Thursday, February 25, 2021

VINTAGE TRANSISTOR replacement

 Vintage HiFi Transistor Replacement Table


Type            Replacement(s)                                  Failure notes

--------------- ----------------------------------------------- ------------------------------

2SA706          KSA1220 or 2SA1837 or KSA1837                   Gain deteriorates with age

2SA720          KSA1013

2SA725          KSA992 or BC327                                 Shot noise

2SA726          KSA992F or KSA992E or BC327                     Shot noise

2SA798          (2x) BC560B or (2x) KSA992

2SA809          KSA1381                                         Poor heat dissipation


2SC458          2SC2240 or KSC1845F or KSC1845E                 Leakage, noise, static

2SC631          KSC1845 (but test for hfe 350+)                 Prone to failure or noise

2SC632          KSC1845 (but test for hfe 350+)                 Prone to failure or noise

2SC871          KSC1845F or BC550C                              Leakage, noise, static

2SC1000         KSC1815Y                                        Leakage, noise, static

2SC1124         KSC2690 or 2SC4793 or KSC4793                   Gain deteriorates with age

2SC1312         2SC2240 or KSC1845 or BC337

2SC1313         2SC2240 or KSC1845 or BC337

2SC1318         KSC2383Y or KSC2690AY                           Thermal stress, thermal flex

2SC1344         2SC2240 or KSC1845                              Static burst

2SC1345         KSC1845

2SC1400         KSC1845

2SC1451         KSC3503                                         Static burst, open circuit faults


2sc1000 replace

2SC458 & 2SC1000 you could use ---2SC1815-------KSC1815

http://www.mouser.com/ProductDetail...GAEpiMZZMsTKkj12KWLXuW5oDYpP%2bzxGbXKcGxnyRY=

2SC458-----KSC1845 -- higher voltage

http://www.mouser.com/ProductDetail...GAEpiMZZMsTKkj12KWLXuW5oDYpP%2bzxSlkrctCof5s=



Better Hfe gain numbers

http://www.bdent.com/2SC2240BL-p/2sc2240bl.htm

Use 2SC2240BL for both 2SC458 & 2SC1000..


2SC1000 is a very low-noise transistor which can't be replaced by an el cheapo 2SC945 - take a 2SC2240 (2SC2547 or 2SC3198) instead. For the 2SA493 take a 2SA970 (2SC1085 or 2SC1048).


For 2SC1000 I use Toshiba 2SC3329BL, much lower noise. For 2SA493 I use 2SA1084 made by Hitachi or Renesas.


lupa di copy link nya
ntar dicari lagi
waktu itu lagi nyari replacement 2SC1000, di search, muncullah situs itu

1 comment:

TS780 perbaikan encoder unit (bag1) Teori operasi TS780. Awalnya display frekuensi dapat digeser via dial besar di depan pada saat kondisi...