Whoops. I thought it was a Philharmonic too at first. But with the separate amp and tuner, It's a Custom Electra IV.
You can get the owners and service manuals here.......
http://www.fisherconsoles.com/custom electra IV.html
All of the tubes should be fairly easy to find. Check with Jim McShane (google him). He tests ALL of the tubes he has to a level that isn't seen anywhere else. And his prices are decent too. Get the Russian 6p14ev for the outputs(replace the 6bq5/el84/7189) Good tubes and sound very nice.
the 7247 is a 12dw7. the 12ax7 replaced it the next year in the amps and is a preferred sub for the 12dw7. Easier to find the 12ax7 too. The 6dt8 for 6AQ8 sub above is good. I've got one(6dt8) in my '64 CE VII and it works fine.
old stock GE/rca/sylvania/raytheon 6AU6, 6BA6,6BE6 are fine. They are the RF and IF tubes in the tuner. the 6eu7 is gonna be a pricy one. Sovtek 6eu7 @
www.thetubestore.com is cheapest new I could find.
I have this phobia on JJ tubes. Old Stock or Sovtek, and Electroharmonix (EH) are good. Chinese tubes are hit or miss.
All total about $150. for inexpensive tubes. Which in the greater scheme of things isn't bad.
You CAN get good sound from this without Mullard or Tele's. (Super Expensive). Start with domestic and russian tubes to get a baseline and if you feel inclined to get Tele's and Mullards, then start saving your money. Only one of my FISHER consoles /receivers has all TELE's and Mullards. I can't tell the difference between it and any of the others. This hobby gets expensive fast. start out slow, and inexpensive, and work your way up if you wallet (and the wife) will allow.
If it hasn't been worked on internally, it will need at least replacement capacitors, and have the resistors checked for out of spec. Put your city state in your profile and it'll show up on your posts. If you're lucky you might have someone closeby to look it over and help you with working on it, or give you some over the shoulder help.
Larry