19AP4 Needed

[GaryK]

Originally Posted by cwmoser

I read somewhere that these old metal cone CRTs were not that bright anyway.
Something about that Aluminum coatings had not been discovered for CRTs
when they were produced. Read also that some rebuilt 16EP4s, 16GP4s, and
19AP4's were rebuilt with Aluminum coatings making it a much brighter tube.

I have 3 Porthole TVs. The 16EP4 and 19AP4 Zenith Porthole TV's I have
are dim but once warmed up is still viewable. My 16AP4 Rockwell Porthole TV
is much brighter but the contrast is not good. I have obtained a NOS 16AP4
that I have been meaning to install but have put off.

Actually when I put the ION magnet back on the tube I put it back exactly as it was positioned on the tube originally so I ASS-umed the tube was extremely dim. Bob Anderson reminded me to try rotating the magnet and presto I got a watchable picture. The tube is still weak but the picture is watchable. I wish I could buy the one on eBay but for now I will have to pass as in just recently reviewing my finances as a retiree I could not squeeze that into my tight budget. None the less that price is very good. If I could afford it right now I would already have that tube. *alas*