CurtPalme.com Home Theater Forum

jantje112 · Joined: 17 Jul 2006 Posts: 328

After reading this pages, I'm not sure. What is the best option to install the yokes in my marquee 9500.

Use them original.

Turn them around in the housing for improved focus?? (worth the effort?)

Use it with a centering ring like 1031 did?

Thanks for the advise!

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Turning them around inside the housing is a difficult task, I would use them as is and then adjust the deflection coil to level the grid to the horizon if it shifts.

Athanasios

jantje112 · Joined: 17 Jul 2006 Posts: 328

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

No, put the clamp end towards the neck cards, but this way you will have to possibly move the deflection coil as the grid might tilt about 30 degrees, now if you flip the entire coil and magnet structure inside then you wont have to adjust the deflection coil, but the best I think it to remove the windings inside flip them, then also flip the magnet structure and put them back in the housing. but that is lots of work and you need to separate the magnets and could break them.

Athanasios

antorsae · Joined: 16 Jul 2006 Posts: 297

Hi - I reversed the frankenjokes inside the houses and still had to level the deflection yokes about 20 degrees or so. Make sure you lower contrast to 10 or so when turning off your PJ before the surgery so that when you turn it on again w/ the frankens unleveled you dont get the beam outside the tube at high contrast.

Hope it makes sense.

jantje112 · Joined: 17 Jul 2006 Posts: 328

So the most easy and effective way is to just mount them (with clamp towards neckboard) and level the raster with the deflection yoke? No problems with convergence that way?

Other things to look after?

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

jantje112 · Joined: 17 Jul 2006 Posts: 328

Thanks for your advise. A friend of mine helped me with the yokes and wirings. (Actually, he did all the work, I could only watch the magic happen Smile

)

We modded the sony harness and made a set of cables from the scheme Joust PM'ed me a long time ago. Unfortunatly, the glycol in my tubes was not that good anymore. So that will be done this week.

And after that, after a periode of years and many crt's there will be an Marquee Ultra 9500, HD10F, Frankenyoke modded 03pVimmed, Green Lugged ISF Calibrated big thing on my ceiling Smile

I would like that to happen

PaulB · Posted: Mon Sep 14, 2009 3:07 pm Post subject:

The newer 2-4-6 Pole magnet rings from VDC are considerably thinner than the older style ones, all six rings take less space than the old 2-pole ring. The new style rings are just 2mm deep each!

Sorry, same old crappy camera!

Just a alternative possibility should things get tight in there. Slighty different fitting though.

**AnalogRocks** · Posted: Mon Sep 14, 2009 3:08 pm Post subject:

Hey Paul, try pulling your camera back a bit. It looks like you have it too close for it to focus.

PaulB · Posted: Mon Sep 14, 2009 3:10 pm Post subject:

PaulB · Posted: Tue Sep 15, 2009 8:25 am Post subject:

Ok, a (daft) question.

You see the end plastic ring, how is it held in place? When you take the cpc magnets apart the end ring is loose but it needs to be tight so that the main CPC magnet rings can rotate properly. Did you glue it or just use pressure from the frankenyokes being tight up behind?

I have to say, I think this is a fantastic solution to the one (possibly showstopping) down-side of using frankenyokes, well done Jarmo Thumbs Up

Thansk,
Paul

1031 · Joined: 22 Mar 2006 Posts: 657 Location: Finland

PaulB · Posted: Tue Sep 15, 2009 9:52 am Post subject:

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Just make sure you did use the 2 pole magnet , if you used the 4 pole one it wont move the grid.

Athanasios

1031 · Joined: 22 Mar 2006 Posts: 657 Location: Finland

PaulB · Posted: Tue Sep 15, 2009 1:40 pm Post subject:

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Well I am going to begin once again on this winding of the Barco coils(Barkenstiens).

I am using this winding calculator;

http://www.pronine.ca/multind.htm

Or this one:

http://www.circuits.dk/calculator_multi_layer_aircore.htm

I still have the old winds in them using 32 gauge wire for the Static coil, i do not remember what I used for the dynamic, it might have been 30, not sure but i do recall it did not cover the entire bobbin. I believe this is the reason i am having edge focus problems, i need to go to 100 in the RGB focus menu if I remember
correctly, i know it was at the max of either range. I need to start taking detailed notes Wink

One thing for sure is the Barco 1208 magnets are much stronger than the Sony 1292 coils, they match the stock Marquee coils very closely. Too bad the windings for both are off so much.

To use the calculator you need to know the inductance your shooting for, the bobbin dimensions, length and Inner Diameter and the outer diameter once you press the calculate button, you dont want the coil larger than the bobbin edges.

Measurements

I=22mm
d=45mm
D=50mm
Inside Diameter of the actual magnet core is 53 mm so the outer diameter of the bobbin could be a bit larger than
50mm.

the static value of the Thompson coils

29.9mH

Dynamic value of Thompson Coils

45.6uH

The great thing about this calculator is you can try different wire gauges and slightly lower or higher inductance values
to get the right final Od value of close to 50mm.

I think this would be handy to tune each wind to the strength of the magnet if you can't get them re gaussed.
by putting the focus magnet on the tube with no connection you can get a rough idea if its weaker than the stock
coil. So if its weaker you might try to get more inductance or lower ohms to get more current to flow creating a larger
magnetic field. if its just right then keep the values as stock.

Hopefully CJ will help out in the re-magnetizing of the cores once he gets his rig set up in a few months.

here are some screen captures of the wind calculator with the values I plan to try out.

I think I'll go to 30 gauge for the Static and 16 or 18 gauge for the dynamic, I feel the Dynamic is much more important to find the perfect values. this is where I am getting issue on the edges, more current might fix it hence the 16 guage wire.

I also have to look to see what HVPS i have in this test chassis, it might be a 34KV one i had laying around if so that also could be part of the problem for a 9 inch Thomas tube which requires 34.9KV

Athanasios

tse · Joined: 03 May 2006 Posts: 1014 Location: Sweatbucket, Fl.

A couple of thoughts about focus mags.

1. The static and dynamic windings need to be near the nominal value. Especially the dynamic. The amplifiers are designed to drive a specific inductance.

2. Lower resistance in the windings will help the static most. Less doesn't hurt the dynamic winding but there isn't any big advantage to be gained. Use the size wire that fills the bobbin.

3. If the top/bottom and left/right focus settings are best at "0" and need to go more there is a good chance that the winding is wired to the amplifier wrong. Reverse the coil connection to the amp.

Scott

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

I picked up more parts for my magnetizer jig today. Once I order the caps (no sense in scavenging at the local electronic junkshop to try to find enough of the right type) I'll be ready to start wiring it up.

CJ