Site MenuCommodore 64 Cables Capacitors Chips Connectors Fittings, screws etc Heatsinks, Modifications Keyboard - Breadbin Keyboard - C64C Misc components Peripherals Shielding Voltage Regulators Sinclair ZX Spectrum Cables Capacitors Chips Connectors Diodes Fittings, screws etc Keyboard Parts Misc Modifications Motherboards Other Components Peripherals Transistors Spectrum 128 Cables Capacitors Chips Connectors Fittings, screws etc Keyboard Parts Modifications Sinclair ZX81 Components Connectors Fittings mods Peripherals 1541 Disk Drive Capacitors Chips Commodore C16 / Plus4 Capacitors Chips Plus 4 Connectors Commodore 128 Capacitors Chips Heatsinks VIC 20 Cables Capacitors Chips Connectors etc Screws etc Tools etc Cleaning Hand tools Misc Repair Products Protection & Storage Soldering Sockets Chip Sockets Peripheral PCB connectors Joysticks Parts Zipstiks Other Items Heatsinks Troubleshooting Info Special Orders Shopping Tools View Shopping Cart Check Order Status Other Pages Postage Cookies Contact
ZX Spectrum Transistors
Some of the transistors originally used in the Spectrum are now obsolete - listed below are some suitable replacements.
Click on the product thumbnail for an enlarged view.
A general purpose NPN transistor that can be used to make an alternative version of composite video mod on the Spectrum. Using a transistor instead of a simple wire or capacitor provides a stronger signal, usually giving a brighter picture. It also buffers the Spectrum's video circuitry so much of the load is taken by this transistor. However, it may not be compatible with modern LCD TVs.
Transistor video mod connections:
Note: Alternatively, two BC549s can be used to replace TR1 and TR2 to give a brighter picture when the composite mod is done uisng a capacitor (though they must be fitted rotated 180' compared to the silk screen legend). Please see this article for details.
A cheaper replacement for the obsolete ZTX313 (has same pin-out / case orientation and approx same spec)