2SC2922 / 2SA1216 hfe rank mismatch - diyAudio
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Old 7th December 2012, 06:39 AM   #1
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Default 2SC2922 / 2SA1216 hfe rank mismatch

I have a JVC A-X9 solid state amplifier which uses 4 pairs of 2SC2525 / 2SC1075 output transistors originally. That some of them are burnt out I plan to replace them with 2SC2922 / 2SC1216 pairs. I can find 2SC2922-83G and 2SC1216-24Y, but hfe raitings of the pairs mismatch (G:90 Y:50). Does it make a problem?
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Old 7th December 2012, 07:06 AM   #2
Mooly is offline Mooly  United Kingdom
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I would doubt its an issue. hfe selection and hfe "ranks" were commonly seen in many Japanese items.

From a practical point you should use a "bulb tester" to limit current. I would also replace the driver transistors as a matter of course as these have a habit of failing intermitently. Also check all the PCB for poor joints.

Also there will be many more modern devices that can be used.
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