[skyscraper]

Good ol' 89 If that's a 36 in the oscillator socket, you're in for quite an adventure. Good luck, read my thread if you have trouble. There's a huge amount of beginner info there.

Here's pics and schematics:
http://www.philcoradio.com/tech/89evol.htm

EDIT: That looks like a 5 pin socket, so it is a 36 tube. It's one of the first few schematics on the evolution page, you'll have to trace the changes to figure out which one. Interesting that you have a mica cap in the audio section like mine, only the 77 tube schematics that I've seen show it.