Greetings and Salutations,
I recently acquired a beautiful Onkyo M200. Unfortunately, it’s in pretty rough shape - the front glass is broken, and the PCBs were tampered with. The PCBs are in very poor condition etc.
I have basically repaired the electronics and confirmed it by replacing the bad components with good ones from one side and bypassing the protection circuit.
I was able to find substitutes for almost everything from KEC Semiconductor and ON Semiconductor, except for the 2SC1941 and its complementary device, the 2SA916. The KSC3503 and its complementary device would have been a good fit, but I haven’t been able to find original ones with the same grading from a reputable distributor. I’m located in Germany, by the way.
The closest transistor I could find was the BF723. The only issue is that there are no graphs for gain linearity, etc., and I don’t have a tool to plot them myself with a curve tracer. Other than that, it looks good, I suppose? HFE should be reasonably consistent due to its intended use, as suggested by the datasheet.
Are there any other transistors from a legitimate source that would be suitable? It doesn’t matter if they’re THT or SMD.
The NEC datasheet suggests the following:
Thanks in advance and best regards from Germany!
I recently acquired a beautiful Onkyo M200. Unfortunately, it’s in pretty rough shape - the front glass is broken, and the PCBs were tampered with. The PCBs are in very poor condition etc.
I have basically repaired the electronics and confirmed it by replacing the bad components with good ones from one side and bypassing the protection circuit.
I was able to find substitutes for almost everything from KEC Semiconductor and ON Semiconductor, except for the 2SC1941 and its complementary device, the 2SA916. The KSC3503 and its complementary device would have been a good fit, but I haven’t been able to find original ones with the same grading from a reputable distributor. I’m located in Germany, by the way.
The closest transistor I could find was the BF723. The only issue is that there are no graphs for gain linearity, etc., and I don’t have a tool to plot them myself with a curve tracer. Other than that, it looks good, I suppose? HFE should be reasonably consistent due to its intended use, as suggested by the datasheet.
Are there any other transistors from a legitimate source that would be suitable? It doesn’t matter if they’re THT or SMD.
The NEC datasheet suggests the following:
- HFE @10V 1mA = min 50
- HFE @10V 10mA = min 90
Thanks in advance and best regards from Germany!
Wait, where can I get them? I could not find them anywhere? even Mouser And DigiKey do not have them with the same grading.
Thank you very much for that!
What could I use once everything is gone? I work on a lot of Japanese audio devices, and these transistors are pretty commonly used...
What could I use once everything is gone? I work on a lot of Japanese audio devices, and these transistors are pretty commonly used...