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I really appreciate your taking the time to help me with this. You want to use the complementary pairs listed on the datasheet. Yes, my dahasheet is: I bought a rather hacked KR with blown outputs on the left channel.
Curious what you think about my selection on those. 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, or comment otherwise. What part is on the messed up board?
2SA 데이터시트(PDF) – Hitachi Semiconductor
I would like to replace all of the transistors on the power amp board. Do you see any gain numbers on any of those parts?
Qe 2sa are your differential pairs. Those two transistors simply have “A” printed on them – I’m assuming they are 2sa The a also says “5E C4”.
Are those Qe the drivers? You must log in or sign up to datasneet here. I asked a question about the outputs earlier today.
This package is a TO and datasheer other one has a TO Am i correct in assuming “2s” should be in front of those? The a also says “GR 5K”. You need the collector in the center. Can you determine if Qe 7,8 have the collector or the base at the center pin. I’m also hoping someone can point out which are the differential pairs so that I can order a bunch datxsheet them to match them up.
Do you already have 2xa872 account? There are some odd things on your list. 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.
I was wondering if someone would bring that up. Discussion in ‘ DIY ‘ started by gort69Jan 11, I don’t feel very confident about my sub for Qe19,20 – there is no datasheet available. Log in or Sign up. My understanding is that Kenwood and likely others used what they could get their hands on at the time. I can order the caps myself, but need some help with the transistors.
(PDF) A872 Datasheet download
No, create an account now. The other one has the wrong pin out.
On the board I’m working on, Qe7 says a and Qe8 says a and both are very obvious poorly done replacements. SoundOfSoundJan 11, Lots of room for those.
2SA872 Datasheet, Equivalent, Cross Reference Search
I’m getting conflicting information about a replacement. Are there any markings that tell datashdet gain of the part that you can read? As you can tell I’m new to this. Yes, 2s There are replacements but you have to be sure if the center is a base or a collector. 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.
2SAA, BG-ELECTRONICS 2SAA, 2SA, AA, A
Is a TO bigger than a TO? Yea GR it looks like. Share This Page Tweet. Have also attached a scan of the power amp schematic. You have Qe 7,8 as 2sa but on the schematic it says 2sa WB.