Re: Transistor types in Bi-Pak AL60 modules?
ZTX-prefix transistors are still being made. Ferranti's transistor/diode arm became Zetex and has since been bought out by Diodes Inc. Their devices were surprisingly capable, high current capability and high gain in small packages.
Though I think all current produce are SMT
Bi-pre-pak bought spec failure parts and their cases had odd markings if any at all. To replace a device you need to trace out the circuitry and reverse engineer it enough to decide what device ratings are needed.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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