Remember, you may want to even out the heater string too, so order a 35C5 audio amplifier tube to replace the 50C5. That gives you the extra 12 volts for one new tube. Also, see the link below regarding souping up your AA5 to see an AA5 with a loopstick at the mixer input. AES also has a large selection of books on radios that can help you experiment with and modify your kit. Only a Digital Voltmeter required, besides common tools like screwdrivers, wire strippers etc.
Coils are pre-wound.
AA5 Shortwave version radio in clear acrylic with optional Vernier Dial for smooth tuning. Here is the standard AM version of the kit in clear acrylic red. Here's our AM Broadcast band kit in blue see-through acrylic. It works beautifully. I'm listening to Christmas music on it right now.