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Roland JC 77 transisters ? I have the specs but not sure how to find replacement

Started by Jason G, September 16, 2007, 10:03:59 PM

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Jason G

Ok
I have a JC 77 with abnormal hiss. Abnormal even for JC 's. I used an audio proble to trouble shoot.
everythings cool till it hits these transisters on one of the amps. I done some reading on subing transisers but still find my self lost in the sea of numbers. Any help would be apreciated.
Thanks

Part Number = 2SA970GR
Manufacturer Name = Various
Description = Si PNP Lo-Pwr BJT
V(BR)CEO (V) = 120
V(BR)CBO (V) = 120
I(C) Abs.(A) Collector Current = 100m
Absolute Max. Power Diss. (W) = 300m
I(CBO) Max. (A) = 100n
@V(CBO) (V) (Test Condition) = 120
V(CE)sat Max.(V) = .3
@I(C) (A) (Test Condition) = 10m
@I(B) (A) (Test Condition) = 1.0m
h(FE) Min. Static Current Gain = 200
h(FE) Max. Current gain. = 400
@I(C) (A) (Test Condition) = 2.0m
@V(CE) (V) (Test Condition) = 6.0
f(T) Min. (Hz) Transition Freq = 100M
@I(C) (A) (Test Condition) = 1.0m
@V(CE) (V) (Test Condition) = 6.0
C(obo) (Max) (F) = 4.0p
@V(CB) (V) (Test Condition) = 10
@Freq. (Hz) (Test Condition) = 1.0M
Package = TO-92
Military = N

Jason G

I just realized I had some of these hanging around .

SK3450


Various :: Si PNP Lo-Pwr BJT   
Specsheet / Datasheet


V(BR)CEO (V)=80

V(BR)CBO (V)=80

I(C) Abs.(A) Collector Current=500m

Absolute Max. Power Diss. (W)=750m

h(FE) Min. Static Current Gain=160

@I(C) (A) (Test Condition)=150m

@V(CE) (V) (Test Condition)=10

f(T) Min. (Hz) Transition Freq=120M

Package=TO-92var

Military=N