G07 monitor that won’t shrink

Shawn1976

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I have the following G07 chassie that won't shrink the picture to fit both the scores and credits.
I've already re-capped the entire chassie and replaced all of the pots on the chassie.
Where should I go from here.
Any help would be greatly appreciated.IMG_9730.jpeg
 
Yea, let's see pictures of your width coil.

If original, these are often broken in half. Or on their last breath.

Also, what is your B+?
 
That width coil looks very new. I assume you did not install it?

And the ferrite core inside looks like it has been unscrewed too far. The top of that ferrite core is normally about half way down the "tube".

If your core is frozen, I'm not sure what is recommended at this point. Just don't force it or you could risk cracking it.
 
I've used deoxit as a lube to try and convince them to move again.

I would power it down, deoxit for lube and use a metal hex key (plastic will break off if it's frozen) and firmly convince it to move.

Don't do it while powered up to free it up. The metal will get hot AF.

Once you get it back down in the barrel you can power on and use plastic tool to adjust while it's on.
 
Just make sure your B+ is 120VDC before dialing in your width coil. Otherwise you will be unnecessarily adjusting the coil to compensate for a B+ that could be too high.
Just in case you need help from @security0001 website:

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This video from Mike might be helpful on getting the width coil core unstuck.... although it looks like your core is stuck at the top. He talks about cutting new threads form the bottom on a new one.
Mike's Amateur Arcade Monitor Repair
that ferrite slug is a M6x1.0 in that coil in the video and i have a new slug which isn't released to the public until later this year and it will be a M6x0.75 so you can get a tap if you want threads the whole length of the tube on the coil. BUT: if you put an inductance meter on that coil its range is approximately 75uH to 210uH so if you adjust the travel of the ferrite slug in the coil you will see it will read from the top going to the bottom 75uH to 210uH then back to 75uH and to 210uH a second time so you don't need the ferrite to go to the top of the coil and its full adjustment range can be had by just adjusting it in the bottom where the threads are so you don't need more threads.

BTW: you can use the original slug from your original coil if you still have it which will give you more inductance adjustment range.

BTW: the new coils i have been working on for almost two years and only a few people here i have let try samples like @tron guy they will have a longer slug which will allow the inductance to range to about 75uH to 330uH which will be about 10% more range then even the original and have 50% more then all the reproductions ever had. i am always working on much better ways to improve even what we have existing on the market which in this case i had to pay for a mold to make a better and longer slug since they weren't available.
 
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