The R-392 receiver contains 25 tubes of six types. The following table shows the function and type of each tube, the total number of each type, and number of each type in the running spares kit.
| ID | Function | 26A6 | 26A7/GT | 26C6 | 26D6 | 12AU7 | 6AJ5 |
| V201 | 1st RF Amp | 26A6 | |||||
| V202 | 2nd RF Amp | 26A6 | |||||
| V203 | 1st Mixer | 26C6 | |||||
| V204 | 2nd Mixer | 26C6 | |||||
| V401 | 1st Xtal Osc | 6AJ5 | |||||
| V402 | 2nd Xtal Osc | 6AJ5 | |||||
| V501 | 1st IF Amp | 26A6 | |||||
| V502 | 2nd IF Amp | 26A6 | |||||
| V503 | 3rd IF Amp | 26A6 | |||||
| V504 | 4th IF Amp | 26A6 | |||||
| V505 | 5th IF Amp | 26A6 | |||||
| V506 | 6th IF Amp | 26A6 | |||||
| V601A V601B |
IF Cath. Foll. 1st RF AGC Rect. |
12AU7 | |||||
| V602A V602B |
RF & IF AGC Rect. Squelch Rect. |
12AU7 | |||||
| V603A V603B |
Detector Noise Limiter |
12AU7 | |||||
| V604 | BFO | 26A6 | |||||
| V605 | Squelch Control | 6AJ5 | |||||
| V606 | 1st AF Amp | 6AJ5 | |||||
| V607 | Phase Inverter | 6AJ5 | |||||
| V608A V608B |
2nd AF Amp | 26A7/GT | 6AJ5 | ||||
| V609 | AGC IF Amp | 26A6 | |||||
| V701 | Multivibrator | 12AU7 | |||||
| V702 | 200 KC Xtal Osc | 26A6 | |||||
| V703A V703B |
Harmonic Amp Distorter |
12AU7 | |||||
| V801 | VFO-Mixer | 26D6 | |||||
| Total | 11 | 1 | 2 | 1 | 5 | 5 | |
| Spares | 4 | 2 | 2 | 1 | 2 | 10 | |
| 26A6 | 26A7/GT | 26C6 | 26D6 | 12AU7 | 6AJ5 |
Besides tubes, the running spares kit also contains:
