Hello,
The transistors used in the legacy Lectron sets are made from Germanium, which is completely different from the types made of Silicon we are using nowadays.
If you want a replacement for these Germanium (Ge) transistors, you need to check if they are PNP and also the right type.
For example, the AC125 is a Germanium (A) and a low frequency audio amplifier (C) type.
Please be aware that those transistors are obsolete and the price for new old stock can be quite high.
I don’t have my comparison chart right now but I’ll look it up when returning home from holidays.
These are European types of transistors, so I don’t quite know the American equivalents.
I do have a local firm which has these AC125 transistors in stock, so if you’re interested I can contact them.
Many greetings,
Frank
- This reply was modified 5 years ago by Michael. Reason: Changed font and size styling for easier reading