penmarker Posted November 6, 2017 Report Share Posted November 6, 2017 Is it possible to replace MPSW with MPSA? Quote Link to comment Share on other sites More sharing options...
Pars Posted November 6, 2017 Report Share Posted November 6, 2017 You need the MPSW for the outputs, which is 8 per board. The MPSA will work for the others. Do the SMD version. Quote Link to comment Share on other sites More sharing options...
Pars Posted November 28, 2017 Report Share Posted November 28, 2017 JFETs... anyone look at ZVP3310 and ZVN3310 as possible J74/K170 replacements? Quote Link to comment Share on other sites More sharing options...
Craig Sawyers Posted November 28, 2017 Report Share Posted November 28, 2017 They are MOSFET's, whereas J40/K170 are low noise JFET's. Why not just go for LSK74/LSJ170? Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 28, 2017 Report Share Posted November 28, 2017 Indeed or LSJ689/LSK489.Ā Quote Link to comment Share on other sites More sharing options...
Pars Posted November 28, 2017 Report Share Posted November 28, 2017 I had just run across them on diyaudio and hadnāt looked at them closely.Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Ariamella Posted December 5, 2017 Report Share Posted December 5, 2017 (edited) I was wondering about the transistors used on one of the older versions of the susy dynahi boards being obsolete, and after searching online I think I've found replacements for all of them that seem to be drop in. I'm just wondering if these are fine or if I need to find something else or try and source NOS or used parts. 2SA1358/2SC3421: KSA1220AYS/KSC2690AYS 2SA1145/2SC2705: MMBT5551/MMBT5401LT1G 2SA1349/2SC3381: matched pairs of KSA992/KSC1845 Matched pairs of 2SJ74/2SK170: matched pairs of LSJ689/LSK489 or LSK74/LSJ170 (both seem to be rare/expensive!!) Edited December 6, 2017 by Ariamella Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted December 5, 2017 Report Share Posted December 5, 2017 Mmbt are surface mount so no you have to check the pin outs for the rest Quote Link to comment Share on other sites More sharing options...
Ariamella Posted December 5, 2017 Report Share Posted December 5, 2017 (edited) Do you have any other suggestions for 2SA1145/2SC2705 replacements? EDIT: Just checked the pin outs for everything else and they're a match! Edited December 5, 2017 by Ariamella Quote Link to comment Share on other sites More sharing options...
justin Posted December 6, 2017 Report Share Posted December 6, 2017 (edited) 2sa1201 / 2sc2881 is what i use..you could probably stand them up in TO-92Ā holes just watch the power Edited December 6, 2017 by justin Quote Link to comment Share on other sites More sharing options...
Ariamella Posted December 6, 2017 Report Share Posted December 6, 2017 5 hours ago, justin said: 2sa1201 / 2sc2881 is what i use..you could probably stand them up in TO-92Ā holes just watch the power They appear to be discontinued, sadly enough. Urg getting through-hole sand is incredibly difficult it seems... Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted December 6, 2017 Report Share Posted December 6, 2017 even the ksa992/ksc1845, one of them is on backorder till February and i'm going to need them. Quote Link to comment Share on other sites More sharing options...
PretentiousFood Posted December 6, 2017 Report Share Posted December 6, 2017 I think I have about 100 of each (ksa992/c1845) that I'll never use if anyone needs. Can check tonight.Ā 1 Quote Link to comment Share on other sites More sharing options...
Ariamella Posted December 6, 2017 Report Share Posted December 6, 2017 (edited) 1 hour ago, PretentiousFood said: I think I have about 100 of each (ksa992/c1845) that I'll never use if anyone needs. Can check tonight.Ā What grade are they? I'd love some if you can spare them! Edited December 6, 2017 by Ariamella Quote Link to comment Share on other sites More sharing options...
PretentiousFood Posted December 6, 2017 Report Share Posted December 6, 2017 Mouser's finest! I'm not sure about the hfe grade as I can't find the receipt. The package says FCE. FCE is not an hfe grade, but E is the highestĀ and sounds like something I would buy. Shoot me a PM if you'd like. Quote Link to comment Share on other sites More sharing options...
Ariamella Posted December 7, 2017 Report Share Posted December 7, 2017 3 minutes ago, PretentiousFood said: Mouser's finest! I'm not sure about the hfe grade as I can't find the receipt. The package says FCE. FCE is not an hfe grade, but E is the highestĀ and sounds like something I would buy. Shoot me a PM if you'd like. This is the hFE chart on the datasheet of the KSA992 (and should be identical to the grading system on the KSC1845). @kevin gilmore, do the 2SA1145/2SC2705 on the ss dynahi boards I have need to be matched? Quote Link to comment Share on other sites More sharing options...
Pars Posted December 7, 2017 Report Share Posted December 7, 2017 Matching never hurts... not sure that they need to be though.Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Ariamella Posted December 7, 2017 Report Share Posted December 7, 2017 14 hours ago, Pars said: Matching never hurts... not sure that they need to be though. Sent from my iPhone using Tapatalk I'm pretty certain they don't but I want to ask just in case! Quote Link to comment Share on other sites More sharing options...
jose Posted December 10, 2017 Report Share Posted December 10, 2017 Can I replace the OPA134PA in the GRLV with a DVR134PA? Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted December 10, 2017 Report Share Posted December 10, 2017 definitely not. 1 Quote Link to comment Share on other sites More sharing options...
jose Posted December 10, 2017 Report Share Posted December 10, 2017 Thanks Dr. Gilmore ! Quote Link to comment Share on other sites More sharing options...
ti5002000 Posted December 13, 2017 Report Share Posted December 13, 2017 Guys for the 100uf Electrolytic in the ss dynalo what would be the best capacitor to use in that position?Both in technical and musical terms combined?or doesnĀ“t that matter at all? I saw some of us use nichicon ufg,ukz but i want to know if there are different opinions. Thanks Quote Link to comment Share on other sites More sharing options...
Pars Posted December 13, 2017 Report Share Posted December 13, 2017 I personally like Panasonic... FM or FR. If you want to go semi foo foo, use Elma Silmic II.Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
jose Posted December 13, 2017 Report Share Posted December 13, 2017 I like Nichi KW... but really, you can put anyone Quote Link to comment Share on other sites More sharing options...
ti5002000 Posted December 13, 2017 Report Share Posted December 13, 2017 28 minutes ago, Pars said: I personally like Panasonic... FM or FR. If you want to go semi foo foo, use Elma Silmic II. Sent from my iPhone using Tapatalk What is semi foo foo in this case Pars?Ā 6 minutes ago, jose said: I like Nichi KW... but really, you can put anyone Yes i know i can use anyone but was just wondering what teh guys thought was best both in musical and technical terms. I was thinking in use nichi ukz. Thanks Jose Quote Link to comment Share on other sites More sharing options...
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