2SA872 DATASHEET PDF

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Log in or Sign up. Are those Qe the drivers?

Discussion in ‘ DIY ‘ started by gort69Jan 11, Yes, my password is: I asked a question about the outputs earlier today. No, create an account now. As you can tell I’m new to this. Here are the datasheets for the outputs. Those two transistors simply have “A” printed on them – I’m assuming they are 2sa Yeah, that’s a reason I I’m looking at the other board. Your name or email address: I really appreciate datazheet taking the time to help me with this. 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.

Lots of room for those. Share This Page Tweet. I’m also hoping someone can point out which are the differential pairs so that I can order a bunch of fatasheet to match them up.

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Do you already have an account? Can you determine if Qe 7,8 have the collector dataseet the base at the center pin. The other one has the wrong pin out. Am i correct in assuming “2s” should be in front of those? Have also attached a scan of the power amp dtasheet.

2SA Hitachi Silicon PNP Epitaxial amplifier ChipFind Datasheet Archive |

Qe 2sa are your differential pairs. There are some odd things on your list. You need the collector 2a872 the center. I can order the caps myself, but need some help with the transistors.

What part is on the messed up board? This package is a TO and the other one has a TO You must log in or sign up to reply here. I have spent a fair amount of time searching the forum for subs, but am hoping someone can look over my list and point out errors, make better recommendations, datawheet comment otherwise.

I would like to replace all of the transistors on the power amp board. I don’t feel very confident about my sub for Qe19,20 – there is no datasheet available. Are there any markings that tell the gain of the part that datasheey can read? The a also says “5E C4”.

Datasheet «2SA872»

You have Qe 7,8 as 2sa but on the schematic it says 2sa WB. I’m getting conflicting information about a replacement. Thank you datashet much for any dataasheet on this! The a also says “GR 5K”. On the board I’m working on, Qe7 says a and Qe8 says a and both are very obvious poorly done replacements. My understanding is that Kenwood and likely others used what they could get their hands on at the time.

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You want to use the complementary pairs listed on the datasheet. I was wondering if someone would bring that up. Since this board has been messed with so much, I pulled the power amp from another KR I have that is unmolested, and listed here what is actually installed on the board.

Is a TO bigger than a TO? I bought a rather hacked KR with blown outputs on the left channel. Curious what you think about my selection on those. Yea GR it looks like. Do you see any gain numbers on any of those parts?

Yes, 2s There are replacements but you have to be sure if the center is a base or a collector.

SoundOfSoundJan 11, Per datasheets available online they are both center collector 2sa http: