| Type | Substitutes | Base Diagram |
|---|---|---|
| E424 | TE24, 70504, NU41, 41MH, Dn254, Dn284, I253, ND4_Orion, NU4, REN904, T425, TL425, VT1_Oxytron, W308, WG42 | |
| Web References | E424 (Philips) @ Franks Electron Tubes? E424 (Philips) @ Franks Electron Tubes? E424 @ Radiomuseum | |