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Beta Group (Hfe) of replacement transistors
I'm replacing a pair of shorted outputs in an Onkyo TX-SV525 AV
Receiver. The manual states, "Replacements must be from the same beta group (Hfe) as the original type". This has something to do with the devices' gain, I suppose. The originals are marked "Toshiba B1557 O 5H" and "Toshiba D2386 O 5G". MCM Electronics has 2SB1557 and they sub 2SD2386 to 2SD2387. Assuming I properly replace all the other faulty components in the failed channel's output stage, what's likely to happen when I power this unit up with sub's that most likely have different Hfe than the originals? Thanks for any thoughts. |
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