Quote:
Originally Posted by Phil Nelson
Hmm, good point. I ran into that issue once when using a rebuilt tube that had the right electronic characteristics but a slightly different bulb profile than the original.
Most of the dimensions look close enough, but now I see that the diameter at the 12KP4A screen face is 7/16" wider than the 12JP4. Of course, the dimensions given in the data sheets are plus-or-minus some fraction of an inch. I'll investigate whether there's enough wiggle room to accommodate it.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html |
Phil,
It was the shape of the face that got me into the problem with the mask. Notice how much more the face of the 12J is curved compared to the 12K.
Chuck