Quote:
Originally Posted by bandersen
Amazing score! I'm glad it ended up in your hands  It looks like the knobs don't have the white crud that so often plagues these sets.
I'm not sure what you mean ? Why would this TV have a different phosphor ? Doesn't every 7JP4 have the same type of P4 phosphor ? |
Hi Bob,
I recall reading in some old literature that the chemical elements for the P4 phosphor were changed in the 50's. The percentages of some the chemical elements were varied. The older crt's tend to look much yellower. I see this difference in many of the sets I have with original crts. The newer 7JP4 like I bought in 1974 looks more gray/white. I even noticed this on a 5BP4 I bought from the ETF a few years ago.
Ed