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Here are the datasheets for the outputs. I’m getting conflicting information about a replacement. Yeah, that’s a reason I I’m looking at the other board. Are there any markings that tell the gain of the part that you can read?
I was wondering if someone would bring that up. Lots of room for those. Is a TO bigger than a TO? Can you determine if Qe 7,8 have the collector or the base at the center pin.
I would like to replace all of the transistors on the power amp board.
2SA Datasheet(PDF) – Hitachi Semiconductor
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. On the board I’m datasjeet on, Qe7 says a and Qe8 says a and both are very obvious poorly done replacements.
Datssheet 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. You want to use the complementary pairs listed on the datasheet. SoundOfSoundJan 11, There are some odd things on your list.
You have Qe 7,8 as 2sa but on the schematic it says 2sa WB. The other one has the wrong pin out. Yea GR it looks like. Share This Page Tweet. The a also says “GR 5K”. Yes, 2s There are replacements but you have to be sure if the center is a base or a collector. I asked a question about dataasheet outputs earlier today. Am i correct in assuming “2s” should be in front of those? I’m also hoping someone can point out which are dstasheet differential pairs so that I can order a bunch of them to match them up.
I really appreciate your taking the time to help me with this. I bought a rather hacked KR with blown outputs on the left channel. This package is a TO and the other one has a TO The a also says “5E C4”. What part is on the messed up board? My understanding is that Kenwood and likely others used what they could get their hands on at the time. I don’t feel very confident about my sub for Qe19,20 – there is no datasheet available. Curious what you think about my selection on those.
Per datasheets available online they are both center collector 2sa http: Do you already have an account? As you can tell I’m new to this.