 https://www.amazon.com/gp/product/B00GYT5WL8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Take everything I say with a grain of salt, too, I read a lot but haven't done a rewind yet myself so I'm probably full of crap...
 
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True, it is a different yoke - but you're not measuring inductance, so you don't know if it's identical to your other yokes or not. With varying inductances and parasitic capacitances you potentially need a different damping resistor.

Since you're probably trying for identical inductance, you might want to get a cheap inductance meter. I use this one, it was only $50 https://www.amazon.com/gp/product/B00GYT5WL8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Take everything I say with a grain of salt, too, I read a lot but haven't done a rewind yet myself so I'm probably full of crap...

I do have a yoke tester. I will be comparing these to actual commercial 6100 yoke but since I'm trying to achieve reproducesble results to work without modifications to the chassis. I get varying results but if they are because of the ferrite I am not winding then other solutions are needed. Or we just accept mediocrity.
 
I took the two 19" small ferrite yokes they ohm twice what I want for the horizontal ferrite and the original hand wind with mag 22 wire is too big, ohms are way to low. 1 to 2ohms I need more like 5 ohms when done. reading one ferrite with 22 mag 57mm wire is about .5 to .6 ohms so when in parallel is more like 1 to 2 ohms way too low.

Planning to try and wind my own 19" Amplifone but was a bit confused by the bit you have written above. I have number of donor tv tubes and understand it would be best to pick one with something close to the correct readings on the horizontal. I plan to go through them all and get the readings, can you please tell me what I should be looking for?

Thanks
 
Planning to try and wind my own 19" Amplifone but was a bit confused by the bit you have written above. I have number of donor tv tubes and understand it would be best to pick one with something close to the correct readings on the horizontal. I plan to go through them all and get the readings, can you please tell me what I should be looking for?

Thanks

At this current point anyone trying to wind a 19" yoke would best pull up on old yoke winding thread and follow those directions. I am a tying other things on this particular thread. Otherwise follow along and wait for the results like the rest of us including Me.

The best results I can think of currently were 22mag wire .57mm or so and like 74 winds straight across spilt in half. thats 36 or 37 winds with a 1 1/2 wind crossover and then 36 or 37 winds laying in-between the first row as best as possible. I also think that Large Neck tube CRT are best at this point and possibly just using a 25" tv yoke wound on the 19" tube. Also this can't be confirmed just yet by me, I think that positive results have been achieved by others doing good work on this particular subject. As that is where my information started, with the work of others. And I thank them again. You Know Who You Are.
 
At this current point anyone trying to wind a 19" yoke would best pull up on old yoke winding thread and follow those directions. I am a tying other things on this particular thread. Otherwise follow along and wait for the results like the rest of us including Me.

The best results I can think of currently were 22mag wire .57mm or so and like 74 winds straight across spilt in half. thats 36 or 37 winds with a 1 1/2 wind crossover and then 36 or 37 winds laying in-between the first row as best as possible. I also think that Large Neck tube CRT are best at this point and possibly just using a 25" tv yoke wound on the 19" tube. Also this can't be confirmed just yet by me, I think that positive results have been achieved by others doing good work on this particular subject. As that is where my information started, with the work of others. And I thank them again. You Know Who You Are.

Thanks for the reply and information. Yes, think I have read through all the old threads a few times now. Will re-read and search for more, sometimes it's hard to understand or dig out those critical bits of information.
 
Back to the 19" tubes.

CR31 tubes prove to be a challenge. I keep getting messed up characters with the CR31 yokes I am using. The best result was with the 25" wound yoke but it doesn't fit very good at all. In fact it is kind of a pain in the ass. At this point 19" CRT might best be using 25" yoke on a 100 degree tube, but those are so rare and should go to wg6100 chassis repair, I must find an acceptable wind for these tubes. I will go back to the 22Mag wire and winding it straight across with the 1 1/2 winds back with the second row. I think I will wind one and just wrap it up with out being so meticulous. I don't think it will matter as there really isn't enough room on the ferrite to lay the rows down nice and even spaced and flat.

I also tried to wrap a yoke from a couple of 20" CRTs as I had them from the pile and they don't work well either. Most of them have the rings attached and are from CR23 tubes so they don't fit very well around the tube and are rather long for the skinny 90˚ tubes.. I am taking the wrapped ferrites I have and transferring them to a variety of yokes to see if they work and I got one from a Sony trinitron that gave me some weird results and the rest are varying of bad to Ok. I have one more 20" yoke to try and then I move on to the 19" yokes and resort back to a combination of the current wind with older techniques that gave the best results yet. I hope to have a successful and productive day.
 
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PROBLEM WITH PAT9000 after all... Needs Help

OK so I decided to replace the 7924 VR on my Stock Amplifone set up and There is definitely a difference between that and My DEZ PAT 9000 setup..I get these wavy lines and instability in the field sometimes and then others it seems stable.

That being said I was wondering why my older wound yokes weren't giving me any result I was happy with when before I moved I wasn't happy but I had something that would work. So after I switched the chassis I started getting familiar results. Not perfect but not hieroglyphics in the type. At least I could read the text.

So I decided to start from scratch with a "New" tv Set UP with a CR31 Tube. I left the yoke on the tube and removed the ferrites. I then wound them with MAG26 wire (0.36mm or 0.37mm wire) following the current wind pattern 10 wraps then start 30 wraps with space cross over 30 more wraps with space. Then back wind 1 1/2 wraps to beginning of pattern and repeat 30 wraps (2nd layer, 1st layer, 2nd layer, 1st layer, alternating all the way across. Then cross over one wrap and finish out the 2nd quarter 30 wraps alternating. Ending with 10 wraps.

This pattern just fits on the small CR31 ferrite with no room to spare. Nice and even and flat and neat. Neatness counts! My only mistake was to not degauss the tube before I started.

BEST RESULT YET

I think I found the CR31 wind finally.
The picture Is Great and if I hadn't messed with the rings I probably wouldn't have had to really converge the screen much at all just a few strips. I think I have my Major Havoc Tube Finally and might have tubes for sale if I can reproduce this result. Nice square picture converged almost perfectly and the characters are really clear. This is Amazing. Too many pictures to post. I will Start with the Tube, The ferrite, and the Wind.


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This Particular Tube when you wind the yoke there are two resistors on the bottom of the little board on the yoke. They MUST be removed or they will tie your wind together and do something nasty I think. I didn't find out as I saw them and removed them as this is not part of our circuit.
 

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I am now going to wrap another similar yoke and see if I can reproduce these results. If I can then we are really making progress and I just need a little help with my DEZPAT9000 setup to match my standard Amplifone setup. Here are some more Pictures. More to follow after I get this into the Major Havoc. I can't believe that most of the stars are all aligned and white!
 

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That's looking very nice. And in fact, the same CR31 tube I have sitting in the storage room.

Watching your progress very closely now ... :)
 
Well I definitely have issues with one or two of my chassis. I have to swap deflection boards with my current standard test setup and Major Havoc and I definitely have issues with my Major Havoc. The Star Wars is solid and the Tempest is Solid so I will test with these boards. I am still trying to get a good image on the Major Havoc and might have to finish the repo Board to see a good working Major Havoc graphic image. My game is playable but I have vector problems. I must first try and set BIP settings and see if this helps.


The monitor looked great before the transfer to the game and then it looks a little funny now that it is moved. I will have to see what is different but the second yoke took to the tube great as well. Almost no converging necessary.

This new idea for the wind might be the right direction. I was thinking and probably metered out the original yoke wrong and the wound side we are going for is like 1.2 ohms not 0.5 ohms. so I started thinking that according to ohms law more wraps is more resistance thus a lower reading and that is not what I wanted. I was trying to get the value up rather than down with more wraps and an neater finished product. So that being said I need less resistance for a bigger value of resistance so I went with the smaller wire. and my finished 1/2 game me a value of 1.3ohms so that when cut in half for the parallel resistance gives me a value of 0.6 ohms which was better than the 0.3 ohms I was getting with the larger wire and couldn't get a nice flat smooth pattern. I think that this is a better solution but I can't be sure Just yet.

I must make a few more adjustments before I claim to have found THE SOLUTION.




I will post pictures Later
 
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That's looking very nice. And in fact, the same CR31 tube I have sitting in the storage room.

Watching your progress very closely now ... :)

This Particular Tube when you wind the yoke there are two resistors on the bottom of the little board on the yoke. They MUST be removed or they will tie your wind together and do something nasty I think. I didn't find out as I saw them and removed them as this is not part of our circuit.
 
I think that we are dealing with more like a MED resolution monitor in general even tho we know this as the original Amplifone tubes are MED resolution tubes. Well the yoke being homed out is more like the readings on my 25K8104 monitor which is almost the same at 1.7ohms and 0.5ohms. I am going to start a Hand Wound Vector Tube Success and Failures Thread so people who attempt to wind their own yokes based on information provided can their information based on their experience. I am interested if this information proves to have results other than my own experience as I only have the 3 working Amplifone setups and I guess I need to make another one from scratch to have a "Brand New" Stock setup to compare things with.

I need a source for the Degausing Switch for a Both of my boards. I am off work one more day before the weekend so I get to do a lot of A - B -C and back again to see what is different with my 3 systems and why.
 
Think I have the same/similar tube here, attached pic. Cant remember the TV I found it in but already have it mounted in a spare frame as I started building it up as a raster monitor. Looks like that might be my vector tube :)

Anyway, sounds good, well done.
 

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the original Amplifone tubes are MED resolution tubes.

I wonder who was the first to make this claim, probably Jesus Christ in person as everyone took it as gospel. It's an M tube, which is a tube for professional monitor and doesn't mean medium resolution or else the tubes in PC monitors (all M type) would also be med res when they're actually for hi res. It's just a tube with finer pitch and dotted shadow mask instead of a slotted one found in A tubes.
 
I wonder who was the first to make this claim, probably Jesus Christ in person as everyone took it as gospel. It's an M tube, which is a tube for professional monitor and doesn't mean medium resolution or else the tubes in PC monitors (all M type) would also be med res when they're actually for hi res. It's just a tube with finer pitch and dotted shadow mask instead of a slotted one found in A tubes.

Yea well we already established that sometime ago.
I am also stating that the yoke winding is geared for a Med reds type chassis as the range is too low for them to bested on standard resoulution chassis. Similar n range to my 25K8104.
 
Here is the tube I've been working on installed in the Major Havoc with 8 strips and I'm using the space duel to align it as my Major Havoc board has a vector problem.
 

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My second CR31 tube yoke was wound the same with the same results. I got a nice square box and the three guns were nicely aligned. I expect I will be able to converge this tube with about 8 to 10 strips maybe less. Probably offer this one for sell. As I need the space for the CR23 tube project. I'm guessing it will be the same wind and hopefully a wire guage I already have on hand. I will post pictures of the second tube without any convergence later tonight. That's really the key, thevnice square box already aligned not needing to be honed in with a bunch of strips and "magnets". I have pictures of the wind and will show step by step on the last CR31 yoke for my 13" test monitor. Here is a preview to that.
 

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