Replacement Components
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Many components used in the Sinclair hardware, peripherals, etc. are no longer manufactured. However for most of these components there are modern alternatives. Much research was conducted by DEATH and others on the World of Spectrum forums
Transistors
ZX Spectrum 48k
Component | Replacement | Issue | ||||||
1 | 2 | 3 | 3B | 4 | 5 | 6A | ||
TR1 & TR2
ZTX313 |
BC172 | ? | ? | ? | ? | ? | ? | ? |
BC183 | ? | ? | ? | ? | ? | ? | ? | |
BC238 | ? | ? | ? | ? | ? | ? | ? | |
BC383 | ? | ? | ? | ? | ? | ? | ? | |
BC547 | Y | Y | Y | Y | Y | Y | ||
BC548 | Y | Y | Y | Y | Y | Y | ||
BC549 | Y | Y | Y | Y | Y | Y | ||
MPS 2369 | Y | |||||||
ZTX312 | Y | |||||||
TR3 & TR6
ZTX313 |
BC172 | ? | ? | ? | ? | ? | ? | ? |
BC183 | ? | ? | ? | ? | ? | ? | ? | |
BC238 | ? | ? | ? | ? | ? | ? | ? | |
BC383 | ? | ? | ? | ? | ? | ? | ? | |
MPS 2369 | Y | |||||||
ZTX312 | Y | |||||||
TR4
ZTX650 |
BC487 | ? | ? | ? | ? | ? | ? | ? |
BC489 | ? | ? | ? | ? | ? | ? | ? | |
BC537 | ? | ? | ? | ? | ? | ? | ? | |
BC538 | ? | ? | ? | ? | ? | ? | ? | |
BC737 | ? | ? | ? | ? | ? | ? | ? | |
ZTX651 | Y | Y | Y | Y | Y | Y | ||
TIPP31 | Y | Y | ? | ? | ||||
TR5
ZTX213 |
BC251 | ? | ? | ? | ? | ? | ? | ? |
BC307 | ? | ? | ? | ? | ? | ? | ? | |
BC512 | ? | ? | ? | ? | ? | ? | ? | |
BC557 | ? | ? | ? | ? | ? | ? | ? | |
ZTX750 | Y | Y | Y | Y | Y | Y | ||
TR7
ZTX450 |
ZTX650 | Y | Y | Y | Y | Y | ||
ZTX651 | Y | Y | Y | Y | Y |