| Valves 41MH - 4-TSP | |||||||
| Valve | BASE | Additional Base Info | Use TV or Radio | Equivalents | Heater Volts | Valve Characteristics |
| 41MH | B5 | RAD | AC/2HL MH41 A30B | 4 | TRIODE AMP | |
| 42MPT | B7 | RAD | 4 | PENTODE | ||
| 45 | UX4 | AMERICAN | RAD | 2A3 | 2.5 | OUTPUT 2W |
| 46 | UX5 | AMERICAN | RAD | VT63 CV2531 | 2.5 | OUTPUT 1.25W |
| 47MG | IO | OCTAL | TV | |||
| 4EJ7 | B9A | TV | 4.2 | PENTODE | ||
| 4THA | B7 | RAD | AC/TH1 TH4B TH4A A36C | 4 | TRIODE/HEXODE F/C | |
| 4-TSP | B7 | RAD | 4 | PENTODE |
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