Hello, we have the following audio transistors, pair matched, both brand new and used. The used are fully tested before shipping. Not all parts has both new and used, some has only new and some has only used.
mj21193 MJ21194
MJ21195 MJ21196,
mj15024 MJ15025
MJ11032 MJ11033
2N3055 2N2955
MJ15003 MJ15004
TIP147 TIP142
FJL4315 FJL4215
2SA1145 2SC2705
2SC5200 2SC1943
2SC2921 2SA1215
2SC2922 2SA1216
2SC3280 2SA1301
2SC3264 2SA1295
2SA1145 2SC2705
BC550 BC560
2SA1186 2SC2837
B647 D667
New items will be post if there're some.
Pls pm or post in reply for inquiry.
mj21193 MJ21194
MJ21195 MJ21196,
mj15024 MJ15025
MJ11032 MJ11033
2N3055 2N2955
MJ15003 MJ15004
TIP147 TIP142
FJL4315 FJL4215
2SA1145 2SC2705
2SC5200 2SC1943
2SC2921 2SA1215
2SC2922 2SA1216
2SC3280 2SA1301
2SC3264 2SA1295
2SA1145 2SC2705
BC550 BC560
2SA1186 2SC2837
B647 D667
New items will be post if there're some.
Pls pm or post in reply for inquiry.
Last edited:
All transistors are listed here:
Discrete - Audio - Amateurs - Boards | Kits | Components | Modules | Tools
If any problem please feel free to contact me
Discrete - Audio - Amateurs - Boards | Kits | Components | Modules | Tools
If any problem please feel free to contact me
How do we match a pair?
The matching work is used to be done by the supplier. But we had been surfered a lot by their unprofessional. We decided to do the matching by ourself.
To match a transistor accurately (say, 1% for same device and 3% for push-pull), a tracer is necessary. We got a digital tracer with storage function to do this work.
Step 1, measure a group of trace, store it
Step 2: Measure another transistor, store it
Step 3: compare them
Matched pair (FET):
Unmatched:
The matching work is used to be done by the supplier. But we had been surfered a lot by their unprofessional. We decided to do the matching by ourself.
To match a transistor accurately (say, 1% for same device and 3% for push-pull), a tracer is necessary. We got a digital tracer with storage function to do this work.
Step 1, measure a group of trace, store it
An externally hosted image should be here but it was not working when we last tested it.
Step 2: Measure another transistor, store it
An externally hosted image should be here but it was not working when we last tested it.
Step 3: compare them
An externally hosted image should be here but it was not working when we last tested it.
Matched pair (FET):
An externally hosted image should be here but it was not working when we last tested it.
Unmatched:
An externally hosted image should be here but it was not working when we last tested it.
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