Len, I think you hit the nail, damnear on the head. The OP doesn't need to upgrade the set, just the source.
When a 16:9 image is recieved on a 16:9 set, all is well. A 4:3 image can be set a number of different ways. They all use whatever name they want, stretch, expand, panoramic, who knows. I think it may also be called anamorphic, but I am not sure right now.
Well in this mode, while they stretch the sides, they do not compress the middle.
Now there are two ways to do this, and I am a bit unfamiliar with most of the WS models. I am working on one now and have the print, so that means in a few days I will know alot more. But for now, however they do it, there are two scenarios.
Most of the main H scan circuits in these things could have a relay. That would be to switch in different scan modes, but I don't mean switching from NTSC, to 720, to 1080, but for this mode. Of course different convergence settings are needed. Many HDTVs have also simply left out the NTSC mode, that is what scan converters are for. Actually this "strech the sides" mode can be done in the scan converter as well, but if it needs convergence for that mode, that is not how it is done on that set.
If it was, there would only be one convergence and geometry setting. If it is done in the convergence circuit, that is most likely adjustable. I can reset it for less effect. Ant set that accomplishes this with the convergence is beating on the STKs alot harder. I doubt it is done much.
Now there is a workaround. The cheapest way to do it is in the H sweep circuit. If that is the case that is not adjustable. But the wierd stretch mode has a different convergence setting, so if you can get to green geometry and reconverge after you get a more reasonable effect, the results could be quite good, except for the dynamic focus error, but I think that will be mininal.
The main H sweep circuit is not easily adjustable. An if you fix it using the convergence, the YOU are beating on the STKs, possibly beyond design limits.
I am not afraid to modify things, but one has to be reasonable. I wil not spend the time required to modify the H sweep, so convergence is where it happens. I would recommend extending the heatsink and using fans. Also upgrade to the highest in the family of STK 393s. And if we do that, we might need to up the threshold of the current limiting in the main SMPS. If so, that will need a fan or extra heatsinking.
there is one thing about modifications, they must be reliable. It is like getting married in a way. I can do this, I am willing to do this. But that will most likely cost about $350. And subsequently if the STK
393 fails, there will be another bill. I'll cover the STK, but you pay for even more enhanced heatsinking, possibly Peltier junctions.
Really, I worked for an ASC, and when I suggested a modification, even on a COD job, the reponse was "Do you want to take the name off of it and put your name there ?". I agree, that is usually the goal, to restore it to as close as new condition as possible. But that is not what the OP is asking for. I believe that this unit is working to manufacturer's specs right now.
Any modification comes with responsibility. When I found the fix for no sync with defective ICs in E40 series Sylvanias, it was no joke (15-43301 I think) . I saved alot of sets. Manufacturers, I believe, lose their right when they shirk their responsibilities to provide readily avaiable parts, and that means AFTER the warranty period as well.
There is a Panasonic in the shop, circa 2003, needs the DG board. No parts were ever avaibable for this board. Just the whole board, I am told it is NLA. This set is about four years old. And if that nameplate means nothing to them, it means even less to me.
Only the people can speak on this one. Buy sets manufactured by companies that support their product. Give up the instant gratification. Most bang for the buck is supposed to apply to cars, if the TV picute is that important to you, that is almost an OCD.
That is my opinion.
JURB