Hello,
I have been reading this and other forums for a while - I have always been interested in vintage TV sets. I also love mechanical TV.
Right now, I am slowly restoring a pilot TV 37.
I have three tubes - but I will not know if they work until I get the units running - I do have the green tube that does work just for testing.
Please excuse me if this has been posted before - but if you know about this TV - then you know finding a good used or dare I say - NOS 3KP4 is next to impossible. BUT I have found a place that says they will rebuild, and re-phosphor a 3KP4.
Here is the site:
http://www.wmicronics.com/rebuilttubes.htm
I have not priced them - If I luck out - perhaps one of my CRTs will work.