TR-1D (Rev. 2)
| Brand | Heathkit |
| Manufacturer | Heath Company, Daystrom, Incorporated |
| Function | Tape Machine (Kit) |
| Produced | 1959 |
| Country | United States |
| Signal Path | Analog Hardware |
| Weight | 33lbs (Shipped) |
| Frequency Response | 7.5IPS: 30Hz-12kHz ±2.5dB, 3.75IPS: 30Hz-6.5kHz ±2.5dB |
| Speeds (IPS) | 3.75/7.5 |
| Reel Capacity | ≤7" |
| Wow & Flutter | 0.3% |
| THD | 1% |
| SNR | 55dB |
| Equalization | NARTB |
| MSRP (1959) | $159.95 |
| Channels | 2 Channel |
| Notes | TR-1D with improvements to frequency response. |