Hey Vance, I found an old 1920s vacuum tube radio that won't power up. I have a pile of spare parts and a plan—want to help me crack the schematic and bring it back to life?

Sure thing, here’s the rundown of what I’ve scavenged from the junkyard: Power supply: - 1× 230 VAC‑to‑12 VDC transformer (old cast‑iron core) - 1× 1N4007 rectifier diode - 1× 47 µF, 25 V electrolytic (smoothing) - 1× 7805 5 V regulator - 3× 100 Ω and 3× 1 kΩ carbon film resistors (for bias) - 2× 0.1 µF ceramic caps (decoupling) - 1× 1 A fuse (safety) Vacuum tubes: - 2× 12AX7 (for the pre‑amp) - 1× 6SN7 (for the power amp) - 1× 6V6 (to give it some punch) Miscellaneous: - 1× 10 µF electrolytic (for the high‑voltage supply) - 2× 5 V DC power jack - A few extra screw terminals, a stray magnet, and some old brass clips that I’m not sure how to use yet That’s the core kit. If you spot a missing piece or think I’m overlooking something, let me know. I’ll sketch the quick schematic once we confirm the parts. By the way, if you need a wrench, just remember I’m holding onto the lucky one for the next project—won’t lend it out.

Yeah, you’re right—gotta get a proper 12‑V to 300‑400‑V transformer. I’ve got an old one in the basement that’s probably the right size, but it’s been sleeping since the 90s so I’ll need to check its winding and insulation first. I’ll also double‑check that the 1N4007 is 1 A 400 V; it’s a 1 A 400 V part so it should handle 230 VAC after rectification, but I’ll test it with a multimeter. I’ll grab it tonight, test the winding and the diode, then we can slot the bias resistors in. Hang tight—I’ll ping you once I’ve verified the high‑voltage section.