I think the resolution is pretty good, although I've never put a test pattern on it. Anyone that has ever been here is usually amazed at seeing it play... especially when I tell them it's nearly 40 years old. Last year, I had cable TV connected to my house, and the cable tech raised an eyebrow when he came in the house and saw what the cable would be plugged into. He really had his doubts... until he plugged it in!
Since it was mentioned, I thought I'd put a test pattern on it this afternoon. But, my digital camera just took a dump, and that's kinda given me the red-ass! Talk about true reds!
I still have two 21FBP's in the garage that have been rebuilt and are waiting to go into sets. I think one of them is going into my black CTC11. It makes a good sharp picture, but the blue gun is pretty much dead. The other rebuilt tube will be going into a CTC15 once i fix its flyback problem.
Once I swap out CRT's in the 11, the old one will go to VDC for rebuild so that I will always have at least one good tube on hand for future use.
I'm glad you guys like the photos. Hopefully this old girl will outlast anything I could buy in the store today!