14rp4 substitute

[timmy]

So just putting the resistor across the heater will enable the 14atp4 tube to work. Now I'll have to double check to make certain that the measurements are really close or the same. Well it looks like the 12atp4 overall length is around 3/4 of an inch smaller ,bulb diagonal is the same , screen is 12 1/6 x 9 1/2 as opposed to the the 12rp4 is 12 1/8 x 9 5/8 . How does this look, slight mod maybe to fit the same as the other, what would you decide, chance it ? It is very close.