Obsolete Transistor ?

[geode]

I'm looking for a replacement for a complementary pair of transistors in a Marantz 1060. They are 2SC371 and 2SA562. The data substitution book has the replacement for 2SC371 as the 2SC1815, it lists the KSA992 as the complement to the 2SC1815. I have both of these on hand. I looked at the datasheet on the KSA992 versus the 2SA562. It looks okay in all categories except the Ic and Ie are lower on the KSA992. Anybody care to take a look and see what you think about this replacement. Thanks.

***********FOR the KSA992********

PNP Epitaxial Silicon Transistor
Absolute Maximum Ratings Ta=25°C unless otherwise noted
Electrical Characteristics Ta=25°C unless otherwise noted
hFE2 Classification
Symbol Parameter Ratings Units
VCBO Collector-Base Voltage -120 V
VCEO Collector-Emitter Voltage -120 V
VEBO Emitter-Base Voltage -5 V
IC Collector Current -50 mA
IB Base Current -10 mA
PC Collector Power Dissipation 500 mW
TJ Junction Temperature 150 °C
TSTG Storage Temperature -55 ~ 150 °C
Symbol Parameter Test Condition Min. Typ. Max. Units
ICBO Collector Cut-off Current VCB= -120V, IE=0 -50 nA
ICEO Collector Cur-off Current VCE= -100V, IB=0 -1 μA
IEBO Emitter Cut-off Current VEB= -5mA, IC=0 -50 nA
hFE1
hFE2
DC Current Gain VCE= -6V, IC= -0.1mA
VCE= -6V, IC= -1mA
150
200
500
500 800
VBE (on) Base-Emitter On Voltage VCE= -6V, IC= -1mA -0.55 -0.61 -0.65 V
VCE (sat) Collector-Emitter Saturation Voltage IC= -10mA, IB= -1mA -0.09 -0.3 V
fT Current Gain Bandwidth Product VCE= -6V, IC= -1mA 50 100 MHz
Cob Output Capacitance VCB= -30V, IE=0, f=1MHz 2 3 pF
NV Noise Voltage VCE = -5.0V, IC = -1.0mA,
RG =100KW, GV = 80dB,
f = 10Hz to 1.0KHz
25 40 mV

**************FOR the 2SA562**********
Vcbo 30
VCeo 30
VEbo 5
Ic 400ma
Ie 400ma
Pc 300mw
Hfe 70 Min 400 Max

 

[HypnoToad]

You can find both of the originals here:

http://www.bdent.com/

 

[geode]

You can find both of the originals here:

http://www.bdent.com/

Thanks. I'm trying to use the transistors I have. I don't want to get whacked by shipping costs. I will buy them if I have to, though. I appreciate the link :yes:

 

[Detailman]

I've used the 992 and ksc 1845 in the 2230 which I believe is the same as the 1060 plus the tuner.

Sound great and never had any problems.

I don't think you can hurt anything. Believe me I understand about the shipping for small orders. Shipping keeps getting higher and higher.

 

[EchoWars]

The only place those transistors are used is in the current foldback circuit (V/I limiter) of the amplifier. I'd want something capable of 100mA there. The usual choice for these duties is the 2SA733 and 2SC945. Fairchild has the KSA733C and KSC945C (the 'C' suffix is important), and they would do a fine job here.

 

[geode]

The only place those transistors are used is in the current foldback circuit (V/I limiter) of the amplifier. I'd want something capable of 100mA there. The usual choice for these duties is the 2SA733 and 2SC945. Fairchild has the KSA733C and KSC945C (the 'C' suffix is important), and they would do a fine job here.

Thanks heaps. I don't want to f*$K up this amp. Looks like I need to go shopping again. I have a need for some more stuff for a SX-1050 I will be doing a restore on. Thanks EWs. I appreciate the feedback from all of you guys. I learn something new with every post and read. :thmbsp: