convert g07 to low impedance

redelf

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Has anyone ever tried to do this. It would seem so much easier to do this than to
swap out the coils from the tube to the donor tv tube. I've been out searching
through some tv's lately and I keep coming up with low impedance instead of the
high impedance that the g07 wants.
 
Has anyone ever tried to do this. It would seem so much easier to do this than to
swap out the coils from the tube to the donor tv tube. I've been out searching
through some tv's lately and I keep coming up with low impedance instead of the
high impedance that the g07 wants.

When doing a tube swap, keep the yokes with the chassis and the rings with the tube. Theres no way you can get around it safely. Its not that hard though.
 
Have allready done a tube swap this way. I was looking for a way to convert the chassis of the g07 or for that matter any chassis to either a high or a low impedance. There are a ton of tv tubes that have low impedance yokes but many more chassis that want high impedance.
 
When doing a tube swap, keep the yokes with the chassis and the rings with the tube. Theres no way you can get around it safely. Its not that hard though.

Not exactly true, I am SURE someone with enough know how cold pretty easily turn the g07 into one that would work with a low impedance yoke. For the Wei-Ya chassis it is one cap and two resistors as outlined at the bottom of this page... http://www.8liners.com/datatech/monitor.html

Swapping a cap and a couple resistors would be WAY easier that a yoke swap and convergence especially since most of us dont have a pattern generator handy.


-Ken
 
Any time you swap the tube in a monitor, you really ought to keep the deflection yoke with the chassis. Even if two yokes read close to the same in terms of DC resistance (what you're checking with the meter), they aren't necessarily the same when it comes to inductance (what the chassis cares about). A monitor's deflection circuitry is designed to operate with the yoke that goes with it. You can't be certain that it will work properly with a different yoke. Sometimes it'll work, other times it'll work but the screen geometry will be off and you won't be able to adjust it out. Other times if the yoke is way off, you'll simply burn out the deflection transistors in the monitor (usually this only happens when the DC resistance is way off too...).

Some chassis have deflection circuits designed to work with a range of yokes - and a host of controls to compensate for differences. These are generally the aftermarket replacement chassis, like those 8-liners ones.

But, when it comes to replacing the tube in, say, a G07 - just swap the yoke over. Yoke stays with the chassis, rings stay with the tube. Before you remove the yoke from the old tube, mark the top such that it lines up with the anode connection. Line it up the same way on the new tube. Mark the rings on the new tube so you can put them right back once you've swapped the yoke on.

-Ian
 
Not exactly true, I am SURE someone with enough know how could pretty easily turn the g07 into one that would work with a low impedance yoke. For the Wei-Ya chassis it is one cap and two resistors as outlined at the bottom of this page... http://www.8liners.com/datatech/monitor.html

-Ken

NO! Not easy with Electrohome.

Also, that link to the 8liners site references changes to the JEN SHINN chassis which they do not sell any more. It does NOT apply to Wei-ya monitor boards. 8liners has not updated that page to reflect that they only sell Wei-ya chassis now.
 
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