This is another Swan 117-XC power supply restoration. These are solid performers and used to power many of the Swan rigs like the 250, 350, 500, etc.
Restoration is pretty straightforward... refinishing the cabinet, compounding the front panel, replacing all electrolytic caps, replacing the old "metal-can" style rectifiers, and replacing the 4.7 ohm resistor in the 12v relay supply circuit. Here's a few pics...
This is a Swan 117XC power supply I got from the estate of Ken Stroud AB4RQ. It had been parked for many years, a paper tag on it indicated a problem in 1998. This is required to run the old Swan tube rigs from the 60's like the Swan 250, 350, 500s, etc.
I disassembled it and started by removing and treating rust, repairing a damaged speaker, compounding the front panel, and striping / reapplying the black wrinkle finish. I replaced all electrolytic caps, the 4.7 ohm resistor in the relay keying supply was at 15 ohms, and installed a new ne-2 neon power lamp. After reassembly, she runs like a new supply. It currently awaits restoration of some of the Swan radios I got from Ken's estate.
This is a Swan 117-XC power supply. It produces about 850 vdc for the final amp plate supply, 300 vdc for the hv needed by most of the radio tubes, -100vdc bias, 12 vac for the tube filaments, and has an external speaker & headphone jack. It was in pretty good electrical condition, but needed cosmetic help. I recapped the supply (forgot to take pics), reapplied the wrinkle finish, and compounded the faceplate. The speaker grill was a low grade of stainless that rusted. I tried everything, but couldn't get the surface rust out of the perforations...making it have a overall rusty look. I finally sprayed it with a paint color called "stainless steel", and it turned out pretty good. This supply runs many of the Swan rigs from the 1960's.
