• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Collaboration Transistor Substitutions Monster Thread!

Bassblaster

Bassblaster

Super Member
I have seen tons of transistor replacement threads all over the web, well my goal here is to get all the transistors and have them all here in one big post, but i need your guys help, if you people know of any transistors and there replacement post them here and ill add them to the big list! Transistors from all gear of all brands. hopefully this thread will go good and get alot of people and not just fall on its face as most do.
Heres what i have now.

Transistors are organized by name

WARNING: Some of the Substitutions have different pin outs from the originals so be sure where the pins go before you install the new part.

2SA489A —> KSB596Y
2SA493 —> KSA992
2SA497 —> KSA1013
2SA562—> BC327
2SA561 —> KSA733C
2SA606 —> 2N5416
2SA628 —> KSA1013
2SA640 —> KSA992
2SA706 —> KSA1381ESTU
2SA720 —> KSA1013 or KSA1220 *check voltages
2SA722 —> KSA992
2SA725 —> KSA992
2SA726 —> KSA992
2SA733 —> KSA733 or KSA992
2SA747 —> MJ21193G
2SA750 —> KSA992FBU
2SA763 —> KSA992
2SA777 —> KSA1220AYS
2SA839 —> MJE15035 or 2SC1669
2SA847 —> KSA992
2SA850 —> KSA1013 or KSA992
2SA896 —> KSA1381ESTU
2SA914 —> KSA1142, KSA1381
2SA968 —> MJE15033
2SA981 —> MJ21194G
2SA1076 —> 2SA1494
2SA1105 —> 2SA1695

2SB327 —> KSA1220A
2SB507 —> KSA940 or MJE15033G
2SB526 —> MJE15033
2SB527 —> MJE15033 or KSA1220
2SB528 —> 2SA1837
2SB531 —> MJ15016G or MJ21193G
2SB536 —> KSA940, KSA1304Y or MJE15033G < Clarification Needed
2SB537 —> MJE15031G
2SB539 —> MJ21193G
2SB545 —> MJ21193G


2SC458 —> KSC1845
2SC485 —> KSC1845 or KSC2073
2SC497 —> KSC2383
2SC693 —> KSC1845
2SC732 —> KSC1845
2SC789A —> KSD526Y
2SC793 —> MJ21194G
2SC857 —> KSC2310
2SC869 —> KSC2310
2SC870 —> KSC1845
2SC871 —> KSC1845
2SC905 —> KSD1616
2SC945 —> KSC2383 or KSC945
2SC959 —> 2N3440
2SC984 —> KSC2383
2SC1000 —> KSC1845
2SC1124 —> KSC2690
2SC1212 —> KSC2690
2SC1213 —> KSC2383
2SC1222 —> KSC1845
2SC1312 —> KSC1845
2SC1313 —> KSC1845
2SC1318 —> KSC2690
2SC1328 —> KSC1845
2SC1344 —> KSC1845
2SC1345 —> KSC1845
2SC1364 —> KSC2383
2SC1384 —> KSC2690
2SC1416 —> KSC1845
2SC1451 —> KSC3503
2SC1509 —> KSC2690AYS
2SC1515 —> KSC2310
2SC1624 —> MJE15030G
2SC1775 —> KSC1845
2SC2526 —> 2SC3858

2SD287 —> MJ21194G
2SD313 —> KSC2073 or MJE15032G
2SD325 —> KSC2073
2SD371 —> MJ15015G or MJ21194G
2SD381 —> KSC2073
2SD712 —> KSC2073
 
Last edited:
Register to hide this ad
I don't have anything to add other than great idea!! :thumbsup:
MT-200 2SA 1076 and 2SC 2526 replacements is what I'm hoping to see posted here.
 
avionic said:
Sanken 2SA1494 and 2SC3858 from B+D Enterprise or Digikey for the MT-200. I use these in Yamaha M-80/85 amplifiers.
Click to expand...

Awesome, thanks! wow that was quick :thumbsup:, do you know if they ship with mica? Mt-200 mica insulators are not easy to find.
 
Thanks! I read here somewhere that the made in China MT- 200 mica thickness were inconsistent, but I will take what I can get. Thanks again!
 
OK. Seriously. This is why I SUBSCRIBE to Audiokarma. So much really good info. How do you guys do this? This is another of those ConradH capacitor goldmines. Which could quite easily lead to "how do you choose a substitute transistor" tutorial.
Please correct me if I am wrong, if a Bergquist or alternate insulator is not available, reusing an original (as long as it's intact) with a thermal paste, is "passable".
 
This thread is a good idea, but don't forget that you can:-

Simply enter the transistor/semiconductor type number into AK search and up will come hosts of threads/posts where that type number is being discussed potentially in the exact equipment you are working on, and will very likely have the correct substitutes listed.

Remember also.
Sometimes there is a 'good substitute', a 'better substitute' or a 'best substitute' - depending on its exact use and circuit position. In other words, a sub for one piece of gear may not be correct for a different piece of gear using the same device.

OR, alternatively look here:
http://audiokarma.org/forums/index.php?threads/once-more-sansui-transistor-substitutions.583009/

Occasionally a type number comes up which has never had substitutes requested, in that case ask the question here. ;)
 
Last edited:
hybridtech said:
Please correct me if I am wrong, if a Bergquist or alternate insulator is not available, reusing an original (as long as it's intact) with a thermal paste, is "passable".
Click to expand...
It is acceptable to reuse mica. Make sure it is clean and not cracked / broken. Always a good idea to use a meter to check to make sure all three leads are insulated from the heat sink after attaching. I do not think you can reuse other insulators.
 
Hyperion said:
a sub for one piece of gear may not be correct for a different piece of gear using the same device.
Click to expand...

Does it matter if the outputs are for an A/B amp or a very hot running Luxman L-530 deep bias integrated that runs in pure class A for the first fifteen watts?
 
Denten said:
Does it matter if the outputs are for an A/B amp or a very hot running Luxman L-530 deep bias integrated that runs in pure class A for the first fifteen watts?
Click to expand...

You got me there - I have no idea, I am not an expert on subs, I just know this condition can exist with substitution lists.

The example I can quote is for a transistor that had a quoted equivalent of a KSC1845, and in almost all cases this would be fine, but for one parameter. In the particular equipment where this device to be subbed was used, that one parameter was 'under pressure' - and in that case a better sub was a KSC1815.
 
Last edited:
Hyperion said:
You got me there - I have no idea, I am not an expert on subs, I just know this condition can exist with substitution lists.

The example I can quote is for a transistor that had a quoted equivalent of a KSC1845, and in almost all cases this would be fine, but for one parameter. In the particular equipment where this sub was used, that one parameter was 'under pressure' - and in that case a better sub was a KSC1815.
Click to expand...

That is why I have absolutely no confidence in choosing my own replacements. :no:
 
If you post up the type number of the device you want a sub for, there are a few crackerjack substitution experts on here, who can often come up with even a list of subs for the device you quote, let alone just one - getting them to see the post is the trick. :banana:
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom