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2SA872 – 2SA872 PNP Low Frequency Transistor
Can you determine if Datashet 7,8 have the collector or the base at the center pin. Am i correct in assuming “2s” should be in front of those? This package is a TO and the other one has a TO Your name or email address: The a also says “GR 5K”. A previous owner has butchered this thing badly picture attached with all sorts of oddball replacements and beautiful soldering, so I would like to start over.
I would like to replace all of the transistors on the power amp board. Per datasheets available online they are both center collector 2sa http: You want to use the complementary pairs listed on the datasheet.
Discussion in ‘ DIY ‘ started by gort69Jan 11, I really 2sa8872 your taking the time to help me with this. Those two transistors simply have “A” printed on them – I’m assuming they are 2sa Are there any markings that tell the gain of the part that you can read?
As you can tell I’m new to this.
2SA Hitachi Silicon PNP Epitaxial amplifier ChipFind Datasheet Archive |
Since this board has been messed with so much, I pulled the 2sa782 amp from another KR I have that is unmolested, and listed here what is actually installed on the board. Yes, my password is: Share This Page Tweet. Thank you very much for 2s872 help on this! Is a TO bigger than a TO? You have Qe 7,8 as 2sa but on the schematic it says 2sa WB. Are those Qe the drivers? Do you see any gain numbers on any of those parts?
I asked a question about the outputs earlier today. I was wondering if datashest would bring that up. My understanding is that Kenwood and likely others used what they could get their hands on at the time. Yes, 2s There are replacements but you have to be sure if the center is a base or a collector.
Have also attached a scan of the power amp schematic. SoundOfSoundJan 11, Do you already have an account?
Yeah, that’s a reason I I’m looking at the other board. Qe 2sa are your differential pairs. You must log in or sign up to reply here.
I’m also hoping someone can point out which are the differential pairs so that I can order a bunch of them to match them up. Lots of room for those. I can order the caps myself, but need some help with the transistors. No, create an account now. What part is on the messed up board?
2SA – 2SA PNP Low Frequency Transistor
Yea GR it looks like. The a also says “5E C4”.
Curious what you think about my selection on those. I bought a rather hacked KR with blown outputs on the left channel. You need the collector in the center.