[Reece]

Nice little set. This is a TRF set and needs a good antenna to work well. About 20' of wire stretched across the room would be enough for a test, if you don't have an outdoor antenna.

The internals of the capacitor boxes are laid out very clearly with regard to color coded wires. I'd take plenty of close-up digital pictures and make drawings of the wiring and remove the boxes with the long wiring attached. Be sure the color coding on the wires still shows up clearly and is not faded so that it could be confusing later on; label wires if needed. The caps may be bedded in tar in these boxes: heating the boxes with a hair dryer or heat gun should release the block. It's not necessary to refill the boxes with any kind of potting material when replacing the caps. There may be reusable terminal borards in there or you can make up pieces of perfboard with copper traces to mount your new caps on and connect the old wires to. Mount the boards back inside the cans maybe with a bit of hot glue. Be sure the terminals can't short to the cans by wrapping the board in some plastic material or fish paper.