I replaced a WG K4900 (19") tube this weekend with a GE A48ACE26X tube and used the WG yoke and rings. It wasn't until after I did the following that I realized I goofed when looking it up (in the CRT Cross Reference & Compatibility Guide). Therefore, I am unsure if it is causing the following or I just have WG K49xx chassis with the same issue (seems too coincidental). Note: The GE tube has 10 pins (9 around and 1 in the area by itself) just like G07 and WG49xx tubes.
Using the original WG K4900 monitor, I tested four total WG49xx chassis. One (1) showed collapse (line running top to bottom in the middle of the screen) while (2) worked. It (2) had a bit of wave and clearly needed a cap kit due to having all original caps, but it still worked.
I swapped the tube as noted above and tested a 3rd (3) chassis and had the same collapse as noted above in (1). This seemed odd, so I tested the above working chassis (2) with the new tube and now it shows the same collapse as (1) and (3). The fourth chassis (4) was not tested on the original tube, but on the new tube is now showing the same collapse as the other three chassis. All of the chassis came from various sources and none were known to work (truly unknown, at least by me).
I am digging around for another WG49xx tube to test these on, but it sounds like the tube is smoking the chassis? Keep in mind, chassis (1) had collapse on the original WG K49xx tube before the tube swap was ever done.
I did confirm all chassis swaps were done correctly, including the DAK wire. Thoughts?
Scott C.
Using the original WG K4900 monitor, I tested four total WG49xx chassis. One (1) showed collapse (line running top to bottom in the middle of the screen) while (2) worked. It (2) had a bit of wave and clearly needed a cap kit due to having all original caps, but it still worked.
I swapped the tube as noted above and tested a 3rd (3) chassis and had the same collapse as noted above in (1). This seemed odd, so I tested the above working chassis (2) with the new tube and now it shows the same collapse as (1) and (3). The fourth chassis (4) was not tested on the original tube, but on the new tube is now showing the same collapse as the other three chassis. All of the chassis came from various sources and none were known to work (truly unknown, at least by me).
I am digging around for another WG49xx tube to test these on, but it sounds like the tube is smoking the chassis? Keep in mind, chassis (1) had collapse on the original WG K49xx tube before the tube swap was ever done.
I did confirm all chassis swaps were done correctly, including the DAK wire. Thoughts?
Scott C.
