Notes
- How did an all-transistor heterodyne VFO solve six-meter
- UK Vintage Radio: repair discussions
- Radiomuseum: identify antique radio models
- What did a complete illustrated amateur radio handbook look
- Steve's Antique Technology: vintage service-manual knowledge
- Where can I find an original reference for SCR-194 or
- What do coils, filters and tuned radio circuits actually do?
- How did old radios run without huge B-batteries?
- How did radio builders improve unreliable battery
- How did people build a drum-shaped speaker for an antique
- How did people modify the tuning capacitor in an old
- How did people turn a regular radio into a shortwave