same CRT pin system ?

[berniedd]

I have come across a few instances where the only problem in 14-inch sets is a weak CRT. I have access to many 14-inch sets with defects in the main board. I would like to swap these weak CRTs with the good CRTs from the bad sets. The pin system in all these tubes look alike to me, even if the tube types and manufacturers are not the same. Are you guys aware of any pin system incompatibilities here? Otherwise, it seems a simple matter to transplant the tubes with yoke and correction magnets undisturbed, into the good sets with weak CRTs. I know that the swap may not be that feasible because of differences between yokes, horiz and vert voltages, etc but I'm willing to try my luck.

[torbjorn]

According to my experience, there are very seldom pin incompatibilities as far as the CRTs use the same kind of base.
However, the heater voltage might be different (either 6,3 V or 12,6 V).
But the deflection yokes (and degaussing coils) are definitively NOT standardized. In most cases, one turns out with "transplanting" the deflection yoke anyway.
If you have access to a RCL meter, then measure the inductance of at least the horizontal coils of both yokes. If those are within ±20 % of each other, then it might be worth a try to re-use the yoke. But don't throw the bad CRT with yoke away until you have tested the set!
The vertical coils are more standardized as nearly all sets use similar vertical deflection circuitry. The only problem might be deflection coils from computer monitors designed for a wide range of vertical frequencies.

[Guest]

Thanks for the input.