| The Impoverished Radio Experimenter Vol. 4 Build a TRF regen receiver, one tube crystal converter, versatile power supply, slide rule dial and more ! Modern reprint, 5-1/2x8-1/2, 48 pages [an error occurred while processing this directive] |
| The Impoverished Radio Experimenter Vol. 5 Build a superhet receiver, coil winding machine, simple alignment oscillator, IF transformers and more ! Modern reprint, 5-1/2x8-1/2, 48 pages [an error occurred while processing this directive] |
| Telephones and Microphones - How to Make and Use Them Modern reprint, 5-1/2x8-1/2, 80 pages [an error occurred while processing this directive] |