quantumtangles
- Dec 19, 2012
- 153
- Joined
- Dec 19, 2012
- Messages
- 153
Populating the board of a cool AM radio kit today ebayed from a University in Thailand. Pleased with it but one of the transistors looked damaged and when I handled it to move the pins apart, the emitter almost fell off, but it is plainly and terminally defunct (metal fatigue loss of tensile strength just before a pin comes away in your hand).
It is one of three CS9013 (NPN) transistors working alongside two CS9012 (PNP) transistors and further up the board there are three 2SC3194 NPNs.
I ask myself whether I can plant any general purpose NPN in its place, or whether I should replace all three of the CS9013 NPNs. Then I think maybe I should also replace the CS9012 PNPs as well because they must be working in tandem with the CS9013 NPNs.
Its a nice little kit, had for the price of a couple of coffees at Starbucks and I would love to fire it up with a 6v battery (or maybe a 9v battery and a voltage regulator.
Should I go berserk and replace all the paired 9012/9013 transistors or can I get away with planting a general purpose NPN transistor in the spot where the defunct CS9013 would have gone?
Or should I stop asking stupid questions and just experiment with general purpose transistors from my parts bin
Thanks in advance for any responses
Edit: Sorry there is only one CS9012 and three CS9013s
It is one of three CS9013 (NPN) transistors working alongside two CS9012 (PNP) transistors and further up the board there are three 2SC3194 NPNs.
I ask myself whether I can plant any general purpose NPN in its place, or whether I should replace all three of the CS9013 NPNs. Then I think maybe I should also replace the CS9012 PNPs as well because they must be working in tandem with the CS9013 NPNs.
Its a nice little kit, had for the price of a couple of coffees at Starbucks and I would love to fire it up with a 6v battery (or maybe a 9v battery and a voltage regulator.
Should I go berserk and replace all the paired 9012/9013 transistors or can I get away with planting a general purpose NPN transistor in the spot where the defunct CS9013 would have gone?
Or should I stop asking stupid questions and just experiment with general purpose transistors from my parts bin
Thanks in advance for any responses
Edit: Sorry there is only one CS9012 and three CS9013s
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