CurtPalme.com Home Theater Forum

[danielparker]

I have a 9500LC that I purchased a few years (about 4) back.. When I did it came with 5 additional tubes in their housings:

http://cdn.beercellar.com/misc/forums/6.JPG

Three of these (both of the greens and a blue) have burn in.

Two of them, a red and a blue look 10/10:

http://cdn.beercellar.com/misc/forums/7.JPG

When I asked about these at the time, I was told that he (the previous owner) was told they worked perfectly, but when he tried them, they didn't work at all.

I took a look at them tonight, and the anode cap is siliconed on with the HV lead cut:

http://cdn.beercellar.com/misc/forums/5.JPG

How could these have been tested with no anode? I can only assume he didn't have an endless supply of HV cables, so wouldn't have tested and then cut the cable? Why would someone just cut the cable?

Daniel Parker

[gjaky]

There are CRT tester equipments. But knowing some marqees ate tubes without noticeable wear on them (due to the high heater voltage) and looking at the cut HV cable is not very promising for me...

[Ile]

Maybe someone needed only hv-cables end hardwares to other tube or cables were arching and he made sure no one will use those without new cables.

You can swap hv-cables from those burnt tubes, if those still have cables.
http://www.curtpalme.com/HV_Lead_Removal.shtm

[Curt Palme]

Cut HV cables, or purposely damaged electronics is always a sign that a technician somewhere has deemed the item to be defective, and the cut lead indicates that the item is bad, and not to use it.

Now, there's many a time that a 'technician' is wrong, and the tube may be fine, but chances are even if the phosphor is good, the tube may have no emission, it could be shorted, etc. About all you can do is put on a replacement HV lead and try the tube. Even the ones with wear have some value for the LC housing, and esp. the green C element.

[Curt Palme]

Cut HV cables, or purposely damaged electronics is always a sign that a technician somewhere has deemed the item to be defective, and the cut lead indicates that the item is bad, and not to use it.

Now, there's many a time that a 'technician' is wrong, and the tube may be fine, but chances are even if the phosphor is good, the tube may have no emission, it could be shorted, etc. About all you can do is put on a replacement HV lead and try the tube. Even the ones with wear have some value for the LC housing, and esp. the green C element.