Sansui transistor substitution collection Hi, I've been busy figuring out transistor substitutions for my AU20K. While at it I also went through BA-2000 and AU-717 service manuals to find other transistors used originally in these things and searched the forum. The info is scattered in many many threads, maybe there already is a collection of these somewhere but I didn't find it. Meanwhile I have found many more references for other Sansui model's transistors and suitable substitutions in the forum. They are also listed below. If there was any doubt in the discussion about suitability I didn't add them to the list. Here is the list I gathered from AK Exclusively Sansui -section. So, its not an AU20K list but rather a general Sansui list. If you spot an error please point it out, I'll update the list. Also if you know better or more suitable substitutions or transistors which are missing from this list please let us know. All additional info like if the pin order differs from original, case type, ideal usage etc. is welcome. If there is more than one Substitution it means there is more than one option. Ie. somebody on this forum has suggested or even used these types. Note: the suffixes might be suspect on some of these so double check from the specsheet what they mean. These transistors are all something that has been suggested by reputable forum users but frankly I don't know what most of the suffixes mean or if they are the optimal for the use. Please recheck before using and use at your own risk. Note 2: complementary pairs have not been marked. If you need them in pairs google for the datasheet or search Mouser etc. vendor sites for the the substitute and you will find the datasheet. It usually says what the correct complementary pair is. Original ---- Substitution(s) 2SA561 --- KSA733C (C-suffix= collector center) 2SA562 --- BC327 2SA606/2SC959 --- NTE129MCP (Complementary pair product #) 2SA706 --- KSA1381ESTU, BD136 2SA726 --- KSA992FTA/-FBU, BC560 2SA733 --- KSA733C (C= collector center) 2SA745 --- MJ15004G, upgrade: MJ21193 2SA747 --- MJ21193G (for example AU-9900/11000 output) 2SA750 --- KSA992FBU 2SA818 --- KSA1381 (pin order!), KSA1142, (2SA0914?) 2SA839 --- MJE15035, 2SC1669 2SA847 --- KSA992 2SA850 --- KSA1013, KSA992 2SA896 --- KSA1381ESTU (pin order!) 2SA899 --- KSA1142, KSA1220AYS, KSA1381 2SA908 --- MJ21193G, MJ21195G (for example AU-20K output) 2SA914 --- KSA1142, KSA1381 2SA917 --- 2N5400 (pin order!) 2SA939 --- KSA1381, KSA1220AY 2SA958 --- ?? 2SA968 --- MJE15033 2SA981 -> MJ21193G and 2sc2261 -> MJ21194G 2SA1105 --- 2SA1695 2SA1106 --- 2SA1695 (avail. fr. Digikey), NJW1302G 2SB327 --- KSA1220A 2SB507 --- MJE15033G 2SB507(E,F) --- KSA1010Y 2SB526 --- MJE15033 2SB527 --- MJE15033, KSA1220 2SB528 --- 2SA1837 (TO220, fully insulated case) 2SB536 --- KSA1304Y, MJE15033G 2SB537 --- MJE15031G 2SB545(A) --- MJ21193G 2SC458 --- 2SC2240, 2SC1345 2SC735 --- BC337 2SC871 --- 2SC2240, KSC1845, or even BC549C or BC550C (pin out differences!) 2SC945 --- KSC945C (C= collector center) 2SC983 --- KSC1845 2SC1116 --- MJ21194G (for example AU-9900/11000 output) 2SC1124 --- KSC3503DSTU (pin order!) 2SC1313 --- KSC1845FTA (Must install them backwards of original 2SC1313 which is BCE the KSC1845FTA is ECB.) 2SC1364 --- KSC945C (best if used on protection board), KSC2690 (for more demanding use) 2SC1400 --- KSC1845 2SC1402 --- MJ21194 2SC1403A --- MJ15003G, upgrade MJ21194 2SC1585 --- MJ21194G, MJ21196G (for example AU-20K output) 2SC1628 --- KSC3503 (pin order!), (2SC1953?) 2SC1669 --- MJE15034 2SC1708 --- KSC1845 2SC1735 --- KSC2383, KSC1845 2SC1811 --- KSC3503ESTU 2SC1904 --- KSC3503, KSC2690AY 2SC1951 --- ZTX694B 2SC1953 --- KSC2682, KSC3503 2SC959/2SA606 --- NTE129MCP (Complementary pair product #) 2SC1983 --- TIP112F or KSD1273Q 2SC2071 --- KSC3503, KSC2690AY 2SC2238 --- MJE15032 2SC2261 -> MJ21194G 2SC2580 --- 2SC4468 2SC2581 --- 2SC4468 (avail. fr. Digikey), NJW3281G 2SD188(A) --- MJ21194G 2SD247 --- MJ15003G 2SD313(E,F) --- KSC2334Y 2SD356 --- MJE15032 2SD357 --- KSC2690A, KSC2073 2SD381 --- KSC3296Y, MJE15032 2SD382 --- MJE15030G, MJE15032 ------------------------ Here is some diode and zener subs I've seen mentioned while collecting transistors: Diodes/rectifiers: 10D1 --- 1N5392, 1N5393 10D2 --- 1N5392, 1N5393 30D2 --- 1N5402G 1S1588 --- 1S2473, 1N4148 1S2473 ---- 1N4148, 1N4149 VD1212 --- 2pcs of 1N4148 connected in series 1S1850 --- MUR1620CTG (TO220) - or use 1N5393G (200V 1.5A) or 2A03 (200V/2A) to make your own Common Cathode -diode pack 1S1850R --- MUR1620CTRG (TO220) - or use 1N5393G (200V 1.5A) or 2A03 (200V/2A) to make your own Common Anode -diode pack Zeners EQB01-22 --- BZV85-C22 or 1N4748A RD-13A --- TZX13A-TR RD-15E --- ??? Maybe 1N5245BTR, comments? RD-22E --- ??? Maybe 1N5251BTR, Comments? I've noticed I myself have difficulty sometimes finding this thread so here are some search terms: substitution, substitutions, subs, substitute.