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looks like the adams family moved into the cabinet.
Pretty sure its a series string set, so be careful.
I would start by pulling the chassis, use some compressed air to blow out most of the dust, then use q tips and your fav solvent to clean the rest.
after that you can asses how to tackle the recap (above board or pull the board).
Since its your 1st one, I would recommend going with above board j hook or pig tail, so as not to disturb the wiring.
After a basic recap of all the papers, I would check the filters, they maybe ok if so you can try a slow power up with the HOT and VOT tubes pulled out of the sockets, check the filter cans for heat and watch the input current on the ac line. I like to start out slow, maybe 10-20vac and check the b+ if each B+ leg is looking good, then go up to 40vac and keep an eye on it. again watching for heat/current on all the filter caps and B+ rails.
Dont go much over 60vac since with out the HOT there will be no load on the B+ and it can go too high.
you can also just check the resistance at the B+ (power off of course) to look for shorts. Just a WAG but I would think 10k or more. If its a lot less then I would suspect a short (it should rise some as the filter cap charges from the current in the ohm meter).
I just went thru this with another set, one of the lower B+ legs was 240 ohms to ground. It had taken out a big dropping resistor. Traced the short by disconnectig the B+ until I found where the short was (the B+ daisy chained around, so you could unhook a section and see if the resistance popped up, if finally did, turned out to be a shorted disck bypass cap).
anyway if your B+ resistance checks ok, and the filter caps dont heat up at 60vac line voltage, and the current was low at the line (no other shorts), then I would let everything cool down (all the tubes since they would be warmed at athe 60vac) plug in the HOT and VOT, and do another power up. This time go right to 115vac relatively quickly (seconds) keep an eye open for filaments and monitor the the B+ if you can.
Series string stuff scares me and come to think of it , the other tubes prob will not be warmed up since you pulled the HOT and VOT, but the B+ should still be there during the testing phase since I am sure it just uses a SS doubler.
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