So I picked up this late 50's RCA 6-RF-9 at an estate sale for the princely sum of $27: Mahogany cab, AM/FM/Phono, 8" speaker, 5Y3, 6AV6, and an original black plate RCA 6V6 (plus a bunch of radio tubes and stuff). I recapped it, replaced the 6AV6 with a 12AX7, reworked the amp circuit (more like a 5F2), swapped out the RCA phono jack for a 1/4" jack, and now I have an AM/FM/Guitar amp. I added an SS rectifier to bring up the B+ voltage. Sounds great now, and I have a Weber speaker on the way so it should sound even better soon. AM/FM reception is OK, I'll try to align it at some point. So one thing I didn't change yet is the AC power setup. 2-wire, no fuse, LC filters on both legs with the "C"s being "death caps" to chassis. Plus, one leg of the AC is connected to a wire and antenna terminal on the back of the chassis and the power cord is used as a radio antenna. Does anybody have suggestions on what to do with the power? I assume the LC filters are to cut any RF from the mains supply. How important are they? If I add a grounded power cord, any issues with the antenna setup? (which seems super unsafe anyway to have exposed AC on the back of the chassis right by the guitar input jack). What about the heater wiring, which uses the chassis as one leg of the AC? OK to ground the chassis? Thanks in advance!