FM-3
| Brand | Heathkit |
| Manufacturer | Heath Company, Daystrom, Incorporated |
| Function | Radio Tuner (Kit) |
| Produced | 1955 |
| Country | United States |
| Signal Path | Analog Hardware |
| Dimensions | 32 × 9.1 × 13.7 cm (W × H × D) |
| Weight | 5lbs |
| Power | 105-125VAC, 50/60Hz 35W |
| Tuning Range | 88MHz-108MHz |
| IF Frequency | 10.7MHz |
| Output Voltage (Fixed) | 0.12V (30% Modulation at 100µV Input) |
| Output Impedance (Fixed) | 47kΩ |
| Output Voltage (Variable) | 1.5V |
| Output Impedance (Variable) | 15kΩ |
| Tube Complement | 6X4, 6BQ7A, 6U8, 6CB6, 6AL5, 6C4 |
| MSRP (1955) | $24.50 |
| Channels | 1 Channel |